Titanium alloy electrode block pressing die

Abstract

The invention provides a titanium alloy electrode block pressing die which comprises a base plate, a compression-resistant die holder, a wear-resistant lining plate, a bottom die, a punch and a punch body, the wear-resistant lining plate is sleeved with the compression-resistant die holder, a rectangular die cavity is formed in the center of the wear-resistant lining plate, a flange shoulder is arranged at the upper end of the wear-resistant lining plate, and the flange shoulder is embedded in a flange sinking groove; the bottom die comprises a base part and a gauge-shaped part, the base part is fixed to the base plate, the gauge-shaped part and the base part are fixedly connected into a whole and arranged in the rectangular die cavity, and the bottom die is used for being vertically matched with the punch to form a preset blank shape; the punch body is fixed at the lower end of the hydraulic motor sliding block, the punch is fixed at the lower end of the punch body, the lower surface of the punch is a fine plane, and the size of the cross section of the punch is matched with that of the rectangular die cavity. And therefore, bar products with different diameter specifications are smelted, the die application range is expanded, the die usage amount for forming different products is reduced, and the die replacement and maintenance cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of titanium and titanium alloy forming, in particular to a titanium alloy electrode block pressing die. Background Art

[0002] The most commonly used preparation method for titanium and titanium alloys is the vacuum consumable arc furnace melting method, which uses a hydraulic press to compress the discrete particle mixture in the mold cavity into an electrode block. In the traditional production method, a single electrode block is usually a 1 / 2 cylinder, two 1 / 2 cylinders are combined into one section, and multiple sections are combined to form the finished titanium and titanium alloy cylindrical bars.

[0003] Production of 1 / 2 cylinder: To press a 1 / 2 cylindrical titanium alloy electrode block, the traditional extrusion die includes a punch, a die and a frame die. The die is installed in a hydraulic press. A pad is provided at the bottom of the hydraulic press. The pad is provided with a groove for clamping the die and the frame die. The die is matched and fitted in the frame die. A cavity for accommodating the raw material is provided in the middle of the die. The punch is fixed on the upper slide of the hydraulic press. The upper slide of the hydraulic press can drive the punch downward. The punch is pressed into the cavity of the die. The raw material is squeezed into a titanium alloy electrode block with a certain shape and density by the huge pressure of the hydraulic press.

[0004] The existing titanium alloy bar production has the following defects: 1) The shape of the bottom die and the punch constrains the material to form an electrode block of a specific shape and specification. One electrode block corresponds to a rod of one diameter. The mold used to make a single electrode block is a special mold, which means that one mold can only produce titanium alloy rods of one diameter, and the utilization rate of the mold is low.

[0005] 2) In the existing forming mold, the diameter of the rod is the circumscribed circle of the end face (2H×L) of the cast electrode block group, and the length of the rod is the remaining axial length (13W) of the cast electrode block group after smelting and filling. The existing forming mold needs to prepare multiple sets of liners with different cross-sections, punches with different cross-sections and multiple bases of different sizes to make different electrode blocks. One set of molds corresponds to the forming of one electrode block. The utilization rate of the mold is low and the production cost is high.

[0006] 3) The density of the formed electrode block is proportional to the surface pressure of the punch pressing surface (W×L). The larger the pressing cross-sectional area, the greater the required hydraulic press pressing force. Pressing titanium and titanium alloy mixed materials requires overcoming a large die side pressure. At the same time, the compressed material has a high hardness. Therefore, the larger the rod, the greater the damage to the mold cavity during the pressing process during production, and the higher the resistance requirements for the mold. Summary of the invention

[0007] The technical problem to be solved by the present invention is how to improve the utilization rate of the pressing die for the titanium alloy electrode block.

