A wire drawing shell processing mold and method thereof

Abstract

This application relates to the field of power engineering component processing, specifically disclosing a mold and method for manufacturing a cable housing. The method includes steps such as material preparation, shaping, primary water swelling, sawing, secondary shaping, and annealing, and includes the design of corresponding water swelling molds, primary shaping molds, and secondary shaping molds. The cable housing produced by this method overcomes the shortcomings of existing cable housing products produced using cast steel processes.

Description

Technical Field

[0001] The present invention relates to the field of power engineering parts processing, and in particular to a wire drawing housing processing die and a method thereof. Background Art

[0002] Wedge-shaped wire clamps are primarily used to secure conductors, withstand conductor tension, and secure them to tension strings or towers. They are widely used on electrified railway and high-speed rail lines. Conventional wedge-shaped wire clamps consist of a wire-tensioning housing with a wedge-shaped cavity defined within. A clamping block is inserted into the wedge-shaped cavity to secure the conductor. The conductor is clamped between the clamping block and the inner wall of the wedge-shaped cavity, securing the conductor.

[0003] Currently, the forming process of the wire drawing housing is produced by casting steel parts. This processing and production method has some insurmountable shortcomings and is prone to process defects such as air holes, cold shuts, shrinkage, and stress concentration. As a result, the safety factor of the components is reduced and the hidden dangers of accidents are increased. In view of this, the company is considering using pressure processing to process the wire drawing housing as a whole. The whole round tube is pre-processed into a flat tube, and then the flat tube is integrally formed into an intermediate billet. The intermediate billet is shaped and cut to avoid the defects caused by the casting process. However, pressure processing cannot form the wire drawing housing in one go, and a combination of multiple pressure processing is required. Therefore, designing the corresponding mold for multiple processing of the wire drawing housing is one of the difficulties that need to be solved urgently. Summary of the Invention

[0004] The present invention provides a wire drawing housing processing die and method thereof, so as to solve the defects of the existing wire drawing housing production process using steel casting technology.

[0005] To solve the above purpose, the technical solution adopted by the present invention is as follows: a method for processing a wire drawing housing,

[0006] Step 1: Prepare materials: Cut the round tube into flat tube according to the specified length;

[0007] Step 2: Shaping: Place the flat tube into the water-swelling mold and press it tightly with a multi-directional hydraulic press;

[0008] Step 3: Water expansion: Use the cylinders on both sides of the multi-directional hydraulic press to squeeze the water expansion flat tube inward;

[0009] Step 4: Sawing: Cut the flat pipe in the middle after the water rises;

[0010] Step 5: Cutting: Use a laser cutting machine to cut the outer pattern of the flat tube and cut holes;

[0011] Step 6, shaping: replacing the water-swelling mold with the shaping mold, placing the blank to be shaped in the molding cavity, performing the first shaping and the second shaping on the blank to be shaped, the two shapings being completed in the primary shaping mold and the secondary shaping mold respectively. During the shaping process, the primary mold core or the secondary mold core is driven to move toward the middle to extrude and shape the blank to be shaped;

[0012] Step 7, annealing: heat the workpiece to 500-550°C, keep it at this temperature for 2-8 hours, and then cool it to obtain the finished workpiece;

[0013] In addition, a wire drawing housing processing mold is provided, wherein the water swelling mold in step 2 includes a first upper mold, a first lower mold, and a first core mold, wherein the first upper mold and the first lower mold are horizontally provided with spindle-shaped grooves capable of accommodating the flat tube, and the first core mold is provided with a first channel communicating with an external liquid medium;

[0014] The second mold in step 6 includes a second upper mold, a second lower mold, and a second core mold. The second lower mold is provided with a U-shaped groove opening upward, and the bottom center line of the U-shaped groove is raised upward. The second upper mold is provided with a protrusion that can be inserted into the U-shaped groove. The bottom center line of the protrusion is an inverted trapezoid, and the bottom surface of the protrusion is concave upward.

