CN211990763U

CN211990763U - High-precision M2 miniature screw cold heading die

Info

Publication number: CN211990763U
Application number: CN202020538497.3U
Authority: CN
Inventors: 朱树权; 倪达; 范旭阳
Original assignee: Ningbo Qiancheng Precision Machinery Manufacturing Co ltd
Current assignee: Ningbo Qiancheng Precision Machinery Manufacturing Co ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-11-24
Anticipated expiration: 2030-04-13

Abstract

The utility model belongs to the technical field of the cold-heading mould technique and specifically relates to a miniature screw rod cold-heading mould of M2 of high accuracy, including forming die, the welding of forming die one side has plastic mould, forming die and plastic mould center department run through respectively and the vertical forming die cavity and the plastic die cavity that are equipped with. The utility model discloses when using, the copper wire that will correspond length is placed earlier in the shaping die cavity, utilize solid towards the copper wire of stick in to the shaping die cavity to extrude, then the utilization moves back the extrusion's of module in with the shaping die cavity copper wire ejecting, place extrusion's copper wire in the shaping die cavity again, utilize the plum blossom to dash the stick and carry out the secondary extrusion to extrusion's copper wire, in the extrusion, the chamfer recess on the chamfer mould can carry out the chamfer operation to extrusion's copper wire bottom, it can to utilize the chamfer mould to release the good copper wire of extrusion in with the shaping die cavity at last, this miniature screw rod cold-heading mould of M2 of high accuracy can improve below the M4 if the cold-heading precision of the miniature screw rod of M2.

Description

High-precision M2 miniature screw cold heading die

Technical Field

The utility model relates to a cold-heading mould technical field especially relates to a miniature screw rod cold-heading mould of M2 of high accuracy.

Background

The cold heading process is one of the novel processes for machining less and no cutting metal under pressure. The method is a processing method which utilizes the plastic deformation generated by metal under the action of external force and redistributes and transfers the volume of the metal by means of a die so as to form the required part or blank. The cold heading process is most suitable for producing standard fasteners such as bolts, screws, nuts, rivets, pins, and the like.

The existing cold heading die is suitable for processing larger screws more than M4, and the cold heading precision of miniature screws less than M4 such as M2 is not high, so that the miniature screws can not meet the high-precision requirement generally, and therefore the high-precision M2 miniature screw cold heading die is required to meet the requirement.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the shortcoming that the cold-heading precision is not high like the miniature screw rod of M2 below the cold-heading mould processing M4 that exists among the prior art, and the miniature screw rod cold-heading mould of M2 of a high accuracy that provides.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the high-precision M2 miniature screw cold heading die comprises a forming die, wherein a shaping die is welded on one side of the forming die, a forming die cavity and a shaping die cavity are respectively penetrated and vertically arranged at the centers of the forming die and the shaping die, supporting plates are respectively and vertically welded at the lower surface edge of the forming die on one side of the forming die cavity and the lower surface edge of the shaping die on one side of the shaping die cavity, the bottoms of the two supporting plates are commonly and vertically welded with a base, a retreating module and a chamfering die are respectively inserted into the bottoms of the forming die cavity and the shaping die cavity, a chamfering groove is formed in the top end of the chamfering die, the bottoms of the retreating module and the chamfering die are respectively arranged outside the forming die cavity and the shaping die cavity, fixing rods are vertically welded at the bottoms of the retreating module and the chamfering;

equal vertical solid towards stick and the plum blossom towards the stick of being equipped with directly over shaping die cavity and plastic die cavity, solid towards stick and plum blossom towards the common perpendicular welding on the stick top and have the second to remove the push pedal, equal perpendicular welding has second electric telescopic handle, two on the second removes push pedal upper surface both ends common perpendicular welding has first fixed plate on the second electric telescopic handle top, the perpendicular welding of first fixed plate upper surface center department has the dwang, it is equipped with first drum to rotate through the bearing on the dwang bottom, first drum perpendicular welding is on the base upper surface of first removal push pedal one side, be equipped with the position limiting mechanism between dwang and the base jointly.

