CN107059078B

CN107059078B - Local precise tin plating processing technology for metal parts

Info

Publication number: CN107059078B
Application number: CN201710269659.0A
Authority: CN
Inventors: 刘书琦
Original assignee: Dongguan Leader Precision Manufacturing Technology Co Ltd
Current assignee: Dongguan Leader Precision Manufacturing Technology Co Ltd
Priority date: 2017-04-21
Filing date: 2017-04-21
Publication date: 2020-02-18
Anticipated expiration: 2037-04-21
Also published as: CN107059078A

Abstract

The invention discloses a local precise tinning processing technology for metal parts, which is characterized in that a coiled material is subjected to film-covering punching according to a soft pure nickel material required by the parts; the film on the position needing electroplating is subjected to waste discharge through a waste discharge machine; removing the protective film on the electroplating material belt during electroplating; punching the material into a material belt, rolling up the material belt, and then cleaning the material belt; cutting off the blank by an automatic cutting machine, and automatically packaging. According to the invention, the precision of film-coating punching is utilized, the film-coating punching is firstly carried out, and then the electroplating process is carried out, so that the production efficiency is improved, the product yield is improved, and the waste of labor and material cost is reduced.

Description

Local precise tin plating processing technology for metal parts

Technical Field

The invention relates to a local precise tin plating processing technology for metal parts.

Background

At present, a metal part client often requires the whole tin plating on the surface of a product, and the requirement of tin plating boundary size control does not exist, so that the problem of tin plating thickness only needs to be solved in common tin plating, and the client requirement can be met in the electroplating process.

But this time the customer requires local tinning on the metal product surface, there is tinning boundary size control, and the control size requirement is strict (+/-0.1 mm), as shown in fig. 1.

The existing process is used for local tinning, and two schemes are adopted:

the first scheme is as follows: and (3) punching to complete the product structure, and then carrying out local tinning on the surface of the product. The surface which does not need to be plated with tin is required to be shielded by a jig, and only the part which needs to be plated with tin is exposed. But only 3.10 x 2.23 x 0.45(mm) because the product is too small. The shielding jig is well made, but is very difficult to place, even in the size specification, the efficiency is extremely low, the price is high, and the large-batch requirements of customers cannot be met.

The second scheme is as follows: firstly, the product is punched to a forming structure without cutting (namely, the state of a coil stock is maintained), then, the surface is locally tinned, and finally, the product is cut off to finish the process. This solution looks good, but after several trials, the size of the boundary of the local tin plating of the product is too much affected by the fluctuation of the current (after dozens of debugging and verification, the size of the tin plating boundary can only be between plus or minus 0.15 and plus or minus 0.25).

Disclosure of Invention

The technical problem to be solved by the invention is to provide a method for changing the traditional complete electroplating of the material belt into the local electroplating of the material belt, which not only solves the problem of very accurate requirement of local electroplating position of a client product, but also solves the problem of low efficiency of local electroplating of a single product.

The invention is realized by the following technical scheme: a local precise tin plating processing technology for metal parts is characterized in that: the method comprises the following steps:

step one, according to the soft pure nickel material required by the part, the coiled material is subjected to film covering and punching.

And step two, the film on the position needing electroplating is subjected to waste discharge through a waste discharge machine.

And step three, discharging the protective film on the electroplating material belt during electroplating.

And step four, stamping the material belt, rolling up the material belt, and then cleaning the material belt.

And step five, cutting off and blanking by using an automatic cutting machine, and automatically packaging.

As a preferred technical scheme, the method comprises the following specific detailed steps:

film coating: the material roll is coated with the film by a film coating and punching integrated machine, and the film has downward viscosity during film coating and can resist high temperature of 280 ℃.

(II) punching: the material area gets into the tool of surely gluing that punches a hole behind the tectorial membrane, drives the mould by the cylinder on the laminating machine and punches a hole and surely glues, and key management and control is surely glued the position size to 0.05mm carries out the management and control.

(III) waste discharge: the waste discharge process is to tear off the glue that needs to tear off by utilizing the waste discharge device on the laminating machine, and the torn glue is the glue after the die cutting just, and the torn glue has a notch and is torn off according to the notch.

(IV) tin plating: the size of tinning size with the tectorial membrane die-cut is surely glued through the preface and is guaranteed, and the preface is surely glued with 0.05mm management and control, consequently, size can be guaranteed with 0.1mm management and control after the tinning.

(V) discharging waste again: after tinning, the film materials on the two sides of the tinned film are discarded, the whole material belt is exposed, and the film materials are torn to glue and discarded.

Sixth, coil material stamping and cleaning: and (4) completing each process by utilizing the movement of the die on the punch press, rolling after the punching is completed, and cleaning the coil stock.

And (seventhly), cutting off and blanking by using an automatic cutting machine, and automatically packaging, wherein the material belt is a first material belt and a second material belt, and the carrier belt is a double carrier belt.

As a preferred technical solution, the stamping and cleaning process specifically includes folding the protection legs, idling, adjusting, bending, and punching four times.

As a preferred technical scheme, the feeding direction of the material belt is perpendicular to the first carrier belt and the second carrier belt, and the receiving directions of the first carrier belt and the second carrier belt are opposite to each other.

