Injection molding head recess cold heading die

Abstract

The application discloses a cold heading die for head recess of an injection molding part and relates to the technical field of forming machine tools.The cold heading die comprises a cold heading operation base, a cold heading forming frame, a plurality of cold heading units, a plurality of pressure applying units and a plurality of workpieces, the cold heading forming frame is installed at the top of the cold heading operation base, the plurality of cold heading units and the plurality of pressure applying units are symmetrically installed at the two sides of the cold heading forming frame respectively, the plurality of cold heading units and the plurality of pressure applying units are used for cold heading workpieces, a plurality of material turning assemblies are arranged on the cold heading operation base, and each material turning assembly comprises two guide rods.Through the operation of the material turning assemblies, the workpieces can be turned over, automatically carried to next cold heading processing positions and positioned without manual repositioning or additional complex operation, thereby saving the time consumed for repositioning, enabling the cold heading machine to continuously and quickly process the two ends of the workpieces and greatly improving the production output per unit time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of forming machine tools, in particular to a cold heading die for head groove of injection molded part. BACKGROUND

[0002] The cold heading machine is a forming machine tool mainly using a punch, which extrudes and forms metal materials by using a die. The metal bar or wire is subjected to high pressure in the die and gradually forms the required part shape through multiple stamping and heading.

[0003] Some existing cold heading machines do not have the function of turning the material during processing when machining the two ends of the cold heading forming die for producing the head groove of the injection molded part. The die of the cold heading machine is usually designed for specific processing steps and shapes. In the traditional cold heading process, the die can only apply pressure to the material from one end and perform forming operation. Therefore, when the cold heading process needs to be performed on both ends of the material, the material that has been subjected to cold heading on one end needs to be reloaded and subjected to cold heading on the other end. As a result, the material that has completed cold heading on one end needs to be reloaded, positioned and clamped each time, which consumes a lot of time and reduces the production efficiency of the cold heading machine.

[0004] Therefore, a cold heading die for head groove of injection molded part is provided. SUMMARY

[0005] The present application aims to provide a cold heading die for head groove of injection molded part to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a cold heading die for head groove of injection molded part, comprising a cold heading operation base, a cold heading forming frame, a plurality of cold heading units, a plurality of pressure applying units and a plurality of workpieces. The cold heading forming frame is installed on the top of the cold heading operation base. The plurality of cold heading units and the plurality of pressure applying units are symmetrically installed on both sides of the cold heading forming frame. The plurality of cold heading units and the plurality of pressure applying units are used for cold heading the workpieces. A plurality of material turning assemblies are arranged on the cold heading operation base. Each material turning assembly comprises two guide rods which are symmetrically fixedly connected to the top of the cold heading operation base. A cross plate is slidably connected to the two guide rods. A spring is arranged on each of the two guide rods. A vertical plate is fixedly connected to the top surface of the cross plate. Three guide grooves are linearly arranged on the vertical plate. A Z-shaped shaft is slidably arranged in each of the three guide grooves. A sleeve block is rotatably connected to the end of each Z-shaped shaft close to the cross plate.

[0007] Further, the vertical plate is fixedly connected with three support plates in a linear array, one spring two is fixedly connected to each of the side of the three support plates close to the sleeve block, one connecting rod is fixedly connected to the three sleeve blocks, the hydraulic rod is fixedly connected to the top end of the cold heading forming frame, the extension end of the hydraulic rod faces downward, the extension end of the hydraulic rod is fixedly connected with a top inclined plate, the end of the sleeve block away from the spring one is fixedly connected with a bottom inclined plate, the top end of the top inclined plate is fixedly connected with a pressing plate on the side close to the vertical plate, three guide blocks are slidingly connected to the vertical plate, one bearing plate is fixedly connected to the end of each of the three Z-shaped shafts away from the sleeve block, two rotating rods are fixedly connected to the end of each of the three bearing plates away from the Z-shaped shaft, six rotating rods are provided, one arc-shaped clamping plate is rotatably connected to each of the six rotating rods, one arc-shaped electromagnet is fixedly connected to the same side of each of the six arc-shaped clamping plates away from the bearing plate, one spring three is fixedly connected between each of the six arc-shaped clamping plates and the adjacent bearing plate, and one annular electromagnet is fixedly connected to the output end of each of the cold heading pressing columns of each pressure applying unit.