[0008] The present invention solves the above-mentioned problem by adopting the following technical solution: A titanium alloy electrode block pressing die, comprising: The backing plate is fixed on the working table of the hydraulic press, and a positioning groove is provided on its upper surface; The pressure-resistant die seat is provided with a cylindrical through hole, which is concentrically arranged with the positioning groove, and a flange recess is arranged at the top of the pressure-resistant die seat; the lower part of the outer wall of the pressure-resistant die seat is a thickened part, the upper part of the outer wall is a thin-walled part, and the thickened part to the thin-walled part is a tapered transition; The wear-resistant lining plate is sleeved in the pressure-resistant die seat, the center of which is provided with a rectangular die cavity, and the upper end of which is provided with a flange shoulder, which is embedded in the flange sink groove; The bottom mold includes a base portion and a rule portion, wherein the base portion is fixed to the backing plate, the rule portion is fixedly connected to the base portion and is disposed in a rectangular mold cavity, and the bottom mold is used to cooperate with the punch head up and down to form a predetermined blank shape; The punch and the punch body are fixed at the lower end of the hydraulic motor slide block, the punch is fixed at the lower end of the punch body, the lower surface of the punch is a precision plane, and the cross-sectional size of the punch matches the rectangular die cavity.

[0009] Compared with the prior art, the present invention adopting the above structure has the following beneficial effects: This solution changes the bottom die convex angle and the combination form of the cast electrode block to achieve a punch pressing cross-section to form multiple single electrode blocks, and then melt rod products of different diameters and specifications, expand the application range of the mold, reduce the use of molds for forming different products, and reduce the cost of mold replacement and maintenance.

[0010] As a preferred embodiment, a further technical solution of the above structure is: The wear-resistant lining plate is composed of two symmetrical long lining plates and two symmetrical short lining plates, and the dividing line between the long lining plates and the short lining plates is based on the diagonal line of the rectangular mold cavity.

[0011] The beneficial effects obtained by the above features are: the split design of the wear-resistant liner is easy to install, and it is easy to split and assemble different electrode blocks. The advantage of the dividing line position design is that the inclined surfaces of each liner are mutually constrained to avoid displacement of the liner toward the center.

[0012] The bottom mold is provided with a corresponding convex angle structure on its rule-shaped part, and the convex angle is wedge-shaped. The bottom surface of the wedge is fixedly connected to the base part, the outer side surface of the wedge is perpendicular to the bottom surface, the inner side surface of the wedge is an inclined surface and a circular arc-shaped curved wall, and the base part is a flange plate that is widened and lengthened based on the lower end of the rule-shaped part, which is embedded in the positioning groove and fixed with the pad bolts.

[0013] Beneficial effects obtained from the above features: the bottom mold of this embodiment has a simple structure, high strength and is easy to produce.

[0014] Specifically, the bottom mold includes three types: a first regulating mold, a second regulating mold and a third regulating mold. The first regulating mold has a regulating portion including two symmetrically arranged convex corners, the arc-shaped curved walls of the two convex corners are relatively arranged and connected, the arc-shaped curved walls of the two convex corners are combined into half a circle, and the outer side walls of the two convex corners are in close contact with the opposite side walls of the rectangular mold cavity in the long direction; the second regulating mold has a regulating portion including a convex corner, the outer side wall of the convex corner is in close contact with one side wall of the rectangular mold cavity, the lower end of the arc-shaped curved wall extends to abut against the opposite side wall of the rectangular mold cavity, and the arc-shaped curved wall is a quarter circle; the third regulating mold has a regulating portion including two symmetrically arranged convex corners, the arc-shaped curved walls of the two convex corners are relatively arranged and connected, the arc-shaped curved walls of the two convex corners are combined into half a circle, and the outer side walls of the two convex corners are in close contact with the opposite side walls of the rectangular mold cavity in the short direction.