Preferably, actuating mechanism includes two electric telescopic handle, two the equal vertical welding of first electric telescopic handle is on the base upper surface between two backup pads, two common vertical welding has first removal push pedal on the first electric telescopic handle top, and the equal vertical welding of two dead lever bottoms is on first removal push pedal, the backup pad slides and runs through first removal push pedal setting.

Preferably, one of them the perpendicular welding of first removal push pedal lower surface edge of one side of electric telescopic handle has the cutting off cutter, and the backup pad setting is between first electric telescopic handle and cutting off cutter.

Preferably, the position limiting mechanism comprises a second fixing plate and a second cylinder, the second cylinder is vertically welded on the upper surface of the base between the first cylinder and the first movable push plate, the second fixing plate is vertically welded on the side surface of the rotating rod, an inverted L-shaped insertion rod is inserted on the second fixing plate in a sliding mode, and the bottom end of the insertion rod is inserted in the second cylinder.

Preferably, the insertion rod is made of a hard rubber rod.

The utility model provides a pair of miniature screw rod cold-heading mould of M2 of high accuracy, beneficial effect lies in: when the high-precision M2 miniature screw cold heading die is used, copper wires with corresponding lengths are placed in a forming die cavity firstly, the solid punch is used for extruding the copper wires in the forming die cavity, then the extrusion-molded copper wires in the forming die cavity are ejected out by the aid of the ejection module, the extrusion-molded copper wires are placed in a shaping die cavity, the extrusion-molded copper wires are subjected to secondary extrusion by the aid of the quincuncial punch, the bottom ends of the extrusion-molded copper wires can be chamfered by the aid of the chamfering grooves in the chamfering die during extrusion, and finally the extruded copper wires in the shaping die cavity are pushed out by the chamfering die, so that the high-precision M2 miniature screw cold heading die can improve the cold precision of M4 and the like of M2 miniature screws.

Drawings

Fig. 1 is a schematic structural view of a high-precision M2 micro screw cold heading die provided by the present invention;

fig. 2 is a front view of the high-precision M2 micro screw cold heading die provided by the present invention;

fig. 3 is the right side view of the M2 miniature screw cold heading die with high precision provided by the utility model.

In the figure: the device comprises a forming die 1, a shaping die 2, a forming die cavity 3, a shaping die cavity 4, a supporting plate 5, a base 6, a demoulding module 7, a chamfering die 8, a chamfering groove 9, a fixing rod 10, a first movable push plate 11, a first electric telescopic rod 12, a cutting knife 13, a first cylinder 14, a rotating rod 15, a first fixing plate 16, a second electric telescopic rod 17, a second movable push plate 18, a solid punching rod 19, a plum blossom punching rod 20, a second fixing plate 21, an insertion rod 22 and a second cylinder 23.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Example 1

Referring to fig. 1-3, a miniature screw rod cold-heading mould of M2 of high accuracy, including forming die 1, the welding of forming die 1 one side has plastic mould 2, and forming die 1 and plastic mould 2 center department run through respectively and vertically are equipped with forming die cavity 3 and plastic die cavity 4, and the internal diameter of forming die cavity 3 is 1.67 millimeters, and the internal diameter of plastic die cavity 4 is 1.69 millimeters.