[0008] Further, the two ends of the spring one are fixedly connected with the bottom surface of the horizontal plate and the top surface of the cold heading operation base respectively.

[0009] Further, the number of guide grooves corresponds to the number of cold heading units and pressure applying units.

[0010] Further, the top part of the guide groove is provided as a horizontal groove, and the middle part of the guide groove is provided as a semicircular groove protruding downward.

[0011] Further, the Z-shaped shaft is rotatably connected with the bottom end of the adjacent guide block.

[0012] Further, the end of each of the three springs two away from the support plate is fixedly connected with the sleeve block on the same side.

[0013] Further, the top inclined plate is provided as a shape with the bottom inclined and the top vertical.

[0014] Further, the bottom inclined plate is provided as an inclined surface, the inclined surface of the bottom inclined plate and the inclined surface of the top inclined plate are complementarily arranged, and the top inclined plate and the bottom inclined plate are in extrusion fit.

[0015] Further, the pressing plate extends to the top of the vertical plate, the vertical plate is in the downward movement path of the pressing plate, and the arc-shaped electromagnet and the annular electromagnet are all started by an external controller.

[0016] Compared with the prior art, the beneficial effects of the present application are:

[0017] Through the operation of the turnover assembly, the workpiece can be turned over and automatically transported to the next cold heading processing position without the need for manual or additional complex operations to reposition the workpiece, thereby saving the time consumed for recharging, enabling the cold heading machine to continuously and quickly process the two ends of the workpiece, and greatly improving the production output per unit time.

[0018] By two arc-shaped clamping plates clamping the workpiece completely to the horizontal state in the process of workpiece turning over and automatic handling to the next cold heading processing position, the coaxial correspondence of the workpiece after turning over with the cold heading pressure column and the cold heading groove can be ensured, the positioning accuracy of the workpiece during cold heading processing at both ends can be ensured, thereby the size accuracy and relative position accuracy of both ends of the product can be ensured, and the overall quality stability of the cold heading mold is improved.

[0019] By the magnetic attraction of the annular electromagnet to the workpiece, the workpiece can be smoothly taken out of the forming groove of the cold heading unit, the workpiece after cold heading can be quickly taken out of the mold, the demolding time is reduced, the cold heading machine can perform the next cold heading operation faster, and the working efficiency of the equipment is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic view of the overall device of the application;

[0021] Figure 2 It is an enlarged schematic view of A in the application; Figure 1

[0022] Figure 3 It is a schematic view of the structure of the cold heading operation base, the cold heading forming frame and the like in the transverse section;

[0023] Figure 4 It is an enlarged schematic view of B in the application; Figure 3

[0024] It is a schematic view of the structure of the vertical plate, the guide groove and the like in the application; Figure 5

[0025] It is a schematic view of the structure of the hydraulic rod, the workpiece and the like in the application; Figure 6

[0026] It is an enlarged schematic view of C in the application; Figure 7 Figure 6 It is a schematic view of the structure of the vertical plate, the guide groove and the Z-shaped rotating shaft in the application;

[0027] Figure 8 It is an enlarged schematic view of D in the application;

[0028] Figure 9 Figure 8 It is an enlarged schematic view of E in the application.

[0029] Figure 10 Figure 8

[0030] In the figure:

[0031] 11, cold heading operation base; 12, cold heading forming frame; 13, cold heading unit; 14, pressure applying unit; 15, workpiece;​​​​​

[0032] 21, guide rod; 22, cross plate; 23, spring one; 24, vertical plate; 25, guide groove; 26, Z-shaped rotating shaft; 27, sleeve block; 28, support plate; 29, spring two; 210, connecting rod; 211, hydraulic rod; 212, top inclined plate; 213, bottom inclined plate; 214, pressing plate; 215, guide block; 216, bearing plate; 217, rotating rod; 218, arc-shaped clamping plate; 219, arc-shaped electromagnet; 220, spring three; 221, annular electromagnet. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0034] The embodiments provided by the present application include the following aspects.