[0015] Beneficial effects obtained from the above features: the three bottom mold structures provided in this example are adapted to the same mold cavity cross-section and can be formed using the same pressure-resistant mold base and wear-resistant lining plate. The three bottom molds can also produce different electrode blocks and different electrode rods by combination. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an overall schematic diagram of the electrode block forming mold provided by the present invention; Figure 2 The wear-resistant lining structure of the present invention; Figure 3 This is a schematic diagram of an embodiment of the wear-resistant lining of the present invention; Figure 4 This is a schematic diagram of the structure of the first regular mold of the present invention; Figure 5 This is a structural diagram of a 1 / 2 large-size electrode block corresponding to the first regular mold of the present invention; Figure 6 An embodiment of a rod material using a 1 / 2 large size electrode block combination; Figure 7 It is a schematic diagram of the structure of the second regular mold of the present invention; Figure 8 This is a 1 / 4 electrode block structure diagram corresponding to the second regular mold of the present invention; Fig. 9 This is an embodiment of a rod material using a 1 / 4 electrode block combination; Fig.10 This is a schematic diagram of the structure of the third regular mold of the present invention; Fig.11 This is a structural diagram of a 1 / 2 small-size electrode block corresponding to the third regular mold of the present invention; Fig.12 This is an example of a rod material composed of 1 / 2 small-sized electrode blocks.

[0017] Explanation of the reference numerals in the accompanying drawings: 1. pressure-resistant die seat; 2. wear-resistant lining; 3. bottom die; 4. pad; 5. punch; 6. punch body; 201. outer wall of wear-resistant lining; 202. rectangular die cavity; 203. flange shoulder; 204. long lining; 205. short lining; 206. dividing line; 301. convex corner; 3011. bottom surface of wedge; 3012. outer side surface of wedge; 3013. inner side surface of wedge; 302. base portion. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and drawings. Here, the illustrative embodiments of the present invention and their description are used to explain the present invention, but are not intended to limit the present invention.

[0019] The present invention improves the applicability of the mold and enables a set of molds to press out electrode blocks of various specifications, thereby being able to produce a variety of titanium alloy bars; at the same time, the pressing force is fully utilized when pressing electrode blocks of different specifications, and under the premise that the size and weight of the cast electrode block group are certain, the weight of the pressed single electrode block is increased, thereby reducing the number of welds in the electrode block group.

[0020] The present invention provides a solution to improve the application range of titanium and titanium alloy electrode block pressing dies. The main structure of the die includes a pressure-resistant die seat 1, a wear-resistant lining plate 2, a forming bottom die 3, a punch 5 and a punch body 6. Figure 1 To Attachment Fig. 9 Provide a detailed description of this plan.

[0021] A titanium alloy electrode block pressing die, comprising: The backing plate 4 is fixed on the hydraulic press workbench, and a positioning groove is arranged on the upper surface of the backing plate 4. The backing plate 4 is made of thick plate, and the shape and size of the positioning groove can be embedded in the bottom mold 3. The backing plate 4 is processed with threaded holes for fixing the bottom mold 3.

[0022] The compression die seat 1 is provided with a cylindrical through hole, which is concentrically arranged with the positioning groove, and a flange recess is provided at the top of the compression die seat 1. The lower part of the outer wall of the compression die seat 1 is a thickened part, and the upper part of the outer wall is a thin-walled part, and the thickened part to the thin-walled part is a tapered transition. The compression die seat 1 is integrally cast and used to bear the pressing load of the punch 5.

[0023] The wear-resistant lining plate 2 is sleeved in the pressure-resistant die seat 1, and a rectangular die cavity 202 is provided in the center thereof. A flange shoulder 203 is provided at the upper end thereof, and the flange shoulder 203 is embedded in the flange sink groove.

[0024] The bottom mold 3 includes a base portion 302 and a shaped portion. The base portion 302 is fixed to the pad 4. The shaped portion is fixedly connected to the base portion 302 and is disposed in the rectangular mold cavity 202. The bottom mold 3 is used to cooperate with the punch 5 up and down to form a predetermined blank shape.

