CN218517644U - Combined die for cold heading - Google Patents

Abstract

The utility model relates to a assembling die for cold-heading, including last mould and bed die, go up the mould and be located the bed die directly over, there is the clearance between the bottom face of going up the mould and the top face of bed die. The upper die comprises an upper die sleeve and an upper die core, the upper die sleeve comprises a first central hole, the first central hole vertically penetrates through the upper die sleeve, the bottom end of the upper die core enters the first central hole from an orifice of the first central hole, which is located on the top end face of the upper die sleeve, moves along the direction of the first central hole, and is ejected out from an orifice of the first central hole, which is located on the bottom end face of the upper die sleeve. The lower die comprises a lower die sleeve and a lower die core, the lower die sleeve comprises a second central hole, the second central hole vertically penetrates through the lower die sleeve, the top end of the lower die core enters the second central hole from an orifice of the second central hole, which is located on the bottom end face of the lower die sleeve, and the top end of the lower die core moves along the direction of the second central hole and is ejected out from an orifice of the second central hole, which is located on the top end face of the lower die sleeve.

Description

Combined die for cold heading

Technical Field

The utility model relates to a cold-heading technical field, concretely relates to assembling die for cold-heading.

Background

This section provides background information related to the present application and does not necessarily constitute prior art.

The cold heading process is a processing process for applying external force to metal in a die by utilizing the self deformation of the metal so as to form a workpiece or a blank with a required shape, is commonly used for processing rods with rod caps such as screws, bolts, screws and the like, and the metal is processed and formed in different dies through a pressurizing machine or a cold heading machine.

A special-shaped piece 100 as shown in fig. 1a and 1b, wherein 3 series and 6 series aluminum and T2 copper with good conductivity and corrosion resistance are mainly used as the material of the special-shaped piece 100. The end face a of the special-shaped piece 100 is provided with a cross-shaped first inner groove 101 and two second inner grooves 102, and the two second inner grooves 102 are arranged on two sides of the first inner groove 101; a third inner groove 103 is arranged on the end surface b of the special-shaped piece 100, a cylindrical first bulge 104 is arranged in the middle of the bottom surface of the third inner groove 103, and the height of the first bulge 104 is greater than the depth of the third inner groove 103; two second protrusions 105 are provided on the outer side wall of the profile 100. The profile 100 can be used as a connecting piece. Because the structure of this dysmorphism piece 100 is complicated, the processing method of preparing this dysmorphism piece 100 at present mainly is die-casting, oil pressure and CNC, but these three kinds of processing methods have following technical problem:

1. when the die casting process is adopted to prepare the special-shaped part 100, the precision of a product cannot reach +/-0.05mm tolerance (the precision of the product prepared by the die casting process can only reach +/-0.1mm tolerance at most), appearance cannot be met, burrs, die parting joint lines and the like exist, and in addition, the die casting process mainly adopts powder materials in the aspect of materials, so that the conductivity and the corrosion resistance of the special-shaped part 100 can be reduced;

and 2, the machining precision of the CNC machining process or the oil pressure forming machining process can meet the requirement, but the problems of low efficiency, low capacity, very high machining cost, more waste materials, low material utilization rate, large investment of personnel and equipment, more occupied machines and the like exist at the same time.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a assembling die for cold-heading, this assembling die for cold-heading is applicable to the preparation dysmorphism piece and with a work piece that dysmorphism structure is similar. The combined die is used in the cold heading process, and the combined die and the cold heading process are adopted to prepare the special-shaped piece, so that the machining precision is met, and meanwhile, the production efficiency is obviously improved.

The technical scheme of the utility model is that: the utility model provides a assembling die for cold-heading, includes mould and bed die, it is located to go up the mould directly over the bed die, the bottom face of going up the mould with there is the clearance between the top face of bed die, the clearance is used for placing the thick embryoid body of treating cold-heading processing.