[0015] The basic principle of this scheme is as follows: the upper and lower molds and the core rod of the water-expanding mold are fixed on the longitudinal cylinder and the side cylinder of the multi-directional hydraulic press respectively; the round tube is processed into a flat tube as a whole and then placed in the water-expanding mold of the multi-directional hydraulic press; after the upper and lower molds of the water-expanding mold are closed, when the core rod is squeezed inward, the liquid medium enters the hollow part of the flat tube from the first channel, thereby expanding the flat tube into a semi-finished workpiece and fitting it into the groove of the water-expanding mold; then, the semi-finished workpiece after the pin hole is cut is placed in the second mold, the upper and lower molds of the second mold are closed to further compress and shape the external shape, the second core mold is squeezed along the inner wall of the semi-finished workpiece to shape the inner wall of the semi-finished workpiece, and then the finished workpiece is annealed to eliminate internal stress.

[0016] The beneficial effect of this solution is that it completely overcomes defects existing in the original casting production process, such as pores, cold shuts, shrinkage, and internal stress. The cable casing produced by this application has been tested and tested for flaws and tensile strength, and has a tensile strength far exceeding 99 kN. All technical indicators are far higher than those of cast steel products, which has significantly improved the safety factor and reduced potential risks in use.

[0017] Furthermore, both the primary mold core and the secondary mold core are externally connected with a detachable mold core pressing ring, which further stabilizes the travel path of the core mold.

[0018] Furthermore, before step 2, the process further includes lubricating the inner surface of the water-swelling mold with graphite powder, so as to utilize the lubricating property of the graphite powder to assist in demolding the workpiece from the mold.

[0019] Furthermore, before step 7, the process also includes chamfering the openings at both ends of the workpiece to make the inner and outer edges of both ends of the workpiece smooth.

[0020] Furthermore, the round tube in step 1 is a Q355 seamless round tube. Q355 material has the advantages of high strength, good comprehensive performance, long service life, wide application range, and relatively economical.

[0021] Furthermore, before step 3, the outer surface of the flat tube is covered with a waterproof film to fill the gap between the flat tube and the internal space of the water-swelling mold and prevent the high-pressure liquid medium injected by the water-swelling mold from seeping out of the mold gap.

[0022] Furthermore, in step 3, the liquid pressure used for the multi-directional hydraulic press to increase the pressure is 20-30 MPa. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of an intermediate body in an embodiment of the present invention;

[0024] Figure 2 Schematic diagram of a blank to be shaped in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the finished product of the wire drawing housing.

[0026] Figure 4 Schematic diagram of a water-swelling mold according to an embodiment of the present invention;

[0027] Figure 5 This is a front view of a water swelling mold in an embodiment of the present invention;

[0028] Figure 6 A side view of a water swelling mold according to an embodiment of the present invention;

[0029] Figure 7 for Figure 6 The CC section view in the figure;

[0030] Figure 8 Schematic diagram of a one-time shaping mold in an embodiment of the present invention;

[0031] Figure 9 A partial schematic diagram of a one-step shaping mold according to an embodiment of the present invention;

[0032] Figure 10 Schematic diagram of the second lower mold of the one-step shaping mold in an embodiment of the present invention;

[0033] Figure 11 Schematic diagram of a primary pressing die ring of a primary shaping die in an embodiment of the present invention;

[0034] Figure 12 Schematic diagram of a secondary shaping die in an embodiment of the present invention;

[0035] Figure 13 Schematic diagram of the front view of the secondary shaping die in an embodiment of the present invention;

[0036] Figure 14 Schematic diagram of a first-time shaped workpiece after one-time shaping in an embodiment of the present invention;

[0037] Figure 15 Schematic diagram of the secondary mold core pressing ring of the secondary shaping mold in an embodiment of the present invention;

[0038] Figure 16 Schematic diagram of the secondary mold core of the secondary shaping mold in an embodiment of the present invention. DETAILED DESCRIPTION

[0039] The following is further described in detail through specific implementation methods:

[0040] The reference numerals in the drawings of the specification include: first upper die 1, first lower die 2, core rod 3, first die groove 4, second die groove 5, ejector channel 6, first groove 7, second upper die 101, first mounting groove 1011, second lower die 102, second mounting groove 1021, primary upper forming cavity 103, primary lower forming cavity 104, primary die core 105, primary conical buffer head 106, first limiting platform 107, second limiting platform 108, boss 1091, second groove 109 92, intermediate body 201, first ejector hole 202, primary first through groove 2031, primary first oblique groove 2032, primary second through groove 2033, primary second oblique groove 2034, third through groove 2035, primary fourth through groove 2036, primary third oblique groove 2037, primary fifth through groove 2038, primary fourth oblique groove 2039, primary sixth through groove 2030, primary through hole 204, primary mounting hole 205, primary limiting groove 206, primary die Core pressing ring 207, third upper mold 301, first step 3011, second step 3012, third step 3013, third lower mold 302, secondary upper molding cavity 303, secondary first through-groove 3031, secondary first oblique groove 3032, secondary second through-groove 3033, secondary second oblique groove 3034, secondary third through-groove 3035, secondary lower molding cavity 304, secondary fourth through-groove 3041, secondary third oblique groove 3042, secondary fourth oblique groove 304 3. Secondary fifth through groove 3044, groove 305, secondary mold core pressure ring 306, secondary mold core 307, large end 3071, small end 3072, secondary conical buffer head 308, third limiting platform 309, secondary ejector hole 401, chamfer 402, blind hole 403, secondary through hole 404, secondary mounting hole 405, secondary limiting groove 406, first shaping workpiece 501, first side surface 5011, second side surface 5012, large head 5013, small head 5014.

[0041] The embodiment is basically as shown in the attached Figure 1 To the attached Figure 16 As shown:

[0042] Here's how to make a wire housing:

[0043] Step 1: Prepare materials: Cut the round tube into a flat tube at 105% to 110% of the volume of the two molded parts after molding. In this embodiment, a Q355 round tube with a length of 550 mm is selected;

[0044] Step 2: Molding: Place the flat tube into the spindle-shaped second groove mold of the first lower mold of the water swelling mold, and close the upper and lower molds and press them tightly;

[0045] Step 3, water swelling: smear graphite powder inside the water swelling mold, and wrap the waterproof film around the outside of the flat tube. Put the flat tube into the second die groove 5 in the first lower mold 2. The core rod 3 of the water swelling mold seals both ends of the flat tube, and pressurizes the liquid medium into the flat tube through the first channel of the core rod 3. The intermediate blank is formed by water swelling. Figure 1 As shown, the pressure of the liquid medium is 20~30Mpa;

[0046] Step 4: sawing: after taking out the intermediate blank, saw it from the center to obtain two blanks to be shaped;

[0047] Step 5: Cutting: Use a laser cutting machine to cut the side wall opening of the flat tube and cut holes to obtain a blank to be shaped with a material volume equal to the volume of the wire drawing shell material after forming;

[0048] Step 6, shaping: replacing the water-swelling mold with the shaping mold, placing the blank to be shaped in the molding cavity, performing the first shaping and the second shaping on the blank to be shaped, the two shapings being completed in the primary shaping mold and the secondary shaping mold respectively. During the shaping process, the primary mold core or the secondary mold core is driven to move toward the middle to extrude and shape the blank to be shaped;

[0049] Step 7, annealing: heat the workpiece to 500-550℃, keep it at this temperature for 2-8 hours, then let it cool naturally in the air to obtain the following Figure 6 The finished workpiece is shown.

[0050] Water-swelling mold: Figures 4-7 As shown, the first upper mold 1 and the first lower mold 2 are both rectangular blocks, and the opposite ends of the first upper and lower molds are respectively machined to form a horizontal first mold groove 4 and a second mold groove 5. The first mold groove 4 and the second mold groove 5 are symmetrical structures. The shapes of the first mold groove 4 and the second mold groove 5 are spindle-shaped. After the first upper and lower molds are closed, the first mold groove 4 and the second mold groove 5 form a shape that can fit together as shown in FIG. Figure 1The cavity is in the shape of the intermediate blank shown. An ejector pin channel 6 is provided at the center line of the second die groove 5 and vertically penetrates the first lower die 2. The ejector pin channel 6 is used to accommodate an external ejector pin. When the external ejector pin is placed into the ejector pin channel from bottom to top, the wire housing in the first lower die is lifted and separated.