[0025] Punch 5 and punch body 6, punch body 6 is fixed to the lower end of the hydraulic motor slide, punch 5 is fixed to the lower end of punch body 6, the lower surface of punch 5 is a precision plane, and the cross-sectional size of punch 5 matches the rectangular die cavity 202. Punch 5 and punch body 6 are made of high-strength alloy forging, wherein punch 5 is a rectangular block, the size of which matches the rectangular die cavity 202 of the liner, the lower end of punch body 6 is a columnar rectangular structure, and the upper end is a rectangular thick plate structure, the two are transitioned through a conical surface, and punch 5 and punch body 6 are connected by a bolt key.

[0026] The pad 4 is fixed on the hydraulic press workbench. The pad 4 serves as a positioning component of the mold. The center point of the mold is determined by the positioning groove. The hydraulic press workbench is provided with a positioning mechanism for adjusting and fixing the pad 4; the base portion 302 of the bottom mold 3 is fixed in the positioning groove and can be further fixed by bolts; the wear-resistant lining 2 is installed in the pressure-resistant die seat 1, and the load capacity is enhanced by the pressure-resistant die seat 1. The two can move together through the cooperation of the flange groove on the top and the flange shoulder 203, and the pressure-resistant die seat 1 and the wear-resistant lining 2 can be further fixed by flange bolts; the rectangular mold cavity 202 of the wear-resistant lining 2 is mounted on the regular portion of the bottom mold 3, and the pressure-resistant die seat 1 falls on the pad 4 at the same time. The regular portion makes the lower part of the rectangular mold cavity 202 form the shape of the outer surface of the electrode block, and the rectangular mold cavity 202 is filled with discrete mixed materials. The punch body 6 moves downward with the hydraulic motor slide, and the punch 5 is used to extrude the discrete mixed materials to form a single electrode block.

[0027] See also Figure 2 , Figure 3 The outer wall 201 of the wear-resistant liner of the present invention is cylindrical, and the outer diameter is adapted to the cylindrical through hole of the pressure-resistant die seat 1. The center of the wear-resistant liner 2 is a rectangular mold cavity 202. The rectangular mold cavity 202 is filled with discrete mixed materials for casting electrode blocks. The top of the discrete mixed materials is the cross section of the bar, and the rectangular mold cavity 202 forms a rectangular cross section. As an option, the wear-resistant liner 2 is composed of two symmetrical long liner plates 204 and two symmetrical short liner plates 205. The dividing line 206 between the long liner plates 204 and the short liner plates 205 is a diagonal line based on the rectangular mold cavity 202. The outer walls 201 of the four wear-resistant lining plates are coaxial with the cylindrical through holes of the pressure-resistant die base 1 and are in the shape of arcs of equal diameter. The long lining plates 204 and the short lining plates 205 surround and enclose a rectangular hollow cavity. The long side of the rectangular cavity 202 is L, and the short side is W. The upper end of the lining plates is made into a flange shoulder 203, and the flange shoulder 203 is made into bolt holes for connecting to the pressure-resistant die base 1.

[0028] The bottom die 3 of the present invention is a replaceable high-strength forging, and the rule portion used for forming the electrode block is provided with a corresponding convex angle 301 structure, the convex angle 301 is wedge-shaped, the bottom surface 3011 of the wedge is fixedly connected to the base portion 302, the outer side surface 3012 of the wedge is perpendicular to the bottom surface, the inner side surface 3013 of the wedge is an inclined surface and a circular arc-shaped curved wall, the base portion 302 is a flange sheet based on the widened and lengthened lower end of the rule portion, which is embedded in the positioning groove and fixed with bolts to the pad 4.

[0029] This solution designs three different bottom molds 3 for replacement: The first shaped mold, the shaped part includes two symmetrically arranged convex corners 301, the arc-shaped curved walls of the two convex corners 301 are arranged oppositely and connected, the arc-shaped curved walls of the two convex corners 301 are combined into a half circle, and the outer side walls of the two convex corners 301 are in close contact with the opposite side walls of the rectangular mold cavity 202 in the long direction, that is, they are in close contact with the two short liner plates 205. The close contact described in this specification can be through the close contact of high-precision flat surfaces, or can be through the sealing joint of a seal, and the seal is a high temperature resistant part.