[0035] Please refer to Figures 1 to 10 As shown in the drawings, a cold heading die for a head recess of an injection molded part includes a cold heading operation base table 11, a cold heading forming frame 12, a plurality of cold heading units 13, a plurality of pressure applying units 14, and a plurality of workpieces 15. The cold heading forming frame 12 is installed on the top of the cold heading operation base table 11. The plurality of cold heading units 13 and the plurality of pressure applying units 14 are symmetrically installed on the two sides of the cold heading forming frame 12, respectively. The plurality of cold heading units 13 and the plurality of pressure applying units 14 are used for cold heading processing of the cold heading workpieces 15.

[0036] Among them: the cold heading unit 13 includes a forming groove for cold heading forming, and a ejector pin for demolding.

[0037] Among them: the pressure applying unit 14 includes a cold heading pressure column for applying pressure. The cold heading pressure column is controlled to start by an external controller arranged on the cold heading operation base table 11.

[0038] Among them: the workpiece 15 is arranged here as a die for cold heading manufacturing of an injection molded part head recess.

[0039] Among them: the cold heading forming frame 12 is provided with a through groove on the top. The through groove can be connected with a feeding device to deliver the workpiece 15 to be cold heading processed to the cold heading die.

[0040] The cold upsetting operation base table 11 is provided with a plurality of turnover assemblies, the turnover assembly comprises two guide rods 21, the two guide rods 21 are fixedly connected to the top of the cold upsetting operation base table 11 in a symmetrical mode, a horizontal plate 22 is slidably connected to the two guide rods 21 in a common mode, a spring one 23 is sleeved on each of the two guide rods 21, the two ends of the spring one 23 are fixedly connected with the bottom surface of the horizontal plate 22 and the top surface of the cold upsetting operation base table 11 respectively, a vertical plate 24 is fixedly connected to the top surface of the horizontal plate 22, three guide grooves 25 are linearly arranged on the vertical plate 24, a Z-shaped rotating shaft 26 is slidably arranged in each of the three guide grooves 25, a sleeve block 27 is rotatably connected to the end of each of the three Z-shaped rotating shafts 26 close to the horizontal plate 22, three supporting plates 28 are fixedly connected to the vertical plate 24 in a linear array mode, a spring two 29 is fixedly connected to the side of each of the three supporting plates 28 close to the sleeve block 27, the end of each of the three spring twos 29 away from the supporting plate 28 is fixedly connected with the same side sleeve block 27, a connecting rod 210 is fixedly connected to the three sleeve blocks 27 in a common mode, a hydraulic rod 211 is fixedly connected to the top end of the cold upsetting forming frame 12, the telescopic end of the hydraulic rod 211 is downward, a top inclined plate 212 is fixedly connected to the telescopic end of the hydraulic rod 211, a bottom inclined plate 213 is fixedly connected to the end of the sleeve block 27 away from the spring one 23, a pressing plate 214 is fixedly connected to the top end of the side of the top inclined plate 212 close to the vertical plate 24, three guide blocks 215 are slidably connected to the vertical plate 24, a bearing plate 216 is fixedly connected to the end of each of the three Z-shaped rotating shafts 26 away from the sleeve block 27, two rotating rods 217 are fixedly connected to the end of each of the three bearing plates 216 away from the Z-shaped rotating shaft 26, six rotating rods 217 are provided in total, an arc-shaped clamping plate 218 is rotatably connected to each of the six rotating rods 217, an arc-shaped electromagnet 219 is fixedly connected to the same side of each of the six arc-shaped clamping plates 218 away from the bearing plate 216, a spring three 220 is fixedly connected between each of the six arc-shaped clamping plates 218 and the adjacent bearing plate 216, and an annular electromagnet 221 is fixedly connected to the cold upsetting pressing column output end of each of the pressure applying units 14.

[0041] Wherein: the turnover assembly is provided with two, only for the needs of the drawing display, the specific quantity is determined according to the actual cold upsetting machine demand.

[0042] Wherein: the number of guide grooves 25, Z-shaped rotating shafts 26, sleeve blocks 27, supporting plates 28 and the like is limited to the needs of the drawing display, and the specific number is determined according to the actual cold upsetting machine demand.

[0043] Wherein: the number of guide grooves 25 corresponds to the number of cold upsetting units 13 and pressure applying units 14.