[0051] The ends of the first and second die grooves 4 and 5 combine to form an elliptical opening that conforms to the shape of the flat tube. Mandrels 3, mounted horizontally at the ends of the first upper and lower dies, are elliptical cylinders that conform to the inner walls of the openings. A hydraulic cylinder drives the two mandrels 3 horizontally toward each other, causing them to contact the ends of the flat tube. A first channel (not shown) runs horizontally through the mandrel 3 and connects to the external hydraulic expansion medium. This mold is mounted on a multi-directional hydraulic press. A YLST three-way hydraulic forming press from Wenzhou Yili Machinery Co., Ltd. is equipped with hydraulic cylinders on the top and left and right sides. The top hydraulic cylinder descends, closing the first upper die 1 and the first lower die 2. High-pressure water is then injected into the cavity through the first channel, causing hydraulic expansion molding. A first groove 7 is provided parallel to the length of the first upper and lower dies 1 and 2, securing the first and lower dies to the multi-directional hydraulic press.

[0052] The process for using a hydraulic expansion mold is as follows: After the first upper mold 1, first lower mold 2, and core rod 3 are secured to a multi-directional hydraulic press, a flat tube is placed in the second die groove 5, with the ends of the mold cavity aligned with the shape of the flat tube. The multi-directional hydraulic press is then activated to press down on the first upper mold 1, closing the first and lower molds. The left and right core rods 3 are then pushed horizontally into the cavity, abutting the ends of the flat tube. Liquid is introduced into the cavity through the first channel, and the two core rods 3 gradually move toward each other. Under pressure, the center of the flat tube expands and deforms, contacting the first and second die grooves 4 and 5, completing the hydraulic expansion shaping. To remove the workpiece after the hydraulic expansion, the first and lower molds are separated, and an external ejector pin is inserted into the ejector channel 6 to lift the workpiece, allowing it to be removed.

[0053] One-time plastic mold: such as Figures 8-11As shown, it includes a second upper mold 101 and a second lower mold 102. The upper end of the second upper mold 101 is provided with a first installation groove 1011 for installing and positioning the second upper mold 101 when it is installed on a multi-directional hydraulic press. The lower end of the second upper mold 101 is provided with a primary upper molding cavity 103. The primary upper molding cavity 103 includes an upper side and a lower side. The upper side is connected in sequence by a primary first through groove 2031, a primary first oblique groove, a primary second through groove 2033, and a primary second oblique groove 2034. 034 and a first third channel, the lower side is composed of a first fourth through groove 2036, a first third oblique groove 2037, a first fifth through groove 2038, a first fourth oblique groove 2039 and a first sixth through groove 2030 which are connected in sequence, the first lower molding cavity 104 matches the first upper molding cavity 103 and has the same shape, when the second upper mold 101 is buckled with the second lower mold 102, the first upper molding cavity 103 and the first lower molding cavity 104 form a closed molding cavity. The molding cavity is symmetrical along the center line of the mold. Therefore, the inclination angles of the first oblique groove 2032 and the second oblique groove 2034 on the upper side are consistent, and the inclination angle can be set according to the requirements of the final product, and the inclination angle can be 10°-12°, and the inclination angles of the first third oblique groove 2037 and the first fourth oblique groove 2039 on the lower side are consistent, and the inclination angle can be set according to the requirements of the final product, and can be 40°-47°.At the same time, convex blocks are integrally formed on the four corners of the lower end of the second upper mold 101, and second grooves 1092 are processed at the corresponding positions of the second lower mold 102. When the second upper mold 101 and the second lower mold 102 are buckled together, the convex blocks match the second grooves 1092 to realize the clamping of the second upper mold 101 and the second lower mold 102, and at the same time limit the downward stroke of the second upper mold 101, so as to achieve the purpose of adjusting the size of the intermediate blank 201. A groove 1092 is provided at the lower end of the second lower mold 102 for fixing the second lower mold 102 on the multi-directional hydraulic press when the second lower mold 102 is installed on the multi-directional hydraulic press. The second mounting groove 1021 on the multi-directional hydraulic press is provided. Furthermore, two second-first ejector holes 202 are machined in the molding cavity of the second lower mold 102, symmetrically about the centerline of the primary molding cavity 104. When the second lower mold 102 is mounted on the multi-directional hydraulic press, the second-first ejector holes 202 cooperate with the ejector pins to position the second lower mold 102. Furthermore, the ejector pins installed in the second-first ejector holes 202 can lift the intermediate body 201 after machining it, facilitating removal of the finished intermediate body 201 from the mold.

