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Hydraulic drawing forming method for oil pan without draft angle

A technology of oil pan and draft angle, which is used in forming tools, petroleum industry, machinery and equipment, etc., can solve the problems of uneven material thickness, cracking, wrinkling, etc., and achieve the effect of minor scratches and friction solving

Active Publication Date: 2017-05-31
湖北凸凹模具科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For turbocharged engine oil pans, there are some product types that are draft-free oil pans, such as figure 1 As shown, if the side wall A has no draft angle, it cannot be stamped and formed by the conventional drawing method, and the purpose cannot be achieved by applying ordinary drawing oil on the surface of the convex die and the cavity of the concave mold of the drawing die. Severe wrinkling and cracking, uneven material thickness

Method used

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  • Hydraulic drawing forming method for oil pan without draft angle
  • Hydraulic drawing forming method for oil pan without draft angle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1, preparation anti-extrusion medium:

[0019] Anti-extrusion medium, by mass percentage, consists of the following components: 30% mineral oil; 10% carboxylate; 10% boric acid or borate; 20% alkanolamine; 9% sodium petroleum sulfonate; 11 % Propylene Glycol Ether; 9% Nonionic Surfactant; 0.5% Defoamer; 0.5% Organic Sulfur Bactericide;

[0020] Mix the components uniformly to obtain the anti-extrusion medium.

Embodiment 2

[0022] Anti-extrusion medium for hydraulic drawing of oil sumps without draft angle, consisting of the following components, by mass percentage: 31% mineral oil, 9% carboxylate, 8% boric acid or borate , 21% alkanolamine, 11% sodium petroleum sulfonate, 9% propylene glycol ether, 10% nonionic surfactant, 0.7% defoamer, 0.3% organic sulfur fungicide; Mix the components uniformly to obtain the anti-extrusion medium.

[0023] In the present invention, the carboxylate is selected from one of formate, acetate or oxalate; the sodium or potassium salt of formic acid, the sodium or potassium salt of acetic acid, the sodium of oxalate salt or potassium salt.

[0024] In the present invention, the borate is selected from one of sodium borohydride and ammonium hydrogen borate.

[0025] In the present invention, when boric acid or borate is selected, boric acid is preferred.

[0026] In the present invention, the alkanolamine is selected from one of N,N-diethylethanolamine, N,N-dimethy...

Embodiment 3

[0041] The method for hydraulic drawing and forming of oil pan without draft angle, the steps are as follows:

[0042] (1) Install the drawing forming die on the hydraulic drawing machine, inject the anti-extrusion medium of Example 1 on the top material plate in the cavity of the concave mold to ensure that the top material plate is completely covered;

[0043] (2) Put a flat material on the cavity filled with medium, and apply conventional drawing oil on the punch;

[0044] (3) Mold closing: Start the hydraulic drawing machine to close the upper drawing mold and the lower drawing mold of the drawing mold;

[0045] (4) Material return: The formed engine oil pan exits the drawing forming die.

[0046] The effect of embodiment 3: through 500 product processings, pass rate is at 98%.

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Abstract

The invention provides a hydraulic drawing forming method for an oil pan without a draft angle. The method comprises the following steps: (1) arranging a drawing forming mold on a hydraulic drawing machine, injecting an anti-extrusion medium into a material jacking plate in a concave cavity and fully covering the material jacking plate, wherein the anti-extrusion medium is formed by mixing mineral oil, carboxylate, boric acid or borate, hydramine, petroleum sodium sulfonate, propylene glycol ether, non-ionic surfactant, de-foaming agent and bactericide; (2) putting a slab on the cavity filled with the medium and coating conventional drawing oil on a convex mold; (3) assembling a mold: starting the hydraulic drawing machine and assembling an upper drawing forming mold and a lower drawing forming mold of the drawing forming mold; and (4) quitting: quitting a formed engine oil pan from the drawing forming mold. According to the invention, the yield of the products can reach up to 98%; the parts are slightly scratched; the defects of material friction and uneven material thickness change of a cold stamping die mould can be overcome; the product is free from limiting fracture; the size meets the drawing requirement.

Description

technical field [0001] The invention belongs to the technical field of hydraulic drawing and forming, in particular to a method for hydraulic drawing and forming of an oil pan without a draft angle. Background technique [0002] For turbocharged engine oil pans, there are some product types that are draft-free oil pans, such as figure 1 As shown, if the side wall A has no draft angle, it cannot be stamped and formed by conventional drawing methods, and the purpose cannot be achieved by applying ordinary drawing oil on the surface of the punch and concave mold cavity of the drawing die. Wrinkles and cracks are serious, and the thickness of the material is uneven. Contents of the invention [0003] In order to realize the drawing forming of the oil pan without draft angle and ensure the qualified rate, the present invention proposes a method for hydraulic drawing forming of the oil pan without draft angle. [0004] For this reason, the technical scheme of the present inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D22/20B21D37/18B21D53/84C10M169/04C10N30/06C10N40/24
CPCB21D22/20B21D37/18B21D53/84C10M169/045C10M2201/087C10M2203/1006C10M2207/046C10M2207/122C10M2215/042C10M2219/044C10M2219/068C10N2030/06C10N2030/16C10N2040/24
Inventor 肖峰唐子卫
Owner 湖北凸凹模具科技股份有限公司
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