A Lubrication Method for Multi-station Thermoforming Die
A thermoforming, multi-station technology, applied in the direction of forming tools, manufacturing tools, metal processing equipment, etc., can solve the problems of punching parts lubrication, large wall thickness difference of cylindrical parts, etc., so as to improve the life of the mold and reduce the wall thickness Poor, reduce the effect of forming force
Active Publication Date: 2015-12-30
NO 59 RES INST OF CHINA ORDNANCE IND
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
The lubrication of the existing drawing technology only lubricates the drawing ring before drawing, and does not lubricate the punched part. In the later stage of drawing, the wall thickness difference of the cylindrical part will be large due to insufficient lubricant between the punching part and the drawing ring.
Method used
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[0012] Below in conjunction with the preferred embodiments, the specific implementation methods provided according to the present invention are described in detail as follows: See the accompanying drawings for details, a method for lubricating a multi-station thermoforming mold, the multi-station thermoforming mold includes a mobile mold base 1 The pressing punch 2, the punching punch 3, the punching guide sleeve 4, the pressing punching die 5, the drawing punch 7, a plurality of drawing rings 8, 11, 12 on the top are formed on the blank after pressing 6 Put lubricant in the upper part or in the pre-punching hole, apply lubricant on the punching punch 3 before punching, spray or wipe the lubricant on the punching die 5 before putting the blank 6 in, and spray the ring 11 before drawing Spray lubricant to the drawing and stretching ring. It is characterized in that: the front end of the pressing punch 2 includes two parts, the punching and pre-punching part and the guide part. T...
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Abstract
The invention discloses a multi-station hot forming and plastic forming die for pressing, punching and pulling and stretching of a cylindrical piece with a deep blind hole and a lubrication method. The front end of a pressing punch comprises a pre-punching part and a guide part. The pre-punching part is integrally formed by a cylinder and a tapered part, the total height of the pre-punching part is 10-35% the depth of a hole to be punched, the diameter of the larger end of the tapered part equals that of a hole in the mouth portion of the cylindrical piece, and the diameter of the column is 65-85% the diameter of the hole in the mouth portion of the cylindrical piece. Guide of the pressing punch and a female die is achieved through a guide part, and the height of the guide part is 1.2-2 times the diameter of the guide part. An atomizing ring or a powder spraying ring is arranged above a first pulling and stretching ring. After pressing, a mixture of graphite powder and saw powder is filled into the hole pre-punched in a blank through the pressing punch by 70-85% the volume of the hole, and then the hole is punched. When pulling and stretching are carried out, atomized graphite is sprayed to a punching piece through the atomizing ring, or graphite powder or glass powder is sprayed through the powder spraying ring. The multi-station hot forming die and the lubrication method have the advantages of achieving continuous lubrication in the punching pulling and stretching process, the wall thickness difference of the cylindrical piece is reduced, and the service life of the die is prolonged.
Description
technical field [0001] The invention belongs to a lubricating method for a plastic forming die, in particular to a lubricating method for a plastic forming die of a multi-station thermoforming deep blind-hole cylindrical part of pressing, punching and drawing. Background technique [0002] For plastic thermoformed metal deep blind hole cylindrical parts, back-extrusion punching is commonly used, and then drawing is formed after back-extrusion punching. The patent "a large-scale screw drilling tool centralizer hot extrusion forming process" adopts blanking-heating-pressing-deep punching to form the screw drilling tool centralizer, and adopts the pressing punch fixed on the movable beam, Punching punch, the pressing punch adopts a flat surface during pressing, and the upper surface of the blank forms a flat end face after pressing. The utility model patent "three-punch punching slide" with the application number of 201020229488.2 discloses a slide table for fixing a punch for...
Claims
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IPC IPC(8): B21D37/10B21D35/00
Inventor 黄少东赵祖德张志明赵志翔
Owner NO 59 RES INST OF CHINA ORDNANCE IND