CN102416426A

CN102416426A - Method for adjusting notch depth of easy-to-open cover

Info

Publication number: CN102416426A
Application number: CN2011102268980A
Authority: CN
Inventors: 金丽秋; 汪伟; 蔡慧
Original assignee: China Jiliang University
Current assignee: China Jiliang University
Priority date: 2011-08-02
Filing date: 2011-08-02
Publication date: 2012-04-18

Abstract

The invention relates to a method for fine adjustment of notch depth of an easy-to-open cover. The easy-to-open cover structurally comprises a lower mold (2), an easy-to-open cover blank (Q) arranged on the upper part of the lower mold (2), an electric heating coil (3) wound on the periphery of the lower mold (2), and an upper mold (1) arranged in space on the easy-to-open cover blank (Q). The method is characterized in that: the height (H) of the lower mold (2) is fine-adjusted according to expansion of the lower mold (2) in the vertical direction due to heating of the electric heating coil (3) wound on the periphery of the lower mold (2), that is, the depth (h') of a notch (V) on the easy-to-open cover blank (Q) is formed via controlling a bottom cutter mold (W) of the upper mold (1) to punch the easy-to-open cover blank (Q) based on the fine adjustment of the height (H). Since the depth (h') of the notch (V) on the easy-to-open cover blank (Q) is controlled based on metal expansion and contraction characteristics, conditions can be provided for the fine adjustment of the depth (h') of the notch (V) on the easy-to-open cover blank (Q).

Description

The method of adjustment of easy-open end width of nick

Technical field

The present invention relates to the technology of easy-open end width of nick fine setting.

Background technology

The easy-open end width of nick is the key factor that influences the easy-open end product quality; Mainly hard gasket (for example: adopt the metallic copper pad) or its displacement method of manual adjustments realize through between counterdie and substrate, increasing in the adjustment of easy-open end width of nick at present; Its deficiency is: need give to produce continuously and bring inconvenience through shutting down the above-mentioned condition of accomplishing.

Summary of the invention

The present invention's purpose: for addressing the above problem the method for trimming of the easy-open end width of nick that proposes.

In order to realize goal of the invention, intend the technology below adopting:

A. the present invention structurally comprises: counterdie, be positioned at easy-open end lid base directly over the counterdie, around the peripheral electrically-heated coil of counterdie be positioned at the patrix of easy-open end lid base superjacent air space;

It is characterized in that:

B. method for using of the present invention: the height of described counterdie is through the electrically-heated coil that is wound on the counterdie periphery counterdie to be carried out eddy-current heating to cause the degrees of expansion of counterdie generation vertical direction to adjust, and promptly controls patrix bottom cutting die through the inching of this height and causes this easy-open end to cover the degree of depth of indentation on base towards carving when easy-open end covers base.

The present invention and prior art characteristics relatively:

Because the present invention has adopted the fine setting of the characteristic of expanding with heat and contract with cold of metal being controlled the degree of depth of indentation on the easy-open end lid base, this is just for realizing that easily the easy-open end width of nick finely tunes the condition of having created.---accomplish the fine setting (microdisplacement) of distance up and down through cold and hot adjusting under the situation that can when producing continuously, need not to shut down.

Description of drawings

Illustrated embodiments of the invention.

1: patrix; 2: counterdie; 3: electrically-heated coil; 4: temperature-sensing element; Q: easy-open end lid base; W: cutting die; V: indentation; A: thermoregulating system; P: substrate; S: the ring footpath of indentation place circle; H: the height of counterdie; H: the cutting die degree of depth; H ': width of nick; U: voltage.

The specific embodiment

As shown in the figure, critical component of the present invention be exactly the counterdie 2 that is positioned at substrate P top (for example: its diameter is 68mm, and height H is 40mm---it is to be 10.95 * 10 by linear expansion coefficient ⁶The Cr12 of l/K becomes as material); The variation of its height H (quite small---on the magnitude of micron) is that the temperature that the feedback of counterdie 2 temperature values that record according to temperature-sensing element 4 through thermoregulating system A decides the voltage U that offers electrically-heated coil 3 to change counterdie 2 is accomplished fully, promptly finally accomplishes the fine setting (microdisplacement) of upper and lower displacement through cold and hot adjusting.

After the height H of counterdie 2 was confirmed, the numerical value of the degree of depth h ' of the indentation V on the easy-open end lid base Q also just had been determined.---the distance of patrix 1 downward punching press (displacement) is a steady state value, and therefore, the numerical value of the degree of depth h ' of the indentation V on the easy-open end lid base Q is to be determined by the shift length that counterdie 2 vertical direction are expanded with heat and contract with cold.

Obviously, method key point of the present invention is: be the degree of depth h ' that confirms indentation V on the easy-open end lid base Q through the upwards microdisplacement of counterdie 2 fully, and the indentation V degree of depth h ' of reality can be less than or equal to the degree of depth h of cutting die W.

For example: counterdie 2 height H are 40mm; When thermoregulating system A gives counterdie 2 heating through electrically-heated coil 3; Temperature fluctuation range is in the time of 30 ℃ to 50 ℃; The fine setting scope of counterdie 2 height H is between 10 μ m, and the fine setting scope of the degree of depth h ' of the indentation V of the present invention just on easy-open end lid base Q is at least between 10 μ m, again because the indentation V degree of depth h ' on the easy-open end lid base Q is cutting die W by patrix 1 bottom dashes and carve easy-open end lid base Q and cause; The degree of depth h of cutting die W is 0.5mm, and the degree of depth h ' of indentation V can be 90 μ m.

Related data as for other less important executive components that relate to key position of the present invention is following:

General desirable its ring footpath of cutting die W of the present invention S is 66mm (less than the diameter of counterdie 2), and such ring footpath S cutting die W ring footpath S that is positioned at the ring-type indentation V on the easy-open end lid base Q that carves is in full accord.

Coiling distance during the peripheral coiling electrically-heated coil 3 of counterdie 2 can not surpass the height H of counterdie 2, and for example: its distance is 30mm, and coil turn is 6 circles.

Claims

1. the method for trimming of easy-open end width of nick,

A. structurally comprise: counterdie (2), be positioned at easy-open end lid base (Q) directly over the counterdie (2), around the peripheral electrically-heated coil (3) of counterdie (2) be positioned at the patrix (1) that easy-open end covers base (Q) superjacent air space;

It is characterized in that:

B. method for using: the height (H) of described counterdie (2) is to adjust through around the peripheral electrically-heated coil (3) of counterdie (2) counterdie (2) being heated the degrees of expansion that causes counterdie (2) that vertical direction takes place, and promptly controls patrix (1) bottom cutting die (W) through the adjustment of this height (H) and dashes and cause when carving easy-open end lid base (Q) this easy-open end to cover the upward degree of depth of indentation (V) (h ') of base (Q).