CN103920803B - Radially squeeze channel mould - Google Patents

Abstract

The present invention radially squeezes channel mould, belongs to Sheet Metal Forming Technology extrusion technique field；Technical problem to be solved there is provided a kind of simple for process, part accurate positioning, in the course of processing, part will not deform, and the radial direction that production efficiency is high, conforming product rate is high squeezes channel mould；The technical scheme solving the employing of this technical problem is: radially squeeze channel mould, including part of the upper die and part of the lower die, part of the upper die is coaxially disposed with part of the lower die, the structure of part of the upper die is: include backing plate, flexible die, bung flange and die shank, flexible die top to expand the hole bottom platform and backing plate and die shank coaxial and with in interference fits loading shank hole, the structure of part of the lower die is: include wedge mould, handle, spring, swivel nut, template, screw, pressing plate and core, the upper surface of template is provided with expansion platform hole, wedge mould upper end is the opening of inverted trapezoidal, and lower end is for expanding platform；The composite can be widely applied to Sheet Metal Forming Technology extrusion technique field.

Description

radial extrusion die

technical field

The invention discloses a radial groove extrusion die, which belongs to the technical field of stamping process extrusion, and in particular relates to an extrusion die for the wall part of a thin-walled cup-shaped part.

Background technique

The wall groove of the thin-walled cup-shaped part in the prior art is processed by a round lathe, and the processing fixture is composed of a core rod and a push rod. The core rod is installed on the main shaft of the round car, and the ejector rod is installed on the tailstock of the corresponding machine tool. During processing, the end face of the core rod head is used for positioning, and the parts are placed outside the core rod. The front end of the ejector rod on the tailstock withstands the bottom surface of the part, and the groove is cut with a turning tool.

Due to the thin wall of the part, the cylindricity of the stamped part is relatively poor. Not only is the cutting speed high during processing, the part is easily deformed, but also the groove depth of the processed part is poorly consistent, and the production efficiency and overall yield are low.

Contents of the invention

The invention overcomes the shortcomings of the prior art, and provides a radial extrusion die with simple and easy process, accurate positioning of parts, no deformation of parts during processing, high production efficiency and high product qualification rate.

In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a radial extrusion die, including an upper die part and a lower die part, the upper die part and the lower die part are coaxially arranged, and the upper die part is arranged on the lower die part The upper part of the upper mold part and the lower mold part are matched with parts. The structure of the upper mold part is: including a backing plate, an elastic die, a coil and a handle. The elastic die is the upper part It is a connected expansion platform, and the lower part is an elastic body with ribs in the inner hole of three petals. The top of the elastic die is provided with a backing plate, and the bottom of the mold handle is provided with a hole. The backing plate is coaxial with the hole at the bottom of the mold shank and fitted into the hole of the mold shank with a transition fit. The coil is sleeved outside the elastic die and threaded with the die shank to fasten the expansion table of the elastic die and the backing plate to the mold shank. superior;

The structure of the lower mold part is: including wedge mold, handle, spring, screw sleeve, template, screw, pressing plate and core mold, the upper surface of the template is provided with an expansion hole, and the upper end of the wedge mold is an inverted trapezoid Opening, the lower end is an expansion platform, the wedge mold is arranged on the upper surface of the template, the expansion platform of the wedge mold is coaxially matched with the expansion platform hole of the template, and the pressure plate is arranged on the outer upper end of the expansion platform of the wedge mold , the screw is threaded through the corresponding hole of the pressure plate and the template to fasten the wedge mold, and the core mold is respectively placed through the hole in the middle of the template and the wedge mold, and the upper end of the core mold is used as the positioning of the bottom hole of the part part, the positioning part of the bottom hole of the part is coaxially matched with the mandrel, and an expansion table is set in the middle of the mandrel, one end of the handle is a hand-held end, and the other end is set as a threaded end, and the threaded end is set There are external threads, the threaded end of the handle is fixedly connected with the wedge mold through the groove on the pressure plate, and the corresponding angles of the wedge mold, core mold and parts are changed by moving the handle, and the spring is vertically arranged in the screw sleeve , the lower end of the spring is set on the bottom of the screw sleeve, the upper end of the spring is in contact with the lower end of the mandrel, the screw sleeve is coaxially arranged with the wedge mold and fastened on the wedge mold in a threaded connection, and the spring is pressed Tight on the mandrel.

The expansion platform of the wedge mold is transitionally matched with the expansion platform hole of the formwork.