[0030] The second regulating mold has a regulating portion including a convex corner 301, the outer side wall of the convex corner 301 is in close contact with one side wall of the rectangular mold cavity 202, and the lower end of the arc-shaped curved wall extends to abut against the opposite side wall of the rectangular mold cavity 202, and the arc-shaped curved wall is a quarter of a circle.

[0031] The third regulating mold, the regulating part includes two symmetrically arranged convex corners 301, the arc-shaped curved walls of the two convex corners 301 are arranged opposite to each other and connected, the arc-shaped curved walls of the two convex corners 301 are combined into half a circle, and the outer side walls of the two convex corners 301 are in close contact with the opposite side walls of the short direction of the rectangular mold cavity 202, that is, they are in close contact with the two long lining plates 204.

[0032] The first regular mold is used to make 1 / 2 large-sized electrode blocks, which are obtained by pressing the pressure-resistant die seat 1, the wear-resistant lining plate 2, the large-sized double-convex corner 301 bottom die 3 (i.e., the first regular mold) and the punch 5. The upper end of the obtained single 1 / 2 large-sized electrode block is a rectangular plane and the lower end is a semicircular shape. The specifications are as follows: Figure 4 , length is L, width is W, height is H; see Figure 7 The forged electrode block group is obtained by welding, with the sum of W being the length of the electrode rod, L being the width of the electrode rod, and 2H being the height of the electrode rod.

[0033] The second regular mold is used to make a 1 / 4 electrode block. The upper end of the obtained single 1 / 4 electrode block is a rectangular plane and the lower end is a quarter circle. The specifications are as follows Figure 5 , the electrode block is W long, W wide, and H high; see Figure 8 The forged electrode block group is obtained by welding, with the sum of L being the length of the electrode rod, 2W being the width of the electrode rod, and 2H being the height of the electrode rod.

[0034] The third regular mold is used to make a 1 / 2 small-sized electrode block. The upper end of the obtained single 1 / 2 small-sized electrode block is a rectangular plane and the lower end is a semicircle. The diameter of the semicircle is equal to the short side length of the rectangular mold cavity 202. The specifications are as follows: Figure 6 , whose length is L, width is W, and height is H; see Fig. 9 The forged electrode block group is obtained by welding, with the sum of L being the length of the electrode rod, W being the width of the electrode rod, and 2H being the height of the electrode rod.

[0035] The scheme proposed in the present invention is used to form three different electrode blocks. In the prior art, if the same three electrode blocks are to be formed, three sets of wear-resistant liners 2 with different cross-sections, three sets of punches 5 with different cross-sections and three sets of different bottom molds 3 are required, and the whole set of molds are replaced when in use. This scheme uses different bottom molds 3 to form a variety of electrode blocks under the condition of the same mold cavity cross-section. The mold of the present invention includes a set of punches 5, a set of wear-resistant liners 2 and a pressure-resistant die seat 1 and a set of multiple bottom molds 3 are respectively combined. The pressure-resistant die seat 1 and the wear-resistant liners 2 in the pressing mold can always be used. Under the condition of not changing the pressing cross-section (W×L), full-load pressing is performed. Only different bottom molds 3 need to be replaced to complete the task of forming electrode blocks of different specifications.

[0036] The present invention uses 1 / 2 small-sized electrode blocks to extend the length of a single electrode block, reduces the number of single electrode blocks required for a small-sized casting electrode block group, and reduces the amount of electrode block combination welding; uses 1 / 4 electrode blocks to form large-sized bars, effectively improving the pressing efficiency, and a set of molds to form a variety of bars, reducing the waste of resources and time caused by frequent replacement of lining plates for multi-specification products; improves the applicability of the mold, and realizes the use of a set of molds with multiple specifications; changes the welding form of the casting electrode block group, and further improves the size range of the smelted bars after mold forming. This solution expands the use range of a single set of molds, reduces the cost of mold replacement and maintenance, improves product production efficiency, and greatly reduces the cost of molds.