The upper die comprises an upper die sleeve and an upper die core, the upper die sleeve comprises a first central hole, the first central hole vertically penetrates through the upper die sleeve, the bottom end of the upper die core is located at an orifice of the top end face of the upper die sleeve through the first central hole and enters the first central hole, and when cold heading is carried out, the bottom end of the upper die core moves along the direction of the first central hole and is ejected out through an orifice of the bottom end face of the upper die sleeve through the first central hole.

The lower die comprises a lower die sleeve and a lower die core, the lower die sleeve comprises a second central hole, the second central hole vertically penetrates through the lower die sleeve, the top end of the lower die core enters the second central hole from an orifice of the second central hole, which is located on the bottom end face of the lower die sleeve, and when cold heading is performed, the top end of the lower die core moves along the direction of the second central hole and is ejected out from an orifice of the second central hole, which is located on the top end face of the lower die sleeve.

And the first center hole and the second center hole each function as a guide hole.

In an embodiment, a center line of the first center hole and a center line of the second center hole coincide.

The upper mold core is cylindrical, an annular bulge and an accommodating groove are arranged on the bottom end face of the upper mold core, and the accommodating groove is formed in the inner hole of the annular bulge.

The lower mold core is cylindrical, a cross-shaped bulge and a plurality of cylindrical bulges are arranged on the top end face of the lower mold core, and the plurality of cylindrical bulges are arranged on two sides of the cross-shaped bulge.

In one embodiment, the upper mold core and the lower mold core are both molded by tungsten steel material. The tungsten steel material can be replaced by other metal materials such as iron, aluminum alloy and the like according to the material of the workpiece to be machined.

In an embodiment, a plurality of protruding fixing blocks are arranged on the bottom end face of the upper die sleeve, the fixing blocks are circumferentially arranged around the hole opening of the first central hole in the bottom end face of the upper die sleeve, and fixing grooves matched with the fixing blocks one by one are formed in the bottom end face of the lower die sleeve. The upper die sleeve is connected with the lower die sleeve through the matching connection of the fixing block and the fixing groove.

Compared with the prior art, the combined die can be used for cold heading processing, and excellent processing precision and processing efficiency can be obtained by using the combined die.

Drawings

The accompanying drawings further illustrate the present invention, but the embodiments in the drawings do not constitute any limitation to the present invention.

Fig. 1a and 1b are schematic structural views of a profile piece;

fig. 2 is a schematic diagram comparing a sectional view of a roughcast body and a sectional view of a profile piece;

FIG. 3 is a schematic diagram showing a comparison between before and after the press working of the profile-shaped member;

FIG. 4 is a schematic view of a combined mold for processing a preform

FIG. 5 is an exploded view of a combination mold

FIG. 6 is a schematic structural view of a lower mold core;

FIG. 7a is a half sectional view of the lower core;

fig. 7b is a bottom view of the lower mold core.

Wherein the reference numbers are: 100. a special-shaped piece; 101. a first inner groove; 102. a second inner groove; 103. a third inner groove; 104. a first protrusion; 105. a second protrusion; 200. an upper die; 201. putting a die sleeve; 202. an upper mold core; 203. a first central aperture; 204. a fixed block; 205. an annular projection; 206. an accommodating recess; 300. a lower die; 301. a lower die sleeve; 302. a lower mold core; 303. a second central aperture; 304. fixing the groove; 305. a cross-shaped convex; 306. a columnar protrusion; 400. a coarse blank body; 500. a clamping part.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be mechanically coupled, directly coupled, indirectly coupled through intervening media, and may be interconnected or interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The present embodiment provides a combined mold which can prepare the profile 100 as shown in fig. 1a and 1b when used in a cold heading process, the profile 100 is also referred to as an "aluminum nail", and the profile 100 can be used as a connecting member. The end face a of the special-shaped piece 100 is provided with a cross-shaped first inner groove 101 and two second inner grooves 102, the first inner groove 101 is located in the middle of the end face a of the special-shaped piece 100, and the two second inner grooves 102 are symmetrically arranged on two sides of the first inner groove 101. A third inner groove 103 is formed in the end face b of the special-shaped part 100, a cylindrical first protrusion 104 is arranged in the middle of the bottom face of the third inner groove 103, and the height of the first protrusion 104 is larger than the depth of the third inner groove 103. Two second bulges 105 are arranged on the outer side wall of the special-shaped piece 100, and the two second bulges 105 are arranged by taking the center line of the special-shaped piece 100 as an axis symmetry. The center line of the profile member 100, the center line of the first inner groove 101, the center line of the third inner groove 103, and the center line of the first protrusion 104 coincide.