Compared with the prior art, the present invention has the beneficial effects that: the present invention puts the parts on the mandrel, the slider goes down, the upper end surface of the working hole in the lower part of the elastic die contacts the bottom of the part and pushes the part and the mandrel to overcome the resistance of the spring. Downward movement, along with the downward movement of the slider, the cone surface of the elastic concave die touches the cone surface of the wedge die, and its three-lobed cone surface is restricted by the cone surface of the wedge die and overcomes its own elastic resistance to move in the direction of the radial axis, so that the elastic concave die The three-lobed ribs of the die hole contact the part one after another and partially squeeze the wall. As the slider continues to descend, the local wall thickness of the part becomes thinner. point; during the return journey, as the elastic die moves upward, the parts and mandrel rise under the action of the spring, and as the rising elastic die expands with the relative displacement of the tapered surface of the wedge die under the action of its own elasticity, the parts from The expanded elastic die comes out, the slider reaches the top dead center, and the first extrusion is completed; move the handle to change the corresponding angles of the wedge mold, core mold and parts, repeat the above extrusion process, and complete the second extrusion . The parts are taken out from the mandrel, and the whole operation is completed; compared with the prior art, the present invention realizes extrusion production, and the parts have good consistency. The invention has the advantages of simple design principle, compact structure, good manufacturability, convenient operation, stable quality, greatly improved work efficiency and comprehensive yield of parts.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a top view of the lower mold part of the present invention.

In the figure, 1 is a backing plate, 2 is an elastic die, 3 is a part, 4 is a wedge mold, 5 is a handle, 6 is a spring, 7 is a screw sleeve, 8 is a template, 9 is a screw, 10 is a pressure plate, 11 is a Mandrel, 12 are coils, 13 are mold handles.

detailed description

As shown in Fig. 1 and Fig. 2, the present invention includes an upper mold part and a lower mold part. There is a part 3 matched with the lower mold part. The structure of the upper mold part is: including a backing plate 1, an elastic die 2, a coil 12 and a handle 13. The upper part of the elastic die 2 is connected The expansion table and the lower part are elastic bodies with ribs in the three-lobed inner hole. The top of the elastic die 2 is provided with a backing plate 1, and the bottom of the mold handle 13 is provided with a hole. The expansion table on the upper part of the elastic die 2 And the backing plate 1 is coaxial with the hole at the bottom of the mold handle 13 and is loaded into the hole of the mold handle 13 with a transition fit. The coil 12 is sleeved outside the elastic die 2 and threaded with the die handle 13 to expand the elastic die 2. The platform and backing plate 1 are fastened on the mold handle 13;

The structure of the lower mold part is: comprising wedge mold 4, handle 5, spring 6, screw sleeve 7, template 8, screw 9, pressing plate 10 and core mold 11, the upper surface of described template 8 is provided with expansion hole, The upper end of the wedge mold 4 is an inverted trapezoidal opening, and the lower end is an expanded platform. The wedge mold 4 is arranged on the upper surface of the template 8, and the expanded platform of the wedge mold 4 is coaxially matched with the expanded platform hole of the template 8. Setting, the pressure plate 10 is arranged on the upper end of the expansion platform of the wedge mold 4, the screw 9 is threaded through the corresponding hole of the pressure plate 10 and the template 8 to fasten the wedge mold 4, and the core mold 11 respectively passes through the template 8 and the template 8. The hole in the middle of the wedge mold 4 is placed side by side. The upper end of the mandrel 11 is used as the positioning part of the bottom hole of the part 3. The positioning part of the bottom hole of the part 3 is coaxially matched with the mandrel 11. The mandrel 11 An expansion platform is arranged in the middle of the handle 5. One end of the handle 5 is a hand-held end, and the other end is set as a threaded end. The threaded end is provided with external threads. The wedge mold 4 is fixedly connected, and the corresponding angles of the wedge mold 4, the mandrel 11 and the part 3 are changed by moving the handle 5. The spring 6 is vertically arranged in the screw sleeve 7, and the lower end of the spring 6 is arranged on the screw sleeve 7. The bottom of the bottom, the upper end of the spring 6 is in contact with the lower end of the mandrel 11, the screw sleeve 7 is coaxially arranged with the wedge mold 4 and fastened on the wedge mold 4 in a threaded connection mode, and the spring 6 is pressed against the mandrel. 11 on.

The expanded platform of the wedge mold 4 is transitionally matched with the expanded platform hole of the template 8 .

The working process of the present invention: the elastic die 2 is connected with the upper expansion table, and the lower part is an elastic body with three lobes and ribs in the inner hole. Insert into the mold handle 13 holes and the backing plate 1 is on top. The coil 12 is sleeved outside the elastic die 2 and is threadedly connected with the handle 13 to fasten the elastic die 2 and the backing plate 1 to form an upper die part. The expansion table of the wedge mold 4 is coaxial with the corresponding expansion hole of the template 8, and is placed in it with a transition. The pressure plate 10 is on the outer expansion table of the wedge mold 4, and the screw 9 is threadedly connected with the template 8 through the corresponding hole of the pressure plate 10. The wedge mold 4 is fastened. One end of the thread of the handle 5 is fixedly connected with the wedge mold 4 through the 8 grooves of the pressing plate. The mandrel 11 is placed therein through the holes of the template 8 and the wedge mold 4 respectively, and the spring 6 is in the screw sleeve 7 under the expanded platform of the mandrel 11, and the screw sleeve 7 is coaxial with the wedge mold 4 to screw the spring 6 Compress to form the lower mold part. The upper mold part and the lower mold part are coaxial to form a radial extrusion die; the wedge mold 4 exerts a radial pressure on the elastic die 2 by using the force of the machine tool slider, and the part 3 is made by using the core mold 11 capable of axial displacement. The bottom is positioned on the end surface of the expansion hole of the elastic die 2 in motion, and the corresponding closed height of the machine tool is adjusted to control the depth of the groove on the wall of the part 3; moving the handle 5 can change the position of the squeeze groove in the circumferential direction of the part 3.

