Novel limiting device for powder forming

Abstract

The utility model relates to a novel powder forming limiting device which comprises a push-pull oil cylinder, a lower cushion block, a sliding rail, an upper cushion block and a lower oil cylinder height adjusting mechanism, the lower oil cylinder height adjusting mechanism is installed below a lower extending rod of the lower oil cylinder, the upper cushion block is installed at the lower end of the lower extending rod of the lower oil cylinder, and the lower oil cylinder height adjusting mechanism comprises a supporting plate. The sliding rail is installed on the supporting plate, the lower cushion block is installed on the sliding rail in a sliding mode, the push-pull oil cylinder is installed on one side of the supporting plate, the telescopic end of the push-pull oil cylinder is connected with one side of the lower cushion block, the upper end face of the lower cushion block is designed to be an upper inclined face sinking away from one side of the push-pull oil cylinder, and the lower end face of the upper cushion block is designed to be a lower inclined face. And the lower inclined surface is in beveled fit with the upper inclined surface. The utility model has the advantages that the two stress contact surfaces of the upper cushion block and the lower cushion block are inclined surfaces smaller than 4 degrees, so that under the condition of external load pressure, when the lower cushion block laterally leaves the upper outer carrier, the vibration caused by sudden leaving is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to powder press field, concretely relates to a novel limit device of powder forming. BACKGROUND

[0002] In powder forming, the crack of powder parts is one of the reasons of part crack, in addition to the uneven density and the elastic deformation of the mold. When the powder structure part with shoulder of the female mold is processed and formed in the past powder press, the vibration caused by opening the lower support pad before pulling down the female mold to demold after part forming;

[0003] The traditional force support of the female mold is to install the pad block at the lower end of the lower extension rod of the lower oil cylinder, and the upper end surface of the pad block and the force surface of the lower end of the lower extension rod are often perpendicular to the acting force. However, when the lower support pad needs to be laterally away from the vertical external load, the vibration will be caused by the sudden departure of the support force, and the vibration of the mold frame and the mold will be caused by the instantaneous release of the external load. SUMMARY

[0004] In order to solve the above technical problems, the utility model provides a novel limit device of powder forming, which is ingenious in design, reasonable and compact in structure, and solves the vibration problem caused by opening the lower support pad before pulling down the female mold to demold after part forming.

[0005] The technical scheme of the utility model:

[0006] A novel limit device of powder forming, the powder forming hydraulic machine includes a lower oil cylinder, the lower oil cylinder is a double shaft extension cylinder, the lower end of the lower extension rod of the lower oil cylinder is provided with a limit device, which comprises a push-pull oil cylinder, a lower pad block, a slide rail, an upper pad block and a lower oil cylinder height adjusting mechanism, the lower oil cylinder height adjusting mechanism is installed below the lower extension rod of the lower oil cylinder, the lower end of the lower extension rod of the lower oil cylinder is provided with the upper pad block, the lower oil cylinder height adjusting mechanism comprises a support plate, the slide rail is installed on the upper surface of the support plate, the lower pad block is slidably installed on the upper surface of the slide rail, the push-pull oil cylinder is installed on one side of the support plate, the telescopic end of the push-pull oil cylinder is connected to one side of the lower pad block, the upper end surface of the lower pad block is designed as an upper inclined surface which is sunken away from the side of the push-pull oil cylinder, the lower end surface of the upper pad block is designed as a lower inclined surface, and the lower inclined surface is obliquely cut with the upper inclined surface.

[0007] The inclination angle of the upper inclined surface is 4 degrees.

[0008] The push-pull oil cylinder is provided with a front proximity switch and a rear proximity switch on one side, the front proximity switch and the rear proximity switch are respectively installed on the support plate, and a certain interval is left between the front proximity switch and the rear proximity switch; the lower pad is provided with a horizontal plate and a bump on one side, one end of the horizontal plate is installed on one side of the lower pad close to the rear end, the other end of the horizontal plate is located on the rear side of the lower pad, the other end of the horizontal plate is provided with the bump, and the bump cooperates with the front proximity switch and the rear proximity switch.