[0037] The above description is only a preferred feasible embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent changes made using the contents of the present specification and its drawings are included in the scope of rights of the present invention.

Claims

1. A titanium alloy electrode block pressing die, characterized in that: include: A backing plate (4) is fixed on the working table of the hydraulic press, and a positioning groove is provided on its upper surface; The pressure-resistant die seat (1) is provided with a cylindrical through hole, which is arranged concentrically with the positioning groove, and a flange recess is provided at the top of the pressure-resistant die seat (1); the lower part of the outer wall of the pressure-resistant die seat (1) is a thickened part, the upper part of the outer wall is a thin-walled part, and the thickened part to the thin-walled part is a tapered transition; A wear-resistant lining plate (2) is sleeved in the pressure-resistant die seat (1), a rectangular die cavity (202) is provided at the center thereof, a flange shoulder (203) is provided at the upper end thereof, and the flange shoulder (203) is embedded in the flange sink groove; The bottom mold (3) comprises a base portion (302) and a shaped portion, the base portion (302) being fixed to the backing plate (4), the shaped portion and the base portion (302) being fixedly connected as one body and arranged in the rectangular mold cavity (202), the bottom mold (3) being used to cooperate with the punch (5) up and down to form a predetermined blank shape; The punch (5) and the punch body (6) are fixed to the lower end of the hydraulic motor slide, the punch (5) is fixed to the lower end of the punch body (6), the lower surface of the punch (5) is a precision plane, and the cross-sectional size of the punch (5) matches the rectangular die cavity (202).

2. The titanium alloy electrode block pressing die according to claim 1, characterized in that: The wear-resistant lining plate (2) is composed of two symmetrical long lining plates (204) and two symmetrical short lining plates (205), and the dividing line (206) between the long lining plates (204) and the short lining plates (205) is based on the diagonal line of the rectangular mold cavity (202).

3. The titanium alloy electrode block pressing die according to claim 1, characterized in that: The bottom mold (3) is provided with a corresponding convex angle (301) structure on its shaped portion, the convex angle (301) is wedge-shaped, the bottom surface (3011) of the wedge is fixedly connected to the base portion (302), the outer side surface (3012) of the wedge is perpendicular to the bottom surface, the inner side surface (3013) of the wedge is an inclined surface and a circular arc-shaped curved wall, and the base portion (302) is a flange sheet widened and lengthened based on the lower end of the shaped portion, which is embedded in the positioning groove and fixed to the pad (4) by bolts.

4. The titanium alloy electrode block pressing die according to claim 3, characterized in that: The bottom mold (3) includes three types: a first regular mold, a second regular mold and a third regular mold. A first shaped mold, wherein the shaped portion comprises two symmetrically arranged convex corners (301), the arc-shaped curved walls of the two convex corners (301) are arranged opposite to each other and connected, the arc-shaped curved walls of the two convex corners (301) are combined to form a half circle, and the outer side walls of the two convex corners (301) are in close contact with the opposite side walls of the rectangular mold cavity (202) in the long direction; A second shaped mold, wherein the shaped portion includes a convex corner (301), the outer side wall of the convex corner (301) is in close contact with a side wall of the rectangular mold cavity (202), and the lower end of the arc-shaped curved wall extends to abut against the opposite side wall of the rectangular mold cavity (202), and the arc-shaped curved wall is a quarter of a circle; The third shaped mold has a shaped portion including two symmetrically arranged convex corners (301), the arc-shaped curved walls of the two convex corners (301) are arranged opposite to each other and connected, the arc-shaped curved walls of the two convex corners (301) are combined to form a half circle, and the outer side walls of the two convex corners (301) are in close contact with the opposite side walls of the rectangular mold cavity (202) in the short direction.

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