[0044] Wherein: refer to Figure 10 As shown in the figure, the top of the guide groove 25 is provided with horizontal grooves on both sides, and the middle of the guide groove 25 is provided with a semicircular groove protruding downward.

[0045] Wherein: Z-shaped rotating shaft 26 is rotatably connected with the bottom end of adjacent guide block 215.

[0046] Wherein: Top inclined plate 212 is set as an inclined shape with the bottom expanding downward and the top being vertical.

[0047] Wherein: One side of bottom inclined plate 213 close to top inclined plate 212 is set as an inclined surface, and top inclined plate 212 and bottom inclined plate 213 are in extrusion fit.

[0048] Wherein: Pressing plate 214 extends to the top of vertical plate 24, and vertical plate 24 is in the downward moving path of pressing plate 214.

[0049] Wherein: Arc-shaped electromagnet 219 and annular electromagnet 221 are both started by external controller, specifically: when arc-shaped electromagnet 219 generates magnetism by being electrified, annular electromagnet 221 does not generate magnetism by being de-energized, and when annular electromagnet 221 generates magnetism by being electrified, arc-shaped electromagnet 219 is de-energized.

[0050] Wherein: Referring to Figure 4 The corresponding two cold heading units 13 and pressing units 14 are on the same horizontal line, that is, the cold heading units 13 and pressing units 14 on the same horizontal line are in the same cold heading processing position.

[0051] Wherein: The fully extended length of hydraulic rod 211 is equal to the distance between the upper and lower cold heading processing positions, specifically: when the telescopic end of hydraulic rod 211 is fully extended, it can be moved from the previous cold heading processing position to the next cold heading processing position.

[0052] In the initial state of the material turning assembly, that is, before the cold heading processing of workpiece 15, the internal structure state of the material turning assembly is as follows, that is, the state shown in the drawing:

[0053] Two springs 23 are not elastically compressed, cross plate 22 is at the top end of two guide rods 21, Z-shaped rotating shaft 26 is at one end close to pressing unit 14 inside guide groove 25, the telescopic end of hydraulic rod 211 is not extended, the inclined surface of top inclined plate 212 is in contact with the inclined surface of bottom inclined plate 213, arc-shaped electromagnet 219 is not electrified to generate magnetism, annular electromagnet 221 is electrified to generate magnetism, multiple annular electromagnets 221 magnetically attract the workpieces 15 corresponding to their respective positions, and spring 220 is not elastically stretched.

[0054] When the turnover assembly is running, i.e. the workpiece 15 needs to be cold heading, at this time the hydraulic rod 211 is powered on at the same time as the arc electromagnet 219, when the arc electromagnet 219 is powered on, the two arc electromagnets 219 on the same bearing plate 216 generate magnetism, the arc electromagnet 219 generating magnetism is adsorbed by the workpiece 15, so that the arc electromagnet 219 drives the arc-shaped clamping plate 218 to be deflected and rotated towards the workpiece 15, until the two arc-shaped clamping plates 218 completely clamp the workpiece 15 to the horizontal state, at this time with the rotation of the arc-shaped clamping plate 218, the spring three 220 is elastically stretched, and when the arc-shaped clamping plate 218 clamps the workpiece 15, the annular electromagnet 221 is powered off and no longer magnetically attracts the workpiece 15.

[0055] When the hydraulic rod 211 is powered on, the hydraulic rod 211 extends downward to drive the top inclined plate 212 and the pressing plate 214 to move downward synchronously, while the top inclined plate 212 moves downward, it guides the inclined downward thrust to the bottom inclined plate 213 through the inclined surface, and then the bottom inclined plate 213 drives the sleeve block 27 to have an inclined downward movement tendency, but the sleeve block 27 is limited in movement by the Z-shaped shaft 26 through the guide groove 25, and then the movement of the sleeve block 27 drives the Z-shaped shaft 26 to slide in the guide groove 25 to the side of the cold heading unit 13, while elastically stretching the spring two 29, with the sliding of the Z-shaped shaft 26, as described above for the guide groove 25, the guide groove 25 is divided into two horizontal grooves on the top of the guide groove 25, and a semicircular groove protruding downward in the middle, and then at this time the Z-shaped shaft 26 moves horizontally in the horizontal groove on the top of the guide groove 25 to the direction of the cold heading unit 13.