The invention has the beneficial effects that: the invention changes the traditional complete electroplating of the material belt into the local electroplating of the material belt, thereby not only solving the problem of very accurate requirement of local electroplating position of a client product, but also solving the problem of low local electroplating efficiency of a single product.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

Fig. 1 is a schematic view of a structure of a partial tin plating in the prior art.

Fig. 2 is a partial structural schematic diagram after the film covering is completed.

Fig. 3 is a schematic structural view of the punching process.

FIG. 4 is a schematic view of waste discharge by a waste discharge device on a laminator.

FIG. 5 is a schematic view of a structure in a tin plating process.

FIG. 6 is a schematic view after secondary waste.

Fig. 7 is a process flow chart at the time of press cleaning.

Fig. 8 is a feed diagram when cutting the package.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations where mutually exclusive features and/or steps are present.

Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

According to the required material belt electroplating position accuracy of metal parts, the coiled material is firstly coated with a film and punched, then the film of a relevant electroplating area is discarded, finally, the material belt is accurately electroplated, and finally, the coiled material is punched and cut off. The method changes the traditional complete electroplating of the material belt into the local electroplating of the material belt, not only solves the problem of very accurate local electroplating position of a client product, but also solves the problem of low local electroplating efficiency of a single product, and comprises the following specific steps of:

the method comprises the following steps: film-covering punching

1) Film coating

This process was completed by a film lamination and die cutting machine to complete the film lamination, as shown in fig. 2.

2) Die cutting

The material area gets into the tool of surely gluing that punches a hole after the tectorial membrane, drives the mould by the cylinder on the laminating machine and goes up the mould and punch a hole and surely glue, and key management and control surely glue position size to carry out the management and control with 0.05mm, as shown in fig. 3.

Step two: waste discharge

The waste discharge process is to tear off the glue to be torn off by using a waste discharge device on the laminating machine, as shown in fig. 4.

Step three: tin plating and waste discharge

1) Tin plating

The size of tinning size with the tectorial membrane die-cut is surely glued through the preface and is guaranteed, and the preface is surely glued with 0.05mm management and control, consequently, size can be guaranteed with 0.1mm management and control after the tinning. As shown in fig. 5.

2) Waste discharge

And (4) rolling edges after tinning for waste discharge. The tearing glue is completely discarded as shown in fig. 6.

Step four: punching cleaning (coil stock)

The movement of the die on the punch press is used for completing all the processes, and the rolled material is rolled and cleaned after the punching is completed, as shown in fig. 7.

Step five: cut-off package

Cutting off the blank by an automatic cutting machine, and automatically packaging. The carrier tape is a double carrier tape, and the carrier tape is a double carrier tape, as shown in fig. 8.

The invention changes the traditional complete electroplating of the material belt into the local electroplating of the material belt, thereby not only solving the problem of very accurate requirement of the local electroplating position of a client product, but also solving the problem of low local electroplating efficiency of a single product.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.

Claims

1. A local precise tin plating processing technology for metal parts is characterized by comprising the following steps: the method comprises the following steps:

step one, according to a soft pure nickel material required by a part, performing film covering and punching on a coiled material;

step two, the film on the position needing electroplating is subjected to waste discharge through a waste discharge machine;

step three, discharging the protective film on the electroplating material belt after electroplating;

fourthly, punching the material belt, rolling up the material belt, and then cleaning the material belt;

cutting off the blanking by using an automatic cutting machine, and automatically packaging;

the detailed steps are as follows: film coating: the material roll is coated with the film by a film coating and punching integrated machine, and the film has downward viscosity during film coating and can resist high temperature of 280 ℃;

(II) punching: after film covering, the material belt enters a punching and glue cutting jig, an air cylinder on a film covering machine drives a jig upper die to punch and cut glue, the position size of the glue cutting position is controlled in a key mode, and control is carried out in a +/-0.05 mm mode;

(III) waste discharge: the waste discharge procedure is to tear off the glue to be torn off by using a waste discharge device on the film laminating machine, wherein the torn off glue is the glue which is just cut by a die and is provided with a notch, and the glue is torn off according to the notch;

(IV) tin plating: the tinning size is guaranteed by the glue cutting of the pre-working procedure according to the size of the film punching, and the glue cutting of the pre-working procedure is controlled by +/-0.05 mm, so that the size can be guaranteed by +/-0.1 mm after tinning;

(V) discharging waste again: after tinning, discharging waste of the film materials on the two sides of the tinned film material to expose the whole material belt, and finishing glue tearing and waste discharging;

sixth, coil material stamping and cleaning: completing all processes by utilizing the movement of a die on a punch press, rolling after the punching is completed, and cleaning a coil stock;

2. The local precise tin plating processing technique of the metal part as claimed in claim 1, characterized in that: the punching and cleaning process specifically comprises the steps of folding the protection pins, idling, adjusting, bending and punching for four times.

3. The local precise tin plating processing technique of the metal part as claimed in claim 1, characterized in that: the feeding direction of the material belt is perpendicular to the first carrier belt and the second carrier belt, and the receiving directions of the first carrier belt and the second carrier belt are opposite to each other.