CN102319976B - Method for processing locating hole of product locating piece in forming mould - Google Patents

Abstract

The invention relates to a processing method for a positioning hole of a product positioning part in a forming die, and relates to the technical field of processing the positioning hole of a product positioning part in a forming die. In this method, first make a small hole smaller than the final hole at the approximate position of the positioning piece, then make a stepped pin and press it into the positioning hole of the mold body, then fix the positioning piece at the correct position with the connecting piece, and then glue the epoxy resin mixture Fill in the gap between the positioning piece and the stepped pin. After the colloid is completely dry, remove the positioning piece, align the hole made by the mixed plastic, and expand and bore the required positioning hole. The invention can quickly remove the position of the positioning hole of the positioning part that needs to be repaired from the mold body without damaging the bottom hole of the mold body, avoiding the reprocessing of the mold, shortening the repair time of the mold, and improving labor productivity.

Description

A processing method for positioning holes of product positioning parts in forming molds

technical field

The invention relates to the technical field of processing positioning holes of product positioning parts in forming molds.

Background technique

Due to the long-term use of many forming dies at present, most of the positioning holes, mounting holes and positioning surfaces of the product positioning parts have been worn out, and the positioning parts need to be replaced. In order to ensure the airtightness of the mold body, the positioning holes on one side of the forming template must be in the form of blind holes during manufacture. Due to frequent product changes, these positioning parts often need to be remanufactured. Most of the forming templates have a hyperboloid structure on one side. The original manufacturing is based on mold lines and templates, so the positioning holes of the remanufactured positioning parts , cannot be coordinated with the original phantom (concentric), and cannot guarantee the use requirements of the product. How to return the positioning hole to the positioning piece without damaging the surface of the phantom is a considerable problem.

The method generally adopted at present is: abandon the original hole and re-make the positioning hole with the positioning part at the same time. After several changes and repairs, the mold body is already full of holes, so the mold body has to be reprocessed. This not only causes unnecessary waste, but also prolongs the rework time of the mold.

Contents of the invention

The purpose of the present invention is:

The purpose of the present invention is to provide a method that can return the position of the positioning hole in the mold body to the positioning member without destroying the mold body. At the same time, the present invention can reduce the repeated processing of the mold and shorten the repair time of the mold. Improve labor productivity.

Technical scheme of the present invention is:

The invention provides a method for rapidly and safely returning the positioning hole of the mold body to the positioning piece. This method comprises the following steps:

The first step is to manufacture the shape of the positioning part according to the mold line and the template;

The second step is to pre-install the positioning part at the corresponding position of the forming mold body, and draw the approximate position of the corresponding positioning hole on the positioning part;

The third step is to drill an adapter hole at least 5mm smaller than the diameter of the final hole on the positioning part according to the marked position;

The fourth step is to manufacture a positioning step pin, the outer diameter of one side is excessively fitted with the positioning hole diameter of the mold body, and the outer diameter of the other side is at least 6mm smaller than the diameter of the transfer hole;

The fifth step is to apply lubricating oil on the side of the step pin that is not pressed into the mold body;

The sixth step is to press the step pin into the mold body, and then fix the positioning piece on the mold body in the correct position;

The seventh step is to fill the epoxy resin mixture between the positioning piece and the step pin;

The eighth step, after the glue is completely dry, remove the positioning piece, find the center of the positioning hole formed by the mixed glue, and expand the hole to the final hole.

The advantages of the present invention are:

The invention can quickly remove the position of the positioning hole of the positioning part that needs to be repaired from the mold body without damaging the bottom hole of the mold body, avoiding the reprocessing of the mold, shortening the repair time of the mold, and improving labor productivity.

Description of drawings

Accompanying drawing 1 is the schematic diagram when this method is implemented, and wherein, 1 is a stepped pin, 2 is epoxy resin mixed glue, 3 is a positioning piece, 4 is a mold body.

Detailed ways

The specific implementation of this method is: first make a small hole smaller than the end hole at the approximate position of the positioning piece, then make a stepped pin and press it into the positioning hole of the mold body, then fix the positioning piece at the correct position with the connecting piece, and then Fill the gap between the positioning piece and the stepped pin with epoxy resin mixture. After the glue is completely dry, remove the positioning piece, align the hole made by the mixture, and expand and bore for the required positioning. hole. It is required that the cooperation between the pin used and the positioning hole of the mold body must be excessively matched, and the mixed glue must be fully filled.

An example of this method is as follows: For example, in the production process of the side wall positioning part of a certain model, the thickness of the positioning part is 16mm, the width is 45mm, and the length is 120mm. There are two D20H7 holes for positioning with the forming mold body, and the corresponding positioning holes on the mold body are D10H7. Its positioning method includes the following steps:

The first step is to manufacture the shape of the positioning part according to the mold line and the template;

The second step is to pre-install the positioning part at the corresponding position of the forming mold body, and project the approximate position of the corresponding positioning hole on the positioning part;

The third step is to drill the D15 hole according to the marked position;

Step 4: Make a positioning step pin with an outer diameter of D10r6 on one side and D8h7 on the other side;

Step 5: Apply lubricating oil to the side of step pin D8h7;

Step 6: Press the step pin into the mold body, and then fix the positioning piece on the mold body at the correct position;

Step 7: Fill the epoxy resin mixture between the positioning piece and the step pin;

Step 8: After the glue is completely dry, remove the positioning piece, find the center of the circle according to the D8h7 hole, and expand the hole to D20H7 hole.

Claims (1)

1. the processing method of product orientation part locating hole in the shaping mould is characterized in that this method may further comprise the steps:

The first step has been made the keeper profile by loft, model;

In second step, keeper is pre-installed in moulding die body relevant position, and corresponding locating hole Position Approximate groove throwing is drawn on the keeper;

The 3rd step, by the scribing position system of on keeper, boring than the final bore dia switching hole of 5mm extremely when young;

The 4th step, make a positioning step pin, a side external diameter is located the aperture for excessively to cooperate with die body, and the external diameter of opposite side is than the bore dia 6mm extremely when young that transfers;

In the 5th step, be coated with lubricating oil in non-die body one side that is pressed into of step pin;

The 6th step was pressed into die body with the step pin, keeper was fixed on the die body by the tram again;

The 7th step, filling epoxy resin epoxy glue between keeper and step pin;

The 8th the step, treat the glue finish-drying after, keeper is taken off, look for the center of circle by the locating hole of epoxy glue institute moulding, and final hole expanded as in the hole.

Images