CN207207221U

CN207207221U - A kind of improved hydraulic press mould

Info

Publication number: CN207207221U
Application number: CN201721208434.6U
Authority: CN
Inventors: 袁名万; 欧福广
Original assignee: SICHUAN LANDE INDUSTRY Co Ltd
Current assignee: SICHUAN LANDE INDUSTRY Co Ltd
Priority date: 2017-09-20
Filing date: 2017-09-20
Publication date: 2018-04-10
Anticipated expiration: 2027-09-20

Abstract

It the utility model is related to a kind of improved hydraulic press mould.Traditional sintered-carbide die processing technology is numerous and diverse, process length；The mechanical property of outer steel shell is also poor simultaneously, and attachment force is also not strong enough between outer steel shell and hard alloy；Also it is exactly that outer steel shell can only be disposable, and needs the auger shell pit on outer steel shell and hard alloy inner core, Cemented Carbide Hardness is higher, and Drilling operation difficulty is larger and easily produces substandard products.Box hat of the present utility model uses mechanical connection form with hard alloy inner core, the two is accurately positioned using the cooperation of concaveconvex structure to realize, and by having female locking nut or being all around fixed around the mould locating sleeve that lock-screw is distributed with, consequently facilitating carrying out compacting molding under the external force effect of hydraulic press.

Description

A kind of improved hydraulic press mould

Technical field

A kind of mould is the utility model is related to, particularly a kind of improved hydraulic press mould.

Background technology

Because sintered-carbide die has high rigidity and excellent wearability, it is widely used in the mould of hydraulic press On, but because poor impact resistance, fragility are big, typically by hard alloy compacting sintering in carbon steel shell.Because of outer steel shell and firmly Matter alloy needs together sintering and Slow cooling at high temperature, and carbon steel shell should aoxidize deformation and outer steel shell at high temperature Interior tissue coarse grains, mechanical property is relative poor, and subsequently using heat treatment also because of the expansion of hard alloy and steel Coefficient is different and can not generally all be after sintering by the way of bulk heat treatmet, and carbon steel shell only carries out Surface hardening treatment, So the mould that the coarse grain of box hat because technological reason is not avoided that, thus causes carbon steel shell combination hard alloy adds Work cumbersome, process length；The mechanical property of outer steel shell is also poor simultaneously；Also it is exactly that outer steel shell can only disposably make With necessarily leading to waste.In addition in the prior art in order to increase the connection between outer steel shell and hard alloy inner core, some technologies Scheme additionally uses the auger shell pit on outer steel shell and hard alloy inner core, is engaged by screw with screw, to lock steel Shell and hard alloy inner core.But because outer steel shell hardness is big, cause drilling difficult, it is difficult to process and outer steel shell can be influenceed With the mechanical strength of hard alloy, substandard products are easily produced in process.

Utility model content

A kind of the shortcomings that the purpose of this utility model is to overcome prior art, there is provided improved hydraulic press mould.

The purpose of this utility model is achieved through the following technical solutions：A kind of hydraulic press die improvement, box hat and hard It is accurately positioned between alloy inner core using the cooperation of concaveconvex structure to realize, box hat outer surface is machined with external screw thread, and its radial direction is used While improved locking nut is to fix outer steel shell also can axial restraint hard alloy inner core, the external screw thread of box hat outer surface It is engaged with the internal thread of locking nut.After fluid die compacting is completed, box hat assembles under external force with hard alloy It is tighter, it is not easy to disassemble., can be respectively in box hat inner surface and hard for the ease of the dismounting of box hat and hard alloy inner core Core outer surface plates one layer of polytetrafluoroethylene film respectively in matter alloy.

Another form of hydraulic die improves, using the cooperation of concaveconvex structure come real between box hat and hard alloy inner core Now it is accurately positioned, is provided with mould locating sleeve below box hat and hard alloy inner core, positioning sleeve surrounding is evenly around being disposed with lock Tight screw, the end of lock-screw are connected with locking push pedal, and lock-screw is coordinated with positioning jacket wall by screw thread, and lock-screw is stretched Entering the length in positioning sleeve can be adjusted.The locking push pedal of lock-screw end pushes against box hat outer wall, the mould combined It can be locked simultaneously on radial and axial.For the ease of the dismounting of box hat and hard alloy inner core, can distinguish Core outer surface plates one layer of polytetrafluoroethylene film respectively in box hat inner surface and hard alloy.

The utility model has advantages below：1st, box hat and hard alloy inner core can be with each adaptive in the mould after improving Suitable technique separately produces, and finally assembles cooperation again, it is not necessary to is sintered at high temperature together, outer steel shell can first carry out heat Handle to refine its interior tissue crystal grain, mechanical property is significantly improved.

2nd, processing technology is simplified, and shortens process.

3rd, outer steel shell need not be drilled again, avoid the damage of defect rate too high in processing and product mechanical performance Lose.

4th, box hat may be reused, and reduce waste.

5th, mould locating sleeve can be adapted with various sizes of mould, can carry out axial direction and footpath to the mould of Multiple Type To positioning.

6th, box hat and hard alloy inner core can be dismounted easily.

Brief description of the drawings

Fig. 1 is hydraulic press mould structure of the prior art；

Fig. 2 is another hydraulic press mould structure in the prior art；

Fig. 3 is a kind of improved hydraulic press mould structure form；

Fig. 4 is another improved hydraulic press mould structure form.

In figure：1- box hats, 2- hard alloy inner cores, 3- screws, 4- improve after box hat, 5- improve after hard alloy in Core, 6- locking nuts, 7- positioning sleeves, 8- lock-screws, 9- locking push pedals, 10- external screw threads.