The lower surface edge of a forming die 1 at one side of a forming die cavity 3 and the lower surface edge of a shaping die 2 at one side of a shaping die cavity 4 are vertically welded with supporting plates 5, the bottoms of the two supporting plates 5 are vertically welded with a base 6 together, the bottoms of the forming die cavity 3 and the shaping die cavity 4 are respectively inserted with a withdrawing module 7 and a chamfering die 8, the top end of the chamfering die 8 is provided with a chamfering groove 9, the bottoms of the withdrawing module 7 and the chamfering die 8 are respectively arranged outside the forming die cavity 3 and the shaping die cavity 4, the bottoms of the withdrawing module 7 and the chamfering die 8 are vertically welded with fixing rods 10, the bottoms of the two fixing rods 10 are provided with a driving mechanism together, the driving mechanism comprises two first electric telescopic rods 12, the two first electric telescopic rods 12 are vertically welded on the upper surface of the base 6 between the two supporting plates 5, the tops of the two first electric telescopic, and two dead lever 10 bottoms all weld perpendicularly on first removal push pedal 11, and backup pad 5 slides and runs through first removal push pedal 11 setting, and the edge of the first removal push pedal 11 lower surface of one of them 12 one sides of electric telescopic handle has welded cutting off cutter 13 perpendicularly, and backup pad 5 sets up between first electric telescopic handle 12 and cutting off cutter 13. A copper wire having a diameter of 1.65 mm is cut by a cutting blade 13, and the length of the cut copper wire is slightly shorter than that of the molding cavity 3.

Equal vertical solid towards stick 19 and the plum blossom towards stick 20 of being equipped with directly over shaping die cavity 3 and shaping die cavity 4, solid towards stick 19 and the common vertical welding on the plum blossom towards stick 20 top have the second to remove push pedal 18, equal vertical welding has second electric telescopic handle 17 on the second removes push pedal 18 upper surface both ends, common vertical welding has first fixed plate 16 on two second electric telescopic handle 17 tops, 16 upper surface centers department vertical welding of first fixed plate has dwang 15, rotate through the bearing on the 15 bottom of dwang and be equipped with first drum 14, first drum 14 vertical welding is on the 6 upper surfaces of the base of 11 one sides of first removal push pedal, be equipped with the position limiting mechanism between dwang 15 and the base 6 jointly.

When the high-precision M2 miniature screw cold-heading die is used, an intercepted copper wire with the diameter of 1.65 mm is firstly placed in a forming die cavity 3, a wire blank processed in the forming die cavity 3 is placed in a shaping die cavity 4, at the moment, under the action of a second electric telescopic rod 17, a solid punching rod 19 and a plum blossom punching rod 20 respectively extrude the copper wire in the forming die cavity 3 and the wire blank in the shaping die cavity 4, under the action of the solid punching rod 19 and the plum blossom punching rod 20, the outer diameter of the copper wire in the forming die cavity 3 is expanded to 1.67 mm, the outer diameter of the wire blank in the shaping die cavity 4 is accurately expanded to the required range from 1.68 mm to 1.69 mm (including 1.68 mm and 1.69 mm), in the extrusion process of the wire blank in the shaping die cavity 4 by the plum blossom punching rod 20, the bottom end of the wire blank forms a C0.2 chamfer under the action of a chamfer groove 9 on a chamfer die 8, and finally the second electric telescopic rod 17 is retracted, the second movable push plate 18 is turned aside, the situation that the solid punching rod 19 and the plum blossom punching rod 20 block pushing out of copper wires and wire embryos is avoided, under the action of the first electric telescopic rod 12, the copper wires extruded in the forming die cavity 3 and the wire embryos extruded in the shaping die cavity 4 are pushed out by the aid of the withdrawing module 7 and the chamfering die 8, the first electric telescopic rod 12 retracts, the copper wires are placed on the base 6 below the cutting knife 13 in preparation for next operation, when the first electric telescopic rod 12 retracts to the shortest time, the cutting knife 13 can just cut off the copper wires, and product errors produced by the high-precision M2 micro screw cold heading die cannot exceed 0.02 mm.