As shown in fig. 2, the blank 400 is formed into the profile 100 by cold heading and pressing. The blank 400 is formed by cold heading process using the combination die provided by the embodiment to obtain the semi-finished product of the special-shaped piece 100, as shown in fig. 3, the semi-finished product of the special-shaped piece 100 includes the special-shaped piece 100 and the clamping portion 500 integrally connected with the special-shaped piece 100, and the semi-finished product of the special-shaped piece 100 is further processed by stamping to separate the special-shaped piece 100 from the clamping portion 500. The clamping part 500 is of an annular thin material structure, the clamping part 500 is also integrally connected to the side wall of the blank body 400, and the clamping part 500 is used for facilitating a clamping device, such as a manipulator, to clamp the blank body 400, so that the blank body 400 can be moved and the blank body 400 can be fixed at a cold heading station.

The combined die for cold heading provided by the embodiment comprises an upper die 200 and a lower die 300, wherein the upper die 200 is positioned right above the lower die 300, a gap exists between the bottom end surface of the upper die 200 and the top end surface of the lower die 300, and the gap is used for placing the blank 400 to be subjected to cold heading processing.

As shown in fig. 4 to 5, the upper die 200 includes an upper die sleeve 201 and an upper die core 202, the upper die sleeve 201 includes a first central hole 203, the first central hole 203 vertically penetrates through the upper die sleeve 200, a bottom end of the upper die core 202 enters the first central hole 203 from an aperture of the first central hole 203 located on a top end surface of the upper die sleeve 201, and when cold heading is performed, the bottom end of the upper die core 202 moves in a direction of the first central hole 203 and is ejected from an aperture of the first central hole 203 located on a bottom end surface of the upper die sleeve 201. The lower die 300 comprises a lower die sleeve 301 and a lower die core 302, the lower die sleeve 301 comprises a second central hole 303, the second central hole 303 vertically penetrates through the lower die sleeve 301, the top end of the lower die core 302 enters the second central hole 303 from an orifice of the second central hole 303 at the bottom end surface of the lower die sleeve 301, and when cold heading is performed, the top end of the lower die core 302 moves along the direction of the second central hole 303 and is ejected out from an orifice of the second central hole 303 at the top end surface of the lower die sleeve 301. The center line of the first center hole 203 and the center line of the second center hole 303 coincide, and the blank 400 to be cold-headed is located between the orifice of the first center hole 203 at the bottom end surface of the upper die case 201 and the orifice of the second center hole 303 at the top end surface of the lower die case 301. Four corners of the bottom end face of the upper die sleeve 200 are respectively provided with a raised columnar fixing block 204, the four fixing blocks 204 are circumferentially arranged around the orifice of the first central hole 203, which is located on the bottom end face of the upper die sleeve, four corners of the bottom end face of the lower die sleeve 301 are respectively provided with a fixing groove 304, and the fixing grooves 304 and the fixing blocks 204 are matched and linked one by one. The upper die sleeve 201 and the lower die sleeve 301 are connected through the matching connection of the fixing block 204 and the fixing groove 304.

As shown in fig. 6, the lower mold core 302 is a cylindrical mold core, a cross-shaped protrusion 305 and two cylindrical protrusions 306 are arranged on the top end surface of the lower mold core 302, and the two cylindrical protrusions 306 are arranged on two sides of the cross-shaped protrusion 305. The center line of the cross-shaped protrusion 305 coincides with the center line of the lower core 302.

