CN1107562C

CN1107562C - Technology for manufacturing helicoid of sealer for steel drum as package container

Info

Publication number: CN1107562C
Application number: CN00112036A
Authority: CN
Inventors: 张有龙
Original assignee: GULI METAL WARES FACTORY NANJING CITY
Current assignee: GULI METAL WARES FACTORY NANJING CITY
Priority date: 2000-01-19
Filing date: 2000-01-19
Publication date: 2003-05-07
Anticipated expiration: 2020-01-19
Also published as: CN1305875A

Abstract

The present invention relates to new technology for processing screw rings of a steel barrel sealing device for a packaging container, which comprises the steps: preparing materials, drawing, cutting an upper end opening cover, leveling a flange and a chamfer angle of the inner opening surface at the upper end and extruding an inner diameter of a flanging edge. The present invention is characterized in that 0.4 to 0.5mm of patterns are distributed on the inner wall which is knurled, the stress caused by drawing is eliminated, and thus, the wrinkles on the inner wall are leveled; a chamfer angle of the inner diameter at the upper end of the drawing wall is used for supplying the materials to the transition part of a circular angle on the outer wall of the upper end surface, and the materials whose hole expansion inner diameter required by the flanging edge is removed are filled in inner threads whose lower part needs to be processed; the inner threads processed by a roller cause the inner diameter of threads to reduce the dimension requirement of the threads.

Description

A kind of new technology of packaging container steel bucket sealer helicoidal processing

Technical field

The invention belongs to the cold processing technique field, specifically a kind of new technology of packaging container steel bucket sealer helicoidal processing

Background technology

The packaging container steel bucket sealer helicoidal of China's production at present is a kind of tubular drawn component of flanged pin part.Its products characteristics is that flange portion is smooth, and it is vertical with the sidewall that draws, after drawing the removal of wall upper end cover, the wall upper surface is smooth, not allowing to keep outer wall that Yin Layan causes has the defective of knuckle, the top of drawing wall requires flanging volume circle, wall thickness requires at 0.9-1mm, internal orifice needs 0.3 * 45 ° of chamfering, the lower part of drawn component is by the tapping machine machining internal thread, wall thickness requires (to see GB13251-91) about 2.7mm, is the part that 2.75-3mm produces 4 kinds of different sizes of this series so steel plate thickness is all selected by the present manufacturing firm of China; Usually the technology that adopts is that the steel plate blanking draws, and cuts upper end cover, the smoothing flange portion, car draws the wall upper surface, and till outer wall did not have knuckle, car bead portion internal diameter made it wall thickness at 0.9-1mm, and 0.3 * 45 ° of chamfering of car, on tapping machine, use the screw tap screw cutting.Because the crimping internal diameter adopts the method production of machining, and deviation ratio is bigger up and down for the internal diameter size after the cutting, along with the steel of different components and hardness are also inequality to the Selection of Cutting of cutting usefulness, bring influence to batch process, particularly be subjected to the influence of roughness, rubber seal on the plug screw and the surface engagement behind the crimping cause the rubber seal grinding cracks easily in actual use, in the screw tap cutting internal thread, often because material changes, screw tap can not adapt to the production needs, often cause screw thread agomphosis band tooth, product rejection, producing cost is higher, the roughness of screw thread, intensity is difficult to reach requirement, and the fit clearance instability between the plug screw screw thread, thereby in use cause tolerant leakage easily.

Summary of the invention

The objective of the invention is to avoid above-mentioned weak point of the prior art and provide a kind of when the Production and Packaging container steel bucket sealer helicoidal, adopt annular knurl on the inwall, the machining of crimping inner-diameter portion whose is changed into employing forcing press cold-extruded mode produce, the screw tap cutting is changed into the new technology of rolling screw thread.Present bead portion and screw thread roughness are brought up to

More than, having overcome the phenomenon that cracks behind the crimping service life of having improved sealing ring, productivity effect improves more than 6 times.

Purpose of the present invention can reach by following measure:

A kind of new technology of packaging container steel bucket sealer helicoidal processing, this technology comprises that blanking draws, cut upper port cover, smoothing flange and upper end internal orifice surface chamfer, extruding crimping inner-diameter portion whose, it is characterized in that being covered with the 0.4mm-0.5mm decorative pattern on the inwall behind the annular knurl, eliminate and draw the stress that causes, make inwall wrinkling be able to smooth; The chamfering that the wall upper-end inner diameter is drawn in utilization adds to upper surface outer wall round-corner transition part to material, and the material that the required reaming internal diameter of bead portion is removed is filled into the required machining internal thread part in lower part; The rolling machining internal thread makes the internal diameter of threaded portion narrow down to the thread size requirement.

The present invention has following advantage compared to existing technology:

1, production technology is simplified, and production efficiency improves.

(technology is that blanking draws to new technology by adopting the processing of a kind of steel bucket sealer helicoidal, cut upper end cover, smoothing flange and upper end internal orifice surface chamfer, the inwall annular knurl, extruding crimping inner-diameter portion whose, the rolling internal thread), now utilize the frock forcing press to produce to substitute cutting on the lathe, production efficiency improves (because the number of strokes of forcing press per minute is more than 2 times of lathe feed) more than 2 times, now utilize roller mill production to substitute the cutting of tapping machine, productivity effect improves (number of strokes of thread roller milling train is more than 4 times of tapping machine cutting) more than 4 times, and prior one side is to have avoided owing to different cutters are selected in every batch steel composition variation, the trouble that screw tap brought needs the different cutters of grinding repeatedly with operating personnel, the worry of screw tap shape.