[0054] The mold core 105 is a mold core having a shape that is a function of shaping the inner hole and adjusting the size of the intermediate blank 201. The shape of the mold core 105 is the shape that the intermediate blank 201 needs to be processed into in the end. When the mold core 105 is shaping the inner hole and adjusting the size of the intermediate blank 201, it extends into the middle of the intermediate blank 201 from the small end 1052. A conical buffer head 106 is integrally formed at the end of the mold core 105 that does not extend into the middle of the intermediate blank 201. The inclination angle of the conical buffer head 106 can be 19°~21°, for example, 20°. The mold core pressing ring 207 is also included for fixing the mold core 105. A mounting hole 205 having the same shape as the conical buffer head 106 and matching the conical buffer head is provided in the center of the mold core pressing ring 207. 07 is provided with a primary through hole 204 for fixing the primary mold core pressure ring 207 to the multi-directional hydraulic press. In order to better realize the fixed installation of the primary mold core 105 and the primary mold core pressure ring 207, a first limit platform 107 is integrally formed at the other end of the conical buffer head 106. At the same time, in order to avoid the misalignment of the primary mold core 105 caused by the rotation of the primary mold core 105 after the primary mold core pressure ring 207 and the primary mold core 105 are installed, which leads to the inability of the multi-directional hydraulic press to drive the primary mold core 105 to extend into the middle of the first shaping workpiece, after the primary mold core pressure ring 207 and the primary mold core 105 are installed, a primary limit groove 206 matching the limit platform is provided at the corresponding position of the limit platform. When the primary mold core 105 is installed in the primary mold core pressure ring 207, the primary mold core 105 is limited by the cooperation of the primary limit groove 206 and the first limit platform 107.

[0055] The process of using the primary shaping mold is as follows: the second upper mold 101 and the second lower mold 102 are fixedly installed on the multi-directional hydraulic press through the first installation groove 1011 and the second installation groove 1021. The primary upper molding cavity 103 of the installed second upper mold 101 is directly opposite to the primary lower molding cavity 104 of the second lower mold 102. Then the primary mold core 105 is passed through the primary installation hole 205 of the primary mold core pressing ring 207 so that the conical buffer head of the primary mold core 105 is aligned with the primary mold core pressing ring 207. 7, the first limiting platform 107 of the primary mold core 105 is fixed in the primary limiting groove 206 of the primary mold core pressing ring 207, and then the primary mold core pressing ring 207 is installed on the multi-directional hydraulic press, so that the center point of the primary mold core pressing ring 207 and the primary mold core 105 after installation is in a straight line with the central axis of the molding cavity formed when the second upper mold 101 and the second lower mold 102 are buckled together, and then the intermediate blank 201 is placed in the primary lower molding cavity 10 4, and then start the multi-directional hydraulic press to drive the second upper mold 101 to press down. After the second upper mold 101 and the second lower mold 102 are buckled together, the primary mold core 105 is driven to move toward the middle. In the process of moving the primary mold core 105 toward the middle of the intermediate blank 201, the intermediate blank 201 is continuously expanded so that the intermediate blank 201 is fitted with the cavity wall of the forming cavity, completing the first shaping of the intermediate blank 201. At the same time, the primary mold core 105 squeezes the excess material in the middle of the intermediate blank 201 out of the middle of the intermediate blank 201, completing the shaping of the inner hole of the intermediate blank 201. Under the control of the second upper mold 101, the second lower mold 102 and the primary mold core 105, the inner hole shaping and size adjustment of the workpiece are completed, ensuring that the deformation of the intermediate blank 201 during the processing is within the controllable range of deformation, thereby reducing the probability that the intermediate blank 201 will be scrapped during the shaping process. Since the thickness of the intermediate blank 201 is greater than or equal to the height of the molding cavity in the primary shaping mold, when the second upper mold 101 is pressed down, the molding cavity of the second upper mold 101 directly contacts the plane of the intermediate blank 201 to fix the intermediate blank 201, and prevent the intermediate blank 201 from moving in the molding cavity under the action of the primary mold core 105 when the primary mold core 105 extends into the middle of the intermediate blank 201, so as to facilitate the primary mold core 105 to extend into the middle of the intermediate blank 201 to perform the first shaping of the intermediate blank 201.