[0056] Further, the workpiece 15 clamped by the two arc-shaped clamping plates 218 is horizontally displaced a distance to the direction of the cold heading unit 13, under the drive of the Z-shaped shaft 26, the guide block 215 synchronously slides horizontally on the vertical plate 24, when the Z-shaped shaft 26 slides into the semicircular groove of the guide groove 25, at this time the end of the Z-shaped shaft 26 close to the sleeve block 27 slides along the semicircular groove of the guide groove 25, but the end of the Z-shaped shaft 26 connected with the bearing plate 216 still moves horizontally under the limitation of the guide block 215, when the Z-shaped shaft 26 slides in the guide groove 25 to the horizontal groove close to the side of the cold heading unit 13, at this time the Z-shaped shaft 26 rotates as a whole with the end of the Z-shaped shaft 26 connected with the bearing plate 216 as the rotation axis for half a circle, i.e. one hundred and eighty degrees turnover, and then the Z-shaped shaft 26 drives the bearing plate 216 to turn over one hundred and eighty degrees, i.e. the workpiece 15 turns over one hundred and eighty degrees, after the turnover is completed, the Z-shaped shaft 26 drives the bearing plate 216 to horizontally displace a distance to the cold heading unit 13 through the horizontal groove close to the side of the cold heading unit 13 of the guide groove 25.

[0057] And with the extension of the telescopic shaft of the hydraulic rod 211, when the top inclined plate 212 contacts the bottom inclined plate 213 and pushes the bottom inclined plate 213 to move horizontally for a distance, the bottom inclined plate 213 at this time interferes with the vertical section of the top inclined plate 212, because the hydraulic rod 211 drives the pressing plate 214 to move downward synchronously through the top inclined plate 212, and then when the bottom inclined plate 213 interferes with the vertical section of the top inclined plate 212, the pressing plate 214 gradually interferes with the top end of the vertical plate 24, and applies a vertical downward pushing force to the vertical plate 24, so that the vertical plate 24 drives the horizontal plate 22 to move downward, at this time the horizontal plate 22 slides downward on the two guide rods 21, and the two springs one 23 are elastically compressed.

[0058] With the downward movement of the vertical plate 24, the Z-shaped rotating shaft 26, the carrier plate 216, the arc-shaped clamping plate 218 and other structures arranged thereon are synchronously moved downward, that is, the vertical plate 24 drives the multiple clamped workpieces 15 to move downward synchronously, so that the multiple workpieces 15 that have been turned by one hundred and eighty degrees are moved downward and turned to the next cold heading processing position.

[0059] At this time, the pressure applying unit 14 is powered on, so that the cold heading pressing column of the pressure applying unit 14 moves to the cold heading unit 13 corresponding to the cold heading processing position, in the process of moving, the annular electromagnet 221 interferes with the workpiece 15, and the annular electromagnet 221 is powered on at this time, the annular electromagnet 221 generates magnetic attraction to the workpiece 15, and the workpiece 15 is magnetically attracted and fixed on the output end of the pressure applying unit 14, and at the same time that the annular electromagnet 221 is powered on, the hydraulic rod 211 and the arc-shaped electromagnet 219 are powered off at the same time, at this time, with the power-off of the arc-shaped electromagnet 219, the arc-shaped electromagnet 219 no longer generates magnetic attraction to the workpiece 15, under the elastic contraction of the spring three 220, the spring three 220 pulls the arc-shaped clamping plate 218 to reset, so that the arc-shaped electromagnet 219 no longer interferes with the workpiece 15, and then the workpiece 15 is no longer clamped by the arc-shaped clamping plate 218, specifically: the arc-shaped clamping plate 218, the arc-shaped electromagnet 219 and the like are no longer located on the movement path of the workpiece 15 cold heading.