Example 2

Referring to fig. 1 to 3, as another preferred embodiment of the present invention, the difference from embodiment 1 is that the position limiting mechanism includes a second fixing plate 21 and a second cylinder 23, the second cylinder 23 is perpendicularly welded on the upper surface of the base 6 between the first cylinder 14 and the first movable push plate 11, the second fixing plate 21 is perpendicularly welded on the side of the rotating rod 15, the second fixing plate 21 slides on and is inserted with an inverted "L" shaped insertion rod 22, the bottom end of the insertion rod 22 is inserted in the second cylinder 23, and the insertion rod 22 is made of a hard rubber rod. When the inserting rod 22 is inserted into the second cylinder 23, the solid punching rod 19 is ensured to face the molding cavity 3, the quincuncial punching rod 20 is ensured to face the shaping cavity 4, the solid punching rod 19 is accurately inserted into the molding cavity 3, and the quincuncial punching rod 20 is accurately inserted into the shaping cavity 4.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a miniature screw rod cold-heading mould of M2 of high accuracy, includes forming die (1), its characterized in that, forming die (1) one side welding has plastic mould (2), forming die (1) and plastic mould (2) center punishment do not run through and vertically are equipped with forming die cavity (3) and plastic die cavity (4), the equal vertical welding in forming die (1) lower surface edge of forming die (3) one side and plastic mould cavity (4) one side has backup pad (5), two the common vertical welding in backup pad (5) bottom has base (6), the cartridge has respectively to move back module (7) and chamfer mould (8) forming die cavity (3) and plastic die cavity (4) bottom, be equipped with chamfer recess (9) on chamfer mould (8) top, it sets up respectively at the outer of forming die cavity (3) and plastic die cavity (4) to move back module (7) and chamfer mould (8) bottom The bottom ends of the retreating module (7) and the chamfering die (8) are vertically welded with fixing rods (10), and the bottom ends of the two fixing rods (10) are jointly provided with a driving mechanism;

a solid punch rod (19) and a plum blossom punch rod (20) are vertically arranged right above the molding die cavity (3) and the shaping die cavity (4), a second movable push plate (18) is vertically welded on the top ends of the solid punch rod (19) and the plum blossom punch rod (20) together, the two ends of the upper surface of the second movable push plate (18) are vertically welded with second electric telescopic rods (17), the top ends of the two second electric telescopic rods (17) are vertically welded with a first fixing plate (16) together, a rotating rod (15) is vertically welded at the center of the upper surface of the first fixing plate (16), a first cylinder (14) is rotatably arranged at the bottom end of the rotating rod (15) through a bearing, the first cylinder (14) is vertically welded on the upper surface of the base (6) at one side of the first movable push plate (11), and a position limiting mechanism is arranged between the rotating rod (15) and the base (6) together.

2. The high-precision M2 miniature screw cold-heading die as claimed in claim 1, wherein the driving mechanism comprises two first electric telescopic rods (12), both of the two first electric telescopic rods (12) are vertically welded on the upper surface of the base (6) between the two support plates (5), the two first electric telescopic rods (12) are vertically welded on the top ends together with a first movable push plate (11), and the bottom ends of both fixed rods (10) are vertically welded on the first movable push plate (11), the support plates (5) are slidably arranged through the first movable push plate (11).

3. The high-precision M2 miniature screw cold heading die of claim 2, wherein a cutting knife (13) is perpendicularly welded at the lower surface edge of the first moving push plate (11) at one side of one of the first electric telescopic rods (12), and the support plate (5) is arranged between the first electric telescopic rod (12) and the cutting knife (13).

4. The high-precision M2 miniature screw cold-heading die as claimed in claim 1, wherein the position limiting mechanism comprises a second fixing plate (21) and a second cylinder (23), the second cylinder (23) is vertically welded on the upper surface of the base (6) between the first cylinder (14) and the first movable push plate (11), the second fixing plate (21) is vertically welded on the side surface of the rotating rod (15), an inverted L-shaped insertion rod (22) is slidably inserted on the second fixing plate (21) in a penetrating manner, and the bottom end of the insertion rod (22) is inserted in the second cylinder (23).

5. The high-precision M2 miniature screw cold-heading die of claim 4, wherein the plug rod (22) is made of hard rubber rod.