[0056] Secondary shaping mold:

[0057] After the first plastic mold shaping, Figure 14The first side surface 5011 and the inclination angle and size of the first side surface 5011 of the first shaping workpiece 501 need to be adjusted again. In order to avoid the first side surface 5011 and the second side surface 5012 being adjusted at the same time, the deformation amount is large, which may cause the first shaping workpiece 501 to be scrapped during the processing. Therefore, when designing the second shaping mold, the inclination angle of the secondary third oblique groove 3042 and the secondary fourth oblique groove 3043 of the secondary lower molding cavity 304 can be set to be less than or equal to the corresponding angle of the oblique surface in the second side surface 5012 of the final product, so that the secondary lower molding cavity 304 is more fitted with the first shaping workpiece 501, ensuring that the second side surface 5012 does not deform or the deformation amount is small during the downward extrusion of the third upper mold 301, thereby reducing the scrap rate of the product during the processing, and at the same time ensuring that the size of the first side surface 5011 and the inclination angle of the oblique surface of the second shaping workpiece after shaping are consistent with the requirements of the final product.

[0058] like Figure 12-16As shown, the secondary shaping mold includes a third upper mold 301 and a third lower mold 302. The third upper mold 301 includes a first step 3011, a second step 3012, and a third step 3013 that gradually narrow from top to bottom. The first step 3011 is engaged with the multidirectional hydraulic press when the third upper mold 301 is installed on the multidirectional hydraulic press to prevent the third upper mold 301 from shaking when the multidirectional hydraulic press is started to drive the third upper mold 301 to press downward. The second step 3012 is engaged with the upper surface of the third lower mold 302 during the process of the third upper mold 301 pressing downward to limit the downward stroke of the third upper mold 301. The lower end of the third step 3013 is provided with a secondary upper forming cavity 303, and the secondary upper forming cavity 303 includes a secondary first through groove 3031, a secondary first oblique groove 3032, a secondary second through groove 3033, a secondary second oblique groove 3034, and a secondary third through groove 3035 which are sequentially connected along the axial direction, and the inclination angle of the secondary second oblique groove 3034 is set to 11°~11.5°, for example, 11.4°. A blind hole 403 is provided at the upper end of the third upper mold 301 to facilitate positioning when the third upper mold 301 is installed on the multi-directional hydraulic press; the upper end of the third lower mold 302 is provided with a secondary lower forming cavity The secondary lower molding cavity 304 includes a secondary fourth through groove 3041, a secondary third oblique groove 3042, a secondary fourth oblique groove 3043 and a secondary fifth through groove 3044 which are sequentially connected along the axial direction, and the inclination angle of the secondary fourth oblique groove 3043 is set to 40°~45.5°, for example, 45.5°. When the third upper mold 301 and the third lower mold 302 are buckled together, the secondary upper molding cavity 303 and the secondary lower molding cavity 304 constitute a molding cavity in a closed state, and the molding cavity is symmetrical along the center line of the mold, and a groove is provided at the upper end opening of the secondary lower molding cavity 304 to facilitate the third upper mold 3 01, the third step 3013 extends into the chamfer 402, and a symmetrical groove 305 is provided at the lower end of the third lower mold 302, which is convenient for fixing the third lower mold 302 when it is installed on the multi-directional hydraulic press, and a secondary ejector hole 401 is provided at the center of the secondary lower molding cavity 304. When the third lower mold 302 is installed, the secondary ejector hole 401 can be used for positioning. At the same time, after the mold completes processing of the first shaping workpiece 501, the ejector in the secondary ejector hole 401 can lift the second shaping workpiece, which is convenient for the staff to remove the processed second shaping workpiece from the molding cavity.