[0060] With the power-off of the hydraulic rod 211, the telescopic end of the hydraulic rod 211 is retracted, and then the top inclined plate 212 is driven by the hydraulic rod 211 to move upward and reset, at this time, the top inclined plate 212 no longer applies a pushing force to the bottom inclined plate 213, and at the same time, the top inclined plate 212 drives the pressing plate 214 to move upward synchronously, and then under the elastic contraction of the spring 29, the spring 29 pulls the Z-shaped shaft 26 and the guide block 215 and other structures arranged thereon to reset to the initial state under the elastic contraction of the spring 29, specifically, the bearing plate 216, the arc-shaped clamping plate 218, the arc-shaped electromagnet 219 and other structures are reversely rotated by one hundred and eighty degrees, the Z-shaped shaft 26 is reset to one end close to the cold heading unit 13 inside the guide groove 25, and at the same time, the pressing plate 214 is reset upward, and then the pressing plate 214 no longer applies a downward pushing force to the vertical plate 24, and under the elastic extension of the spring 23, the spring 23 drives the horizontal plate 22 to move upward, so that the vertical plate 24 and the structures arranged thereon move upward and reset, and then at this time, the turnover assembly resets to the initial state, specifically, the related structures for turnover and downward movement reset to the last cold end processing position of the workpiece 15.

[0061] With the power-on of the pressing unit 14, the cold heading pressure column of the pressing unit 14 is magnetically attracted to the workpiece 15 through the annular electromagnet 221, and is synchronously moved to the cold heading unit 13 corresponding to the cold heading processing position and the workpiece 15, so that the end of the workpiece 15 not magnetically attracted abuts against the forming groove of the cold heading unit 13 and elastically compresses the ejector pin, at this time, the workpiece 15 is subjected to the pressure applied by the cold heading pressure column of the pressing unit 14, so that the workpiece 15 is cold headed and formed in the forming groove of the cold heading unit 13, after completion, the cold heading pressure column of the pressing unit 14 is retracted under the control of the controller, and the workpiece 15 is magnetically attracted by the annular electromagnet 221 and the ejector pin of the cold heading unit 13 is elastically reset, so that the workpiece 15 can smoothly come out of the forming groove of the cold heading unit 13, and the workpiece 15 is magnetically attracted by the annular electromagnet 221, so that the workpiece 15 resets together with the cold heading pressure column of the pressing unit 14, so that the workpiece 15 is removed from the cold heading unit 13.

[0062] In the operation process of the turnover assembly, through the operation of the turnover assembly, the workpiece 15 can be turned over and automatically transported to the next cold heading processing position without manual or additional complex operation to reposition and workpiece 15 material, saving the time consumed for recharging, enabling the cold heading machine to continuously and quickly process the workpiece 15 at both ends, greatly improving the production output per unit time.

[0063] Meanwhile, through the process of turning over and automatically carrying the workpiece 15 to the next cold heading processing position, the two arc-shaped clamping plates 218 clamp the workpiece 15 completely to the horizontal state, which can ensure the coaxial correspondence of the workpiece 15 after turning over with the cold heading pressure column and the cold heading groove, ensure the positioning accuracy of the workpiece 15 during the cold heading processing at both ends, thereby ensuring the size accuracy and relative position accuracy of the products at both ends, and improving the overall quality stability of the cold heading mold.

[0064] Meanwhile, through the magnetic attraction of the workpiece 15 by the annular electromagnet 221, the workpiece 15 can be smoothly separated from the forming groove of the cold heading unit 13, which can quickly separate the workpiece 15 after cold heading from the mold, reduce the demolding time, enable the cold heading machine to perform the next cold heading operation faster, and improve the working efficiency of the equipment.

[0065] It should be noted that in this document, the terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.