[0009] The lower oil cylinder height adjusting mechanism further comprises a worm wheel, a worm, a driving motor, a lifting sleeve, a support sleeve and a support base, the support sleeve is installed at the lower end of the support plate, the support base is installed at the lower end of the support sleeve, the lifting sleeve is installed in the support sleeve, external threads are designed on the outer side of the lifting sleeve, internal threads are designed on the inner side of the worm wheel, the worm wheel is rotatably installed on the outer side of the lifting sleeve and can be rotatably located at the middle position of the support sleeve, the worm is rotatably installed on one side of the support sleeve and is in meshing cooperation with the worm wheel, and the driving motor is located on the outer side of the support sleeve and is drivingly connected to one end of the worm.

[0010] The utility model discloses the advantages of a kind of different from traditional mechanical type's limiting device, the two stress contact surfaces of upper and lower pad are less than 4 degrees of slope, under the condition of having external load pressure, when lower pad side leaves upper external carrier, avoid the vibration caused by sudden leaving. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 It is the front view schematic drawing of the utility model.

[0012] Fig. 2 It is the side view schematic drawing of the utility model.

[0013] Fig. 3 It is the lower pad place plan view of the utility model. DETAILED DESCRIPTION

[0014] Refer to the drawings Figs. 1-3The application discloses a novel powder forming limiting device, and a powder forming hydraulic machine comprises a lower oil cylinder, the lower oil cylinder is a double-shaft extension top cylinder, a limiting device is installed at the lower end of the lower extension rod 1 of the lower oil cylinder, and the limiting device comprises a push-pull oil cylinder 2, a lower cushion block 3, a sliding rail 4, an upper cushion block 5 and a lower oil cylinder height adjusting mechanism; the lower oil cylinder height adjusting mechanism is installed below the lower extension rod 1 of the lower oil cylinder; the lower end of the lower extension rod 1 of the lower oil cylinder is provided with the upper cushion block 5; the lower oil cylinder height adjusting mechanism comprises a support plate 6; the sliding rail 4 is installed on the upper surface of the support plate 6; the lower cushion block 3 is slidably installed on the upper surface of the sliding rail 4; the push-pull oil cylinder 2 is installed on one side of the upper surface of the support plate 6; the extension end of the push-pull oil cylinder 2 is connected to one side of the lower cushion block 3; the upper end surface of the lower cushion block 3 is designed as an upper inclined surface which is sunken away from the side of the push-pull oil cylinder 2; the lower end surface of the upper cushion block 5 is designed as a lower inclined surface; and the lower inclined surface is obliquely cut and matched with the upper inclined surface.

[0015] The inclination angle of the upper inclined surface is 4 degrees, and the inclination angle of the lower inclined surface is also 4 degrees, so that the upper inclined surface and the lower inclined surface can be matched to better slowly release under the condition of sufficient vertical support force and to avoid vibration.

[0016] The push-pull oil cylinder 2 is provided with a front proximity switch 7 and a rear proximity switch 8, the front proximity switch 7 and the rear proximity switch 8 are respectively installed on the upper surface of the support plate 6 and are spaced apart from each other; the lower cushion block 3 is provided with a horizontal plate 9 and a bump block 10, one end of the horizontal plate 9 is installed on one side of the lower cushion block 3 close to the rear end, the other end of the horizontal plate 9 is located on the rear side of the lower cushion block 3, the other end of the horizontal plate 9 is provided with the bump block 10, and the bump block 10 cooperates with the front proximity switch 7 and the rear proximity switch 8 to work. The front and rear proximity switches cooperate with the bump block to control the push-pull oil cylinder to move the lower cushion block by a set distance.