[0059] The mold core 307 is further comprised of a secondary mold core 307 for shaping the middle portion of the first shaping workpiece 501. The shape of the secondary mold core 307 is consistent with the shape of the molding cavity. The secondary mold core 307 extends into the middle portion of the first shaping workpiece 501 during operation. The small end 3072 of the secondary mold core 307 extends into the middle portion of the first shaping workpiece 501. The large end 3071 of the secondary mold core 307 is integrally formed with a conical buffer head. There is also a secondary mold core 307 pressure ring 306 for fixing the secondary mold core 307. A secondary mounting hole 405 consistent with the shape of the conical buffer head is provided at the center of the secondary mold core 307 pressure ring 306. Moreover, the secondary mold core 307 can be fitted into the secondary mounting hole 405. In order to achieve the fixation of the secondary mold core 307 and the secondary mold core 307 pressure ring 306, a limiting platform is integrally formed at the other end of the conical buffer head of the secondary mold core 307. At the same time, in order to avoid To avoid the secondary mold core 307 rotating and causing misalignment after the secondary mold core 307 pressure ring 306 and the secondary mold core 307 are installed, which leads to the multi-directional hydraulic press being unable to drive the secondary mold core 307 to extend into the middle of the first shaping workpiece 501, therefore, a limiting groove is provided at the corresponding position of the limit platform after the secondary mold core 307 pressure ring 306 and the secondary mold core 307 are installed, and a secondary through hole 404 is provided around the secondary installation hole 405 of the secondary mold core 307 pressure ring 306. The secondary mold core 307 pressure ring 306 and the multi-directional hydraulic press can be fixedly installed in the secondary through hole 404 by means of bolts, locating pins, etc. At the same time, the secondary mold core 307 pressure ring 306 and the secondary mold core 307 are set to a detachable mode, so that when the size of the secondary mold core 307 needs to be changed, only the secondary mold core 307 needs to be replaced, and the secondary mold core 307 pressure ring 306 can be reused.

[0060] The use process of the second plastic mold: install the third upper mold 301 and the third lower mold 302 on the multi-directional hydraulic press, pass the secondary mold core 307 through the secondary mounting hole 405 of the secondary mold core 307 pressure ring 306 and fix it together with the secondary mold core 307 pressure ring 306, then fix the secondary mold core 307 pressure ring 306 on the multi-directional hydraulic press, the secondary upper molding cavity 303 of the third upper mold 301 is opposite to the secondary lower molding cavity 304 of the third lower mold 302, install the secondary mold core 307 into the secondary mold core 307 pressure ring 306, so that the limit table is clamped in the limit groove, and the conical buffer table is fitted with the secondary mounting hole 405, then fix the secondary mold core 307 pressure ring 306 on the multi-directional hydraulic press so that the center point of the secondary mold core 307 pressure ring 306 is buckled between the third upper mold 301 and the third lower mold 302 The first shaping workpiece 501 is placed on the central axis of the shaping cavity formed at the time of the molding. Then, the first shaping workpiece 501 is placed in the secondary lower molding cavity 304 with the small head 5014 close to the middle of the mold, the large head 5013 facing outward, and the second side surface 5012 touching the ground of the secondary lower molding cavity 304. Then, the multi-directional hydraulic press is started to control the third upper mold 301 to press downward. When the secondary upper molding cavity 303 of the third upper mold 301 touches the first shaping workpiece 501, the secondary mold core 307 is controlled to extend into the middle of the first shaping workpiece 501, and then the third upper mold 301 is controlled to continue to press downward. When the second step 3012 of the third upper mold 301 is pressed down to touch the upper surface of the third lower mold 302, it is no longer pressed downward. At this time, the secondary mold core 307 is controlled to squeeze back and forth in the first shaping workpiece 501 to squeeze out the corresponding material to achieve in-hole shaping.

[0061] When the mold in the present application is set up, the inclination angles of the secondary third oblique groove 3042 and the secondary fourth oblique groove 3043 in the secondary lower molding cavity 304 are set to be smaller than the inclination angle required by the final product, so that when the first shaping workpiece 501 is placed in the secondary lower molding cavity 304, the second side surface 5012 is more closely fitted with the bottom surface of the secondary lower molding cavity 304, thereby reducing the deformation amount of the second side surface 5012 when the third upper mold 301 is extruded, thereby reducing the probability of scrapping when the second shaping mold in the present application processes the first shaping workpiece 501.

[0062] The primary mold core and the secondary mold core are externally sleeved with a detachable fixed outer sleeve, and the secondary mold core pressure ring is annular, so that the core mold can only move horizontally along the secondary mold core pressure ring.