2, improve the quality, reduce production costs.

By adopting a kind of new technology of steel bucket sealer helicoidal processing, the roll out material of limit part wall thickness and the material of screw tap cutting of former upper surface material of sending a car and car fully utilized, be reduced to thick steel plate replacement by the original necessary thick steel plate of 2.75-3mm with 2.2mm, now produce in addition the material requested blank the spread material reduced 3mm, make it raw-material consumption aspect and saved 17%.Calculate at 5,000,000 as selling a steel bucket sealer helicoidal at present year by certain enterprise, can increase the benefit more than 500,000 yuan, simultaneously, because of adopting moulds of industrial equipment production, product size is stable, and especially the roughness of bead portion and screw thread is by original Below bring up to

More than, not having sealing ring when rubber seal and bead portion fitted seal scratches with the squeeze crack phenomenon and produces, avoided the in use tolerant leakage phenomenon of user fully, improved the service life of rubber seal, owing in the rolling threaded process flow harden effect is arranged, thereby having improved the intensity of screw thread greatly, screw thread is fuller, and is better with the cooperation that cooperates between the plug screw screw thread.

The present invention is applicable to the production of TG2, the TG3/4 of packing container sealer for steel drum, TM60 * 2, TM27 * 2 bung flanges.

The specific embodiment

The concrete production technology of the present invention is as follows:

1, blanking draws: tool structure is that blanking draws compound die, at first sheet material is carried out circular of punching; Along with the continuation of patrix is descending, draw die and draw punch insert is drawn into flanged pin shape to the circular block after die-cut tube shape, draw the charging radius R of die, generally select between the radius R 6-R9 according to the material of different steel plates, generally select between the radius R 3-R5 for the expectation R radius that draws protruding core, should select minimum as far as possible for the expectation R radius that draws protruding core, with not the R part material attenuate of actinal surface on the tubular piece or crackle occurs and be as the criterion, the R of outer wall will be reduced, make that the internal diameter outer bevel operation before the later process utilization extruding will be useful to replenishing of outer wall R part material.

2, cut upper port cover: the internal diameter size of the upper surface of the flanged pin tubular piece after drawing by drawn component cut upper end cover.

3, smoothing flange and upper end internal orifice surface chamfer: the principle of this procedure is: the flange portion to part is smoothed, make flange with draw after the radius R 6-R9 of outer wall charging aperture after smoothing, meet the requirement of the required R0.3-R0.5 of final part, simultaneously also this part drawn upper end internal orifice on the wall towards outer chamfering, because mould is to the external diameter that draws wall and the control of internal diameter, so the material of upper end internal orifice after the outer chamfering is filled into the required liftout R of the protruding core of Yin Layan, inwardly there is R and cause on the drawn component actinal surface outer wall also to produce simultaneously, can guarantee that like this outer wall of drawn component is vertical with flange, guide effect is provided also for the internal diameter extruding of next procedure, required 0.3 * 45 ° of-0.5 * 45 ° of chamfering in the time of also satisfying this part upper port crimping simultaneously.

4, annular knurl on the inwall: according to the difference of material, with the knurling tool of 0.4-0.5mm, annular knurl on the bung flange inwall, the degree of depth reaches requirement on levelling machine, is in order to eliminate stress and the fold that last process produces, to be convenient to the processing of next procedure.

5, extruding crimping inner-diameter portion whose: the principle of this operation be to this part under the constant situation of external diameter, internal diameter to the upper end bead portion of this tubular piece enlarges, make and satisfy the bead portion wall thickness, and the redundance material after the internal diameter expansion is pushed to the lower end, be filled into the internal diameter of lower part, make the wall thickness of end portion thicken, so that reach the required bottom outlet size of machining internal thread.

6, machining internal thread: rolling internal thread on roller mill, under the constant situation of external diameter, the effective tooth that guarantees screw thread is 3 teeth half, threaded portion accounts for 56% of whole bung flange height, the thickness of threaded portion is 2.7mm, the effective thickness of threaded outer wall with require flanging volume circle wall thickness identical, rolling rear thread tail tooth does not exceed flange surface.

Claims

1, a kind of new technology of packaging container steel bucket sealer helicoidal processing, this technology comprises that blanking draws, cut upper port cover, smoothing flange and upper end internal orifice surface chamfer, extruding crimping inner-diameter portion whose, it is characterized in that carrying out annular knurl on the inwall after described smoothing flange and the upper end internal orifice surface chamfer technology, be covered with the 0.4-0.5mm decorative pattern on the inwall behind the annular knurl, carry out described extruding crimping inner-diameter portion whose technology on the inwall after the annular knurl technology, carry out the rolling machining internal thread afterwards, make the internal diameter of threaded portion narrow down to the thread size requirement.

2, the new technology of packaging container steel bucket sealer helicoidal processing according to claim 1 is characterized in that the knurling tool annular knurl on the bung flange inwall with 0.4-0.5mm.

3, the new technology of packaging container steel bucket sealer helicoidal processing according to claim 1, the effective tooth that it is characterized in that screw thread is 3 teeth half, threaded portion accounts for 56% of whole bung flange height, the thickness of threaded portion is 2.7mm, the effective thickness of threaded outer wall with require flanging volume circle wall thickness identical, rolling rear thread tail tooth does not exceed flange surface.