CN2792641Y

CN2792641Y - Mould with float mould core structure

Info

Publication number: CN2792641Y
Application number: CN 200520072263
Authority: CN
Inventors: 匡余华
Original assignee: 南京工业职业技术学院
Priority date: 2005-06-02
Filing date: 2005-06-02
Publication date: 2006-07-05

Abstract

The utility model discloses a mould with simple operation and with float mould core structure. The mould comprises a mould core, a male mould, a female mould. A positioning sleeve, a guide post, a supporting plate, a discharging plate and a spring, wherein the guide post is fixed on a frame; the supporting plate is sheathed on the guide post, and can slide upwards and downwards along the guide post; the spring which can cause the supporting plate to slide upwards along the guide post is arranged on the guide post; one end of the mould core is vertically arranged on the supporting plate, and is fixed by the positioning sleeve; the male mould and the discharging plate are arranged on a bracket which can be lifted up and fallen down, and are positioned at the upper part of the mould core; the female mould which is matched with the male mould is fixed on the frame, and is positioned below the mould core. The mould of the utility model effectively solves the problem of low strength of a mould core of the general circular pipe punching mould, and extends the service life of the mould. The utility model is especially suitable for punching and processing for circular pipes with thin walls.

Description

Mould with unsteady mold insert structure

One, technical field

The utility model relates to a kind of machining equipment, specifically a kind of mould with unsteady mold insert structure that is used for tubing processing.

Two, background technology

The processing in thin-wall circular tube hole is the difficult point of machining always, and the object of processing not only intensity is low, and machined surface is a curved surface simultaneously.

The processing method that adopts has at present: machining, mould stamping-out.Then burr is big to adopt machining, remove the burr difficulty, and workload is very big.Adopt conventional mould stamping-out, then the Workpiece structure shape is had a requirement, can not be too big as workpiece hole, otherwise mould punch, strength of concave mould be affected, thus influence the service life of mould, especially true when the stamping-out square hole.

Three, summary of the invention

The purpose of this utility model provides a kind of mould with unsteady mold insert structure.This mould adopts the core rod that floats, and has solved the low problem of general hole punching on circular duct mould core rod intensity effectively, has prolonged the service life of mould.

The purpose of this utility model is achieved through the following technical solutions:

A kind of mould with unsteady mold insert structure, it is characterized in that: it comprises core rod, punch, die, positioning sleeve, guide pillar, support plate, stripper and spring, guide pillar is fixed on the frame, support plate is sleeved on the guide pillar and can slides up and down along guide pillar, and support plate is arranged on the guide pillar along the spring that guide pillar upwards slides; One end of core rod is vertically mounted on the support plate and by positioning sleeve to be fixed; Punch and stripper all are arranged on the liftable support and are positioned at the top of core rod, and the die that matches with punch is fixed on the frame and is positioned at the below of core rod.

The utility model is provided with holddown spring at the stripper place, and this holddown spring can be pressed on stripper on the workpiece to be processed, has guaranteed machining accuracy.Punch adopts oblique sword cutting edge, has reduced blanking pressure, has reduced the distortion of hollow circular-tube stamping-out.

The utility model should correctly be installed by its status requirement when assembling, and error guarantees that within tolerance it is flexibly movable to answer between the parts of motion mutually, and workpiece is indeformable when guaranteeing stamping-out, and simultaneously easy to operate, die life is long.

The utility model has adopted the mould structure of unsteady core rod, and compared with prior art, its advantage is: 1, when stamping-out macropore, square hole, the intensity of punch, die is improved, and has prolonged the service life of mould; 2, owing to adopted special mould structure, reduced blanking pressure, be out of shape when having reduced stamping-out.The utility model is specially adapted to also can use in the punching processing of other tubing in the thin-wall circular tube punching processing, and unsteady core rod can be according to the shape configuration of tubing to be processed.

Four, description of drawings

Accompanying drawing is a structural representation of the present utility model.

Five, the specific embodiment

A kind of mould with unsteady mold insert structure described in the utility model comprises core rod 1, punch 2, die 3, positioning sleeve 4, guide pillar 5, support plate 6, stripper 7 and spring 8.Guide pillar 5 is fixed on the frame, and support plate 6 is sleeved on the guide pillar 5 and can slides up and down along guide pillar 5, and spring 8 also is sleeved on the guide pillar 5 and between support plate 6 and guide pillar 5, can upwards slides along guide pillar 5 in spring 8 effect lower support plate 6.One end of core rod 1 is vertically mounted on the support plate 6 and by positioning sleeve 4 and fixes; Punch 2 and stripper 7 all are arranged on the liftable support and are positioned at the top of core rod 1, and the die 3 that matches with punch 2 is fixed on the frame and is positioned at the below of core rod 1.

When making combustion tube, adopting wall thickness is 1 millimeter, and material is the Q195A ratio-frequency welded tube, and institute is a ventilation window towards square hole, air inlet during the control gas-fired, this square hole size more greatly 22.9 * 20, and pore diameter is φ 23.

During punching, core rod 1 is fixed on the support plate 6, and support plate 6 can slide up and down along guide pillar 5 under the effect of spring 8.After workpiece inserted core rod 1, lifting support was descending, and stripper 7 at first contact with workpiece, and workpiece was glided with unsteady core rod 1 contact with die 3, along with the continuation of patrix is descending, compressed time in the effect of stripper 7 and die 3, and punch 2 is gone out square hole.Last lifting support is up, and core rod 1 leaves die 3 under the effect of spring 8 unsettled, takes out workpiece.

In the present embodiment, core rod requires hardness reasonable.According to the stressing conditions of core rod, the hardness of core rod should be between HRC55-57.Hardness is too high, fractures easily, and hardness is too low, is easy to generate the angle, garden at sharp corner, and the punching burr is strengthened.Material can be used: LD, Cr12MoV.Stripper not only plays discharging and binder at this, also plays die simultaneously, therefore, stripper should have enough hardness (HRC50-52, CrWMn); Simultaneously, the gap that stripper cooperates with punch should be greater than 8%t, and the gap is big, and burr is big after the blanking.Punch structure adopts optimal design, because this mould structure is special, the shape of punch cutting edge just directly determines the life-span of mould and the quality of blanking part, and punch can adopt oblique sword cutting edge.

Claims

1, a kind of mould with unsteady mold insert structure, it is characterized in that: it comprises core rod (1), punch (2), die (3), positioning sleeve (4), guide pillar (5), support plate (6), stripper (7) and spring (8), guide pillar (5) is fixed on the frame, support plate (6) is sleeved on guide pillar (5) and goes up and can slide up and down along guide pillar (5), and support plate (6) is arranged on the guide pillar (5) along the spring (8) that guide pillar (5) upwards slides; One end of core rod (1) is vertically mounted on support plate (6) and goes up and fixed by positioning sleeve (4); Punch (2) and stripper (7) all are arranged on the liftable support and are positioned at the top of core rod (1), and the die (3) that matches with punch (2) is fixed on the frame and is positioned at the below of core rod (1).

2, the mould with unsteady mold insert structure according to claim 1 is characterized in that: locate to be provided with holddown spring (9) at stripper (7).

3, the mould with unsteady mold insert structure according to claim 1 is characterized in that: described core rod (1) adopts the oblique sword cutting edge that can reduce blanking pressure.