Embodiment

The utility model is further described below in conjunction with the accompanying drawings, but the scope of protection of the utility model is not limited to It is as described below.

It is traditional mould assembling form as shown in Figure 1, it is by the compacting sintering of hard alloy inner core 2 in carbon steel shell. Because box hat 1 and hard alloy need together sintering and Slow cooling at high temperature, carbon steel shell should aoxidize at high temperature deformation, And outer steel shell interior tissue coarse grains, mechanical property is relative poor, and subsequently using heat treatment also because of hard alloy Different from the coefficient of expansion of steel and can not generally all be after sintering by the way of bulk heat treatmet, carbon steel shell only carries out table Face cure process, so the thick crystal grain of box hat is not avoided that because of technological reason.

Fig. 2 is also mould assembling form commonly used in the prior art, and it is in order to increase between box hat and hard alloy inner core Bonding strength, all open upper screwed hole on box hat and hard alloy inner core, be engaged by screw 3 with screw, to lock steel Shell and hard alloy inner core.But because outer steel shell hardness is big, cause drilling difficult, it is difficult to process and outer steel shell can be influenceed With the mechanical strength of hard alloy, substandard products are easily produced in process.

Embodiment 1

Fig. 3 is improved hydraulic press mould, and it is respectively on the box hat 4 after improvement and the hard alloy inner core 5 after improvement Groove and boss are set respectively, are accurately positioned between box hat 4 and hard alloy inner core 5 using the cooperation of concaveconvex structure to realize. The outer surface of box hat lower end is machined with external screw thread 10, its radial direction with improved locking nut 6 to fix outer steel shell while, also can Enough axial restraint hard alloy inner cores, the external screw thread of box hat outer surface match with the internal thread of locking nut.Moulded in hydraulic pressure After completion, box hat clamps tighter under external force with hard alloy, it is not easy to disassembles.For the ease of box hat and hard The dismounting of alloy inner core, can core outer surface plates a strata tetrafluoroethene respectively in box hat inner surface and hard alloy respectively Film.First box hat and hard alloy inner core are assembled up during use, then will rotate to steel with shell with female nut The lower end of shell and hard alloy inner core is so as to realizing that the two in radial direction and the fixation on axial direction, is attached in this way Box hat is high with hard alloy inner core mechanical coupling strength, mould registration, Bu Huifa during hydraulic press die cast Life comes off or offset, and avoids the punching on die ontology.

Embodiment 2

Fig. 4 is another form of hydraulic press die improvement, using concaveconvex structure between box hat and hard alloy inner core Cooperation is accurately positioned to realize, is provided with mould locating sleeve 7 below box hat and hard alloy inner core, positioning sleeve surrounding evenly around Lock-screw 8 is disposed with, the end of lock-screw is connected with locking push pedal 9, and lock-screw is coordinated with positioning jacket wall by screw thread, The length that lock-screw is stretched into positioning sleeve can be adjusted.The box hat combined is put into mould with hard alloy inner core to determine After in the set of position, rotate four circles the lock-screw surrounded, and regulation lock-screw stretches into the length of mould locating sleeve, until locking screw The locking push pedal for following closely end pushes against box hat outer wall, and the mould combined can be locked on radial and axial simultaneously. The locking push pedal of lock-screw end can be changed, and can be flat type, can also be replaced with pushing away with arc inner wall face Block, so as to be adapted with the shape of box hat outer wall.After hydraulic pressure molding is completed, box hat blocks under external force with hard alloy Dress is tighter, it is not easy to disassembles.For the ease of the dismounting of box hat and hard alloy inner core, can respectively in box hat inner surface and Core outer surface plates one layer of polytetrafluoroethylene film respectively in hard alloy.

Claims

A kind of 1. improved hydraulic press mould, it is characterised in that：Be respectively arranged with its box hat and hard alloy inner core groove with Boss, it is accurately positioned between box hat and hard alloy inner core using the cooperation of concaveconvex structure to realize, mould is also included with interior The locking nut of screw thread, box hat outer surface are machined with external screw thread, diametrically fix the same of box hat with improved locking nut When, also can axial restraint hard alloy inner core, the external screw thread of box hat outer surface matches with the internal thread of locking nut.
2. hydraulic press mould according to claim 1, it is characterised in that：The screw thread process of box hat outer surface is under box hat End.
3. hydraulic press mould according to claim 1, it is characterised in that：Core outer surface in box hat inner surface and hard alloy One layer of polytetrafluoroethylene film is coated with respectively.
A kind of 4. improved hydraulic press mould, it is characterised in that：Be respectively arranged with its box hat and hard alloy inner core groove with Boss, it is accurately positioned between box hat and hard alloy inner core using the cooperation of concaveconvex structure to realize, in box hat and hard alloy Mould locating sleeve is provided with below core, positioning sleeve surrounding is connected with evenly around lock-screw, the end of lock-screw is disposed with Push pedal is locked, lock-screw is coordinated with positioning jacket wall by screw thread, and the length that lock-screw is stretched into positioning sleeve can be adjusted Section.
5. hydraulic press mould according to claim 4, it is characterised in that：The locking push pedal of lock-screw end can be more Change.
6. hydraulic press mould according to claim 4, it is characterised in that：The locking push pedal of lock-screw end is flat board knot Structure.
7. hydraulic press mould according to claim 4, it is characterised in that：The locking push pedal of lock-screw end is with arc The pushing block of shape internal face, its inner surface are adapted with the shape of box hat outer wall.
8. hydraulic press mould according to claim 4, it is characterised in that：Core outer surface in box hat inner surface and hard alloy One layer of polytetrafluoroethylene film is coated with respectively.