As shown in fig. 7a and 7b, the upper mold core 202 is of a column shape, the bottom end surface of the upper mold core 202 is provided with an annular protrusion 205 and a receiving groove 206, and the receiving groove 206 is arranged at the inner hole of the annular protrusion 205. The center line of the annular protrusion 205, the center line of the receiving groove 206, and the center line of the upper core 202 coincide.

The top end of the upper mold core 202 is connected to the free end of a driving means such as a shuttle cylinder, and the bottom end of the lower mold core 302 is connected to the free end of the driving means such as a shuttle cylinder.

Moving the rough blank body 400 to be subjected to cold heading processing to a position where the first central hole 203 is located between the hole of the bottom end surface of the upper die sleeve 201 and the hole of the second central hole 303 is located between the hole of the top end surface of the lower die sleeve 301, and then performing cold heading processing on the rough blank body 400, wherein the bottom end of the upper die core 202 is ejected from the hole of the first central hole 203 located at the bottom end surface of the upper die sleeve 201, the top end of the lower die core 302 is ejected from the hole of the second central hole 303 located at the top end surface of the lower die sleeve 301, and the rough blank body 400 is extruded by the lower die core 302 and the lower die core 302 simultaneously in the vertical direction to generate plastic deformation. The top end of the lower mold core 302 presses and forms the end face a of the profile 100 on one end face of the rough blank 400 (the cross-shaped protrusion 305 forms the first inner groove 101, and the column-shaped protrusion 30 forms the second inner groove 102), and the bottom end of the upper mold core 202 presses and forms the end face b of the profile 100 on the other end face of the rough blank 400 (the annular protrusion 205 forms the third inner groove 103, and the receiving groove 206 forms the first protrusion 104). The blank 400 is subjected to cold heading to form a semi-finished product of the irregular part 100.

The combined die provided by the embodiment is used for cold heading to prepare the special-shaped part 100, so that excellent machining precision and higher machining efficiency can be realized.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (5)

1. The utility model provides a assembling die for cold-heading, includes mould and bed die, it is located to go up the mould directly over the bed die, its characterized in that:

a gap is formed between the bottom end face of the upper die and the top end face of the lower die;

the upper die comprises an upper die sleeve and an upper die core, the upper die sleeve comprises a first central hole, the first central hole vertically penetrates through the upper die sleeve, the bottom end of the upper die core enters the first central hole from an orifice of the first central hole, which is located on the top end face of the upper die sleeve, and the bottom end of the upper die core moves along the direction of the first central hole and is ejected out from an orifice of the first central hole, which is located on the bottom end face of the upper die sleeve; the lower die comprises a lower die sleeve and a lower die core, the lower die sleeve comprises a second central hole, the second central hole vertically penetrates through the lower die sleeve, the top end of the lower die core enters the second central hole from an orifice of the second central hole, which is positioned on the bottom end face of the lower die sleeve, and the top end of the lower die core moves along the direction of the second central hole and is ejected out from an orifice of the second central hole, which is positioned on the top end face of the lower die sleeve.

2. A combined mould as claimed in claim 1, in which: the center line of the first center hole and the center line of the second center hole coincide.

3. The combination mold of claim 2, wherein: the upper mold core is cylindrical, an annular bulge and an accommodating groove are arranged on the bottom end face of the upper mold core, and the accommodating groove is formed in the inner hole of the annular bulge.

4. A combined mould according to claim 3, characterised in that: the lower mold core is cylindrical, a cross-shaped bulge and a plurality of cylindrical bulges are arranged on the top end face of the lower mold core, and the plurality of cylindrical bulges are arranged on two sides of the cross-shaped bulge.

5. A combined mould according to claim 4, characterised in that: the bottom face of the upper die sleeve is provided with a plurality of protruding fixing blocks, the fixing blocks are arranged around the first center hole and located in the circumferential direction of the hole of the bottom face of the upper die sleeve, the bottom face of the lower die sleeve is provided with fixing grooves matched with the fixing blocks one by one, and the fixing blocks are matched with the fixing grooves to be connected with the lower die sleeve.

Images