[0063] The above is only an embodiment of the present invention, and the common knowledge such as the specific structure and characteristics of the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A wire drawing shell processing mold, characterized by: Including water swelling mold and plastic mold; The water-swelling mold includes a first upper mold and a first lower mold. The first upper mold has a first mold groove that can fit the intermediate blank, and the first lower mold has a second mold groove that can fit the intermediate blank. The first mold groove and the second mold groove can be combined to form a spindle-shaped intermediate blank. The first mold groove and the second mold groove are respectively inserted at both ends of the first mold groove and the second mold groove, and the mandrels are provided with a first channel that can be connected to an external liquid medium. The shaping mold includes a primary shaping mold and a secondary shaping mold, the primary shaping mold includes a second upper mold and a second lower mold, the lower end of the second upper mold is provided with a primary upper molding cavity, the primary molding cavity includes an upper side and a lower side, the upper side includes a primary first through-groove, a primary first oblique groove, a primary second through-groove, a primary second oblique groove and a primary third channel that are connected in sequence, the lower side includes a primary fourth through-groove, a primary third oblique groove, a primary fifth through-groove, a primary fourth oblique groove and a primary sixth through-groove that are connected in sequence, a primary lower molding cavity that matches the primary upper molding cavity and has the same shape as the primary lower mold is provided at the upper end of the second lower mold, the primary upper molding cavity and the primary lower molding cavity cooperate to form a molding cavity in a closed state, the molding cavity is divided into a left molding cavity and a right molding cavity along the center line of the mold, and also includes two primary mold cores with the same shape as the left molding cavity; The secondary shaping mold includes a third upper mold and a third lower mold. A secondary upper molding cavity is provided at the lower end of the third upper mold. The secondary upper molding cavity includes a secondary first through groove, a secondary first oblique groove, a secondary second through groove, a secondary second oblique groove and a secondary third through groove which are connected in sequence along the axial direction; a secondary lower molding cavity is provided at the upper end of the third lower mold. The secondary lower molding cavity includes a secondary fourth through groove, a secondary third oblique groove, a secondary fourth oblique groove and a secondary fifth through groove which are connected in sequence along the axial direction; the secondary upper molding cavity and the secondary lower molding cavity cooperate to form a molding cavity in a closed state. The molding cavity is symmetrical along the center line of the mold, and also includes two secondary mold cores with the same shape as half of the molding cavity.

2. A wire drawing housing processing mold according to claim 1, characterized in that: Both the primary mold core and the secondary mold core are externally connected with a detachable mold core pressing ring.

3. A method for processing a wire drawing housing using the wire drawing housing processing mold according to claim 1, characterized in that: Step 1. Prepare materials: Cut the round tube into flat tubes at 105%~110% of the volume of the two molded parts after molding; Step 2: Molding: placing the flat tube into the spindle-shaped second groove mold of the first lower mold of the water swelling mold, and clamping the first upper mold and the first lower mold together; Step 3, water swelling: The core rod of the water swelling mold seals both ends of the flat tube, and pressurizes the liquid medium into the flat tube through the first channel of the core rod to form an intermediate blank by water swelling. The pressure of the liquid medium is 20-30 MPa. Step 4: sawing: after taking out the intermediate blank, saw it from the center to obtain two blanks to be shaped; Step 5: Cutting: Use a laser cutting machine to cut the side wall opening of the flat tube and cut holes to obtain a blank to be shaped with a material volume equal to the volume of the wire drawing shell material after forming; Step 6, shaping: replacing the water-swelling mold with the shaping mold, placing the blank to be shaped in the forming cavity, performing the first shaping and the second shaping on the blank to be shaped, the two shapings being completed in the primary shaping mold and the secondary shaping mold respectively. During the shaping process, the primary mold core or the secondary mold core is driven to move toward the middle to extrude and shape the blank to be shaped; Step 7: Annealing: Heat the workpiece to 500-550°C, keep it at this temperature for 2-8 hours, and then cool it to obtain the finished workpiece.

4. The method for processing a wire housing according to claim 3, wherein: Before step 2, the method further includes lubricating graphite powder on the inner surface of the water swelling mold.

5. The method for processing a wire housing according to claim 3, wherein: Before step 7, the process also includes chamfering the openings at both ends of the workpiece.

6. The method for processing a wire housing according to claim 3, wherein: The round tube in step 1 is a Q355 seamless round tube.

7. The method for processing a wire housing according to claim 3, wherein: Before step 3, the process also includes wrapping a waterproof membrane around the outer surface of the flat tube.

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