The working principle of the present invention is: set the part 3 on the mandrel 11, the slider moves downward, the upper end surface of the working hole at the lower part of the elastic die 2 contacts the bottom of the part 3 and pushes the part 3 and the mandrel 11 to move downward against the resistance of the spring 6 , as the slider goes down, the 2 cones of the elastic die contact with the 4 cones of the wedge die, and the three-lobe cones are restricted by the 4 cones of the wedge die and overcome their own elastic resistance to move in the direction of the radial axis, so that the elasticity The three-lobed ribs in the hole 2 of the die contact the part 3 successively and partially squeeze the wall. As the slider continues to descend, the local wall thickness of the part 3 becomes thinner, and the three-lobed inner wall of the hole 2 of the elastic die all contacts the surface of the part 3 , the slider reaches the bottom dead center.

During the return journey, as the elastic die 2 moves upward, the part 3 and the mandrel 4 rise under the action of the spring 6, and as the rise, the elastic die 2 expands with the relative displacement of the cone surface of the wedge die 4 under the action of its own elasticity. Open, the part 3 is released from the expanded elastic die 2, the slider reaches the top dead center, and the first extrusion is completed.

Move the handle 5 to change the corresponding angles of the wedge mold 4, the mandrel 11 and the part 3, repeat the above-mentioned extrusion process, and complete the second extrusion. Take out part 3 from mandrel 4, and whole operation is finished.

The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Within the scope of knowledge of those of ordinary skill in the art, various modifications can be made without departing from the gist of the present invention. kind of change.

Claims (2)

1. null1. radially squeeze channel mould，It is characterized in that: include part of the upper die and part of the lower die，Described part of the upper die is coaxially disposed with part of the lower die，Described part of the upper die is arranged on the top of part of the lower die，Between described part of the upper die and part of the lower die, coupling is provided with part (3)，It is characterized in that，The structure of described part of the upper die is: include backing plate (1)、Flexible die (2)、Bung flange (12) and die shank (13)，Described flexible die (2) be top be connected expansion platform、Bottom is the elastomer of pore area muscle in three lobes，The top of described flexible die (2) is provided with backing plate (1)，The bottom of described die shank (13) arranges porose，The expansion platform on described flexible die (2) top and backing plate (1) are coaxial with the hole of die shank (13) bottom and with in interference fits loading die shank (13) hole and backing plate (1) is upper，Described bung flange (12) is placed on flexible die (2) and outward and flexible die (2) expansion platform and backing plate (1) is anchored on die shank (13) with die shank (13) thread connection；

   nullThe structure of described part of the lower die is: include wedge mould (4)、Handle (5)、Spring (6)、Swivel nut (7)、Template (8)、Screw (9)、Pressing plate (10) and core (11)，The upper surface of described template (8) is provided with expansion platform hole，Described wedge mould (4) upper end is the opening of inverted trapezoidal，Lower end is for expanding platform，Described wedge mould (4) is arranged on the upper surface of described template (8)，The expansion platform of described wedge mould (4) coaxially mates setting with the expansion platform hole of template (8)，Described pressing plate (10) is arranged on the expansion platform outer upper ends of wedge mould (4)，Wedge mould (4) is fastened with template (8) thread connection by described screw (9) through pressing plate (10) respective aperture，Described core (11) is placed in wherein through the hole in the middle of template (8) and wedge mould (4) respectively，Described core (11) upper end is the position portion as part (3) bottom outlet，The position portion of described part (3) bottom outlet coaxially mates setting with core (11)，The centre of described core (11) is provided with expansion platform，One end of described handle (5) is handheld terminal，The other end is set to the end of thread，The described end of thread is provided with external screw thread，The end of thread of described handle (5) connects firmly with wedge mould (4) through the groove being arranged on pressing plate (10)，The respective angles being made wedge mould (4) and core (11) and part (3) by moving handle (5) is changed，Described spring (6) is vertically arranged in swivel nut (7)，The lower end of described spring (6) is arranged on the bottom of swivel nut (7)，The upper end of described spring (6) and the lower end in contact of core (11)，Described swivel nut (7) and wedge mould (4) are coaxially disposed and are fastened on wedge mould (4) with threaded connection mode，Spring (6) is pressed on core (11).
2. The most crowded a kind of channel mould the most according to claim 1, it is characterised in that described wedge mould (4) expands the expansion platform hole interference fits of platform and template (8).