CN1248809C - Method for removing wastes of metal casting productions and molding tools - Google Patents

Abstract

A mold for removing waste from metal casting products, including a first mold and a second mold, the upper and lower molds of the first mold are respectively equipped with a number of pairs of first punches, and the punching part forms a sharp knife-shaped punch Cutting edge, the angle of the punching edge is 60 degrees, and the other end forms a fixed part; and the upper die of the second mold is equipped with a number of second punches, which are columnar in the axial direction, The cross-sectional shape corresponds to the shape of the workpiece burr processing part. The punching part has multiple punching edges. The angle of each punching edge is 90 degrees, and the center distance decreases step by step from top to bottom. , so that the punching part as a whole presents a ladder shape, removing burrs segment by segment.

Description

Molds for removal of metal casting product waste

【Technical field】

The invention relates to a mold for removing waste from metal casting products.

【Background technique】

With the development of industrial technology, in order to meet the demand of real-time supply, the processing cycle of products is getting shorter and shorter. At the same time, the traditional manual processing method is increasingly showing its defects.

Metal casting products usually have three types of scrap: main gate scrap, vent scrap, and burr scrap on the inner and outer hole edges of the product. Traditionally, there are two ways to remove the waste at the gate and the exhaust port: one is the manual method, and the worker first removes part of the waste by hand, and then performs machining; the other is to remove the waste on a sawing machine or a milling machine, which requires a jig After the workpiece is held hostage, the waste removal process can be carried out. Traditional deburring is also done manually by workers with files. However, the removal of the main gate and the waste of the exhaust port are manually removed, the work efficiency is low, and the required accuracy cannot be achieved at one time; Sometimes, the workpiece is prone to cracks or even breaks, so the product rejection rate is high. At the same time, the method of manual deburring has high labor intensity for workers, and the burrs are easy to flang and have a high reject rate, which cannot realize production automation.

【Content of invention】

The technical problem to be solved by the present invention is to provide a mold for reducing the scrap rate of workpieces and realizing the automatic removal of scraps from metal casting products.

The mold for removing metal casting product waste according to the present invention includes a first mold and a second mold. The first mold includes a first upper mold and a first lower mold, and is respectively equipped with several pairs of first punches. The first punching part of a punch forms a sharp knife-shaped punching edge, the angle of the punching edge is 60 degrees, and its other end forms a first fixing part; and the second mold includes a second The upper mold, the second lower mold 1 and the second punch, the second punch is installed on the second upper mold, its axial direction is columnar, the cross-sectional shape corresponds to the shape of the workpiece burr processing part, and the punching part has multiple The punching edge, the angle of each punching edge is 90 degrees, and the center distance of the punching edge decreases step by step from top to bottom, so that the punching part as a whole presents a ladder shape and is removed segment by segment glitch.

The present invention removes the mold for metal casting product waste, and its advantage is that: the first and second molds for removing metal casting product waste in the present invention utilize a plurality of sharp knife-shaped first punches and ladder-shaped second punches, respectively To remove scraps of metal die-casting products by category, the stepped second punch can remove burrs in sections to avoid damage to workpieces caused by burrs and flanging. At the same time, most of the traditional waste removal methods are manually removed by workers on the assembly line. Not only is the efficiency low, but the burr flanging is easy to damage the workpiece, resulting in a high scrap rate. However, the mold for removing metal casting product waste in the present invention can realize the removal of metal waste. automation.

The present invention will be further described below in conjunction with examples with reference to the accompanying drawings.

【Description of drawings】

Fig. 1 is a schematic plan view of the first mold for removing waste from metal casting products according to the present invention.

Fig. 2 is a perspective view of the first punch of the first mold for removing waste from metal casting products according to the present invention.

Fig. 3 is a schematic plan view of the second mold for removing waste from metal casting products according to the present invention.

Fig. 4 is a perspective view of the second punch of the second mold for removing waste from metal casting products according to the present invention.

FIG. 5 is a partially enlarged view of the second punch of FIG. 4 .

【Detailed ways】

Please refer to FIG. 1 to FIG. 5 at the same time. The mold for removing waste from metal casting products according to the present invention includes a first mold 10 and a second mold 100 .

The first mold 10 is composed of a first upper mold 12 and a first lower mold 30, and is installed symmetrically on the first upper mold 12 and the first lower mold 30 by a plurality of first punches 22 to cut and cast Port and exhaust port waste. The first upper mold 12 includes an upper mold base 16 , an upper splint 18 and an upper punching plate 20 from top to bottom, and is fixed together by several pins 13 and screws 14 . A plurality of first punches 22 are locked by screws 28 on the side wall of the upper hitting plate 20, and the first punches 22 include a first punching part 23 and a first fixing part 25. The punching part 23 is formed with a sharp knife-shaped wedge-shaped punching edge 24 with an angle of 60 degrees (other angles are also possible), and the first fixing part 25 is provided with a fixing hole 26 . The first lower mold 30 includes a lower clamping plate 32, a lower backing plate 34 and a lower mold base 36, and the lower clamping plate 32 is also equipped with a plurality of first punches 22 corresponding to the first punch 22 of the first upper mold 12, The upper surface of the lower clamping plate 32 is also provided with a number of support blocks 40 slightly higher than the first punch 22 on it for supporting the workpiece.