[0066] Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A cold heading die for the head recess of an injection molded part, comprising a cold heading operation base (11), a cold heading forming frame (12), a plurality of cold heading units (13), a plurality of pressure applying units (14), and a plurality of workpieces (15), wherein the cold heading forming frame (12) is installed on top of the cold heading operation base (11), the plurality of cold heading units (13) and the plurality of pressure applying units (14) are symmetrically installed on both sides of the cold heading forming frame (12) respectively, and the plurality of cold heading units (13) and the plurality of pressure applying units (14) are used for cold heading the workpieces (15), characterized in that: The cold upsetting operation base table (11) is provided with a plurality of material turning assemblies, the material turning assembly comprises two guide rods (21), the two guide rods (21) are fixedly connected to the top of the cold upsetting operation base table (11) in a symmetrical mode, a horizontal plate (22) is slidably connected to the two guide rods (21), a spring (23) is arranged on each of the two guide rods (21), a vertical plate (24) is fixedly connected to the top surface of the horizontal plate (22), three guide grooves (25) are linearly arranged on the vertical plate (24), a Z-shaped rotating shaft (26) is slidably arranged in each of the three guide grooves (25), and a sleeve block (27) is rotatably connected to the end, close to the horizontal plate (22), of each of the three Z-shaped rotating shafts (26); The vertical plate (24) is fixedly connected with three supporting plates (28) in a linear array mode, each of the three supporting plates (28) is fixedly connected with a spring (29) on the side, close to the sleeve block (27), of the supporting plate (28), a connecting rod (210) is fixedly connected to the three sleeve blocks (27), a hydraulic rod (211) is fixedly connected to the top end of the cold upsetting forming frame (12), the extension end of the hydraulic rod (211) faces downward, a top inclined plate (212) is fixedly connected to the extension end of the hydraulic rod (211), a bottom inclined plate (213) is fixedly connected to the end, away from the spring (23), of the sleeve block (27) located at the top, the top end of the top inclined plate (212) is fixedly connected with a pressing plate (214) on the side, close to the vertical plate (24), of the top inclined plate (212), three guide blocks (215) are slidably connected to the vertical plate (24), each of the three Z-shaped rotating shafts (26) is fixedly connected with a bearing plate (216) on the end, away from the sleeve block (27), of the Z-shaped rotating shaft (26), each of the three bearing plates (216) is fixedly connected with two rotating rods (217) on the end, away from the Z-shaped rotating shaft (26), of the bearing plate (216), the six rotating rods (217) are arranged in a symmetrical mode, each of the six rotating rods (217) is rotatably connected with an arc-shaped clamping plate (218), each of the six arc-shaped clamping plates (218) is fixedly connected with an arc-shaped electromagnet (219) on the same side, away from the bearing plate (216), of the arc-shaped clamping plate (218), each of the six arc-shaped clamping plates (218) and the adjacent bearing plate (216) is fixedly connected with a spring (220), and each of the cold upsetting pressing columns of the pressure applying unit (14) is fixedly connected with a ring-shaped electromagnet (221).

2. A cold heading die for the head recess of an injection molded part according to claim 1, characterized in that: The two ends of the spring (23) are fixedly connected with the bottom surface of the horizontal plate (22) and the top surface of the cold upsetting operation base table (11) respectively.

3. A cold heading die for the formation of a head recess in an injection moulded part according to claim 1 characterised in that: The number of the guide grooves (25) corresponds to the number of the cold upsetting units (13) and the pressure applying units (14).

4. A cold header die for the head recess of an injection molded part according to claim 1, characterized in that: The top part of the guide groove (25) is provided with horizontal grooves on both sides, and the middle part of the guide groove (25) is provided with a semicircular groove protruding downward.

5. A cold heading die for the formation of a head recess in an injection moulded part according to claim 1 characterised in that: The Z-shaped rotating shaft (26) is rotatably connected with the bottom end of the adjacent guide block (215).

6. A cold header die for the head recess of an injection molded part according to claim 1, characterized in that: The ends, away from the supporting plates (28), of the three springs (29) are fixedly connected with the sleeve blocks (27) on the same side respectively.

7. A cold heading die for the formation of a head recess in an injection moulded part according to claim 1 characterised in that: The top inclined plate (212) is provided in a shape that the bottom is inclined and the top is vertical.

8. A cold heading die for the formation of a head recess in an injection moulded part according to claim 1 characterised in that: The bottom inclined plate (213) is provided in a slope, and the slope of the bottom inclined plate (213) is complementarily arranged with the slope of the top inclined plate (212), and the top inclined plate (212) and the bottom inclined plate (213) are in a pressing fit.

9. A cold heading die for the formation of a head recess in an injection moulded part according to claim 1 characterised in that: The pressing plate (214) extends to the top of the vertical plate (24), and the vertical plate (24) is located in the downward moving path of the pressing plate (214), and the arc-shaped electromagnet (219) and the ring-shaped electromagnet (221) are started by an external controller.

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