[0017] The lower oil cylinder height adjusting mechanism further comprises a worm wheel 11, a worm gear 12, a driving motor 13, a lifting sleeve 14, a support sleeve 15 and a support base 16; the support sleeve 15 is installed at the lower end of the support plate 6; the support base 16 is installed at the lower end of the support sleeve 15; the lifting sleeve 14 is installed in the support sleeve 15; the outer side of the lifting sleeve 14 is designed with external threads; the inner side of the worm wheel 11 is designed with internal threads; the worm wheel 11 is rotatably installed on the outer side of the lifting sleeve 14 and is rotatable at the middle position of the support sleeve 15; the worm gear 12 is rotatably installed on one side of the support sleeve 15 and is in meshing cooperation with the worm wheel 11; the driving motor 13 is located on the outer side of the support sleeve 15 and drives one end of the worm gear 12; two guide columns 18 are respectively installed on the upper surface of the support plate 6; a connecting plate 17 is installed at the lower end of the lower extension rod 1 of the lower oil cylinder; the upper cushion block 5 is installed at the lower end of the connecting plate 17; a guide sleeve is respectively designed and installed on both sides of the connecting plate 17; and the upper ends of the two guide columns 18 are slidably installed in the guide sleeves. The lower oil cylinder height adjusting mechanism is a prior art, and is simply described in the application, for example, the related structure is disclosed in the patent CN201811312140.7.

[0018] The utility model uses when, female mould takes shoulder powder structural part's forming, after part forming, push and pull oil jar contraction action, control lower cushion block slides to one side along slide rail, the contact surface of lower cushion block and upper cushion block is inclined surface cooperation, like this moves to one side and will not release support force suddenly, then is slow release, the utility model designs best inclined surface angle for 4 degrees, under the condition of not changing perpendicular force, by horizontal stress surface design becomes the inclined plane stress of less than 4 degrees, solved the key problem that product stripping support pad was difficult to open or opened vibration, obtained good economic benefits.

Claims

1. A new type of powder forming limiting device, the powder forming hydraulic machine comprises a lower oil cylinder, the lower oil cylinder is a double shaft extension top cylinder, the lower end of the lower extension rod of the lower oil cylinder is provided with a limiting device, characterized in that, It includes push-pull oil cylinder, lower cushion block, slide rail, upper cushion block, lower oil cylinder height adjusting mechanism, lower oil cylinder height adjusting mechanism is installed below the lower extension rod of lower oil cylinder, the lower end of the lower extension rod of lower oil cylinder is provided with upper cushion block, and the lower oil cylinder height adjusting mechanism comprises a support plate, a slide rail is installed on the support plate, a lower cushion block is slidably installed on the slide rail, a push-pull oil cylinder is installed on one side of the support plate, and the extension end of the push-pull oil cylinder is connected to one side of the lower cushion block, the upper end surface of the lower cushion block is designed as an upper inclined surface sinking away from the side of the push-pull oil cylinder, and the lower end surface of the upper cushion block is designed as a lower inclined surface, and the lower inclined surface is inclinedly matched with the upper inclined surface.

2. A novel powder formed check device according to claim 1, wherein, The inclination angle of the upper inclined surface is 4 degrees.

3. A novel powder formed check device according to claim 1, wherein, The push-pull oil cylinder is provided with a front proximity switch and a rear proximity switch on one side, and the front proximity switch and the rear proximity switch are respectively installed on the support plate and leave a certain distance between the front proximity switch and the rear proximity switch; a cross plate and a bump block are installed on one side of the lower cushion block, one end of the cross plate is installed on one side of the lower cushion block close to the rear end position, the other end of the cross plate is located on the rear side of the lower cushion block, the other end of the cross plate is provided with the bump block, and the bump block cooperates with the front proximity switch and the rear proximity switch.

4. A novel powder formed check device according to claim 1, wherein, The lower oil cylinder height adjusting mechanism further comprises a worm gear, a worm, a driving motor, a lifting sleeve, a support sleeve and a support base, the support sleeve is installed at the lower end of the support plate, the support base is installed at the lower end of the support sleeve, the lifting sleeve is installed in the support sleeve, the outer side of the lifting sleeve is provided with external threads, the inner side of the worm gear is provided with internal threads, the worm gear is rotatably installed on the outer side of the lifting sleeve and can be rotatably located in the middle of the support sleeve, the worm is rotatably installed on one side of the support sleeve and is in meshing engagement with the worm gear, and the driving motor is located on the outer side of the support sleeve and is drivingly connected to one end of the worm. Two guide columns are respectively installed on the upper side of the support plate, the lower end of the lower extension rod of the lower oil cylinder is provided with a connecting plate, the middle of the lower end of the connecting plate is provided with the upper cushion block, and one guide sleeve is respectively designed and installed on both sides of the connecting plate, and the upper ends of the two guide columns are slidably installed in the guide sleeves.

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