The second mold 100 is composed of a second upper mold 102 and a second lower mold 130 , and a plurality of second punches 122 installed on the upper mold base 102 are used to refine the burrs of the metal die-casting product. The second upper mold 102 includes an upper mold base 106, an upper clamping plate 108, a stripping plate 110 and an upper punching plate 112 from top to bottom, and is fixed together by a number of pins 103 and screws 104, and some of the screws 104 cover After setting a sleeve 105 of equal height, it passes through the upper splint 108 and is screwed on the stripping plate 110 . The upper splint 108 , the stripping plate 110 and the upper punching plate 112 are provided with a plurality of through receiving holes 118 , and the top side walls of the receiving holes 118 of the upper splint 108 sink inward to form a groove (not shown). The second punch 122 can be installed in the receiving hole 118 of the upper splint 108, the second punch 122 is columnar in the axial direction, and the shape of the cross section 127 corresponds to the shape of the burr processing part of the workpiece, which includes a The second punching portion 123 and a second fixing portion 125, the second punching portion 123 has a plurality of punching edges 124 step by step, the angle of each punching edge 124 is 90 degrees, the described The center distance of the punching edge 124 decreases step by step from top to bottom, so that the punching part 123 as a whole presents a stepped shape to remove burrs step by step; the second fixing part 125 is provided with a positioning boss 126 protruding outward, Used to buckle into the groove at the top of the receiving hole 118 . The upper mold base 106 and the upper clamping plate 108 are also provided with a plurality of receiving holes 128 (only one of which is shown in the figure) for receiving the spring 129 . The second lower mold 130 includes a lower template 132 , a lower backing plate 134 and a lower mold base 136 , and a plurality of positioning blocks 140 protrude from the upper surface of the lower template 132 .

During work, at first the workpiece is installed on the support block 40 of the first die 10, so that its waste is positioned above the first punch 22 of the first lower die 30, and then the first punch 22 of the first upper die 12 is controlled Punching downwards, working together with the first punch 22 of the first lower die 30 to cut the workpiece waste; then, the workpiece is placed on the lower template 132 of the second mold 100, positioned by the positioning block 140 of the lower template 132, Control the second upper mold 130 of the second mold 100 to move downwards, the upper clamping plate 112 first presses the workpiece, and the upper clamping plate 108, the stripping plate 110 and the upper die base 106 continue to move downward, so that the upper clamping plate 108 The distance between the stripping plate 110 and the stripping plate 110 is reduced, thereby compressing the spring 129, and at this time, the second punch 122 stretches out from the upper punching plate 112 and removes the workpiece burrs segment by segment; finally, the second upper die 102 of the second die 100 Pick up, the second punch 122 retracts into the upper beating plate 112 with the recovery of the spring 129 and breaks away from the workpiece.

Claims (10)

1. mould of removing metal casting product waste material, it comprises:

One first mould, it comprises one first patrix, one first counterdie one and a plurality of first punching pin, and the described first punching pin symmetry be installed in first patrix and first counterdie, it comprises the first stamping-out portion and first fixed part, the first stamping-out portion forms the stamping-out cutting edges of one or six ten degree;

One second mould, comprise one second patrix, second counterdie and a plurality of second punching pin, described second punching pin is installed in second patrix, it comprises the second stamping-out portion and second fixed part, the second stamping-out portion offers the stamping-out cutting edge that a plurality of centre-to-centre spacing reduce step by step step by step from top to bottom, and the angle of each stamping-out cutting edge is 90 degree.

2. the mould of removal metal casting product waste material as claimed in claim 1 is characterized in that: offer one on described first fixed part and can be fixed on the fixing hole of first patrix and first counterdie for screw passes.

3. the mould of removal metal casting product waste material as claimed in claim 2 is characterized in that: described first counterdie is provided with a lower plate, and the lower plate upper surface is provided with some back-up blocks a little more than first punching pin.

4. the mould of removal metal casting product waste material as claimed in claim 1 is characterized in that: described second patrix comprises successively that from top to bottom upper bolster, train wheel bridge, stripper plate re-pack on reaching, and be fixed together by some pins and screw.

5. the mould of removal metal casting product waste material as claimed in claim 4 is characterized in that: be equiped with some springs between described train wheel bridge and stripper plate.

6. the mould of removal metal casting product waste material as claimed in claim 4, it is characterized in that: described screw is provided with contour sleeve.

7. the mould of removal metal casting product waste material as claimed in claim 4 is characterized in that: described train wheel bridge, stripper plate and on re-pack and offer some accepting holes that run through, and the accepting hole top sidewall of described train wheel bridge inwardly is absorbed in and forms a groove.

8. the mould of removal metal casting product waste material as claimed in claim 7 is characterized in that: outside one convexes with a boss that can buckle in the accepting hole top groove on the fixed part of described second punching pin.

9. the mould of removal metal casting product waste material as claimed in claim 5 is characterized in that: described upper bolster and train wheel bridge also offer some accepting holes of accommodating described spring.

10. the mould of removal metal casting product waste material as claimed in claim 4 is characterized in that: described second counterdie has template, and the upper surface of lower bolster convexes with several locating pieces.

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