A heat shaping device and method for metal injection molding

Abstract

The present application discloses a heat shaping device and method for metal injection molding, which belongs to the field of heat shaping technology and is used to efficiently and automatically complete the heat shaping of metal injection molded parts, and includes: a workbench, a heating channel, a claw assembly, and a thermoforming mold. The present invention can realize automatic heat shaping by designing an assembly line heat shaping device composed of a workbench, a heating channel, a claw assembly, and a thermoforming mold. Compared with the traditional method of manually placing an annular workpiece into a molding cavity, it does not require personnel to work for a long time, and the shaping process rhythm is more compact and the efficiency is higher.

Description

Technical Field

[0001] The present application relates to the field of thermal shaping technology, and in particular to a thermal shaping device and method for metal injection molding. Background Art

[0002] Sintering is a process in the metal injection molding process. Sintering eliminates the pores between powder particles, making the metal injection molded products fully dense or nearly fully dense. Since a large amount of binder is used in metal injection molding technology, the shrinkage during sintering is very large, and its linear shrinkage rate generally reaches 13%-25%. This leads to a problem of deformation control and dimensional accuracy control. At present, there is no way to completely and reliably control the size of the annular workpiece after sintering. Most of them use thermal shaping after sintering.

[0003] At present, most of the hot shaping devices use manual operation to place the annular workpiece into the molding cavity, which has low work efficiency. In addition, since the annular workpiece needs to be heated, the temperature around the mold is high, which is not suitable for personnel to work for a long time. Therefore, an automated hot shaping device and method for metal injection molding are urgently needed. Summary of the invention

[0004] The purpose of the present application is to provide an efficient and automated heat shaping device and method for metal injection molded parts.

[0005] In order to achieve the above objectives, the technical solution adopted in this application is:

[0006] A heat shaping device for metal injection molding, comprising:

[0007] A workbench, a heating channel is fixedly arranged above the workbench, and a first gap is formed between the bottom of the heating channel and the workbench;

[0008] A claw assembly, wherein the claw assembly is arranged on the side of the workbench, and the claw assembly acts at the first gap to pull the annular workpiece in the heating channel on the workbench to a first position on the workbench;

[0009] a thermoforming die, wherein the thermoforming die performs thermoforming on the annular workpiece at a first position on the workbench;

[0010] The workbench is provided with a first circular hole at a first position, and the inner diameter of the first circular hole is between the inner diameter and the outer diameter of the bottom end of the annular workpiece;

[0011] Thermoforming molds include:

[0012] The steel plate outer bracket, the workbench passes through the inner side of the steel plate outer bracket, and the top of the steel plate outer bracket and located above the workbench is fixedly connected with a mold mounting frame;

[0013] A hydraulic telescopic member, wherein the hydraulic telescopic member is fixed on the inner side of the steel plate outer bracket, and a punch is fixedly installed on the telescopic head of the hydraulic telescopic member, wherein the punch has a conical portion and a straight portion from top to bottom, and a limiting portion is fixedly installed on the outer side of the straight portion;

[0014] A shape shaping extrusion die is arranged inside the die mounting frame; when working, the hydraulic telescopic part drives the punch to pass through the first circular hole upward, and pushes the annular workpiece upward into the inner side of the shape shaping extrusion die, and the punch continues to push upward, driving the shape shaping extrusion die to extrude and contract, and at the same time, the straight part of the punch shapes the inner ring of the annular workpiece.

[0015] As a preferred embodiment, the claw assembly comprises:

[0016] A sliding shaft, wherein a sliding hole is provided on the upper surface of the workbench, the sliding shaft is slidably mounted inside the sliding hole, and the sliding shaft rotates;

[0017] A pulling claw, wherein the middle portion of the pulling claw is fixedly mounted on the top of the sliding shaft, a first end of the pulling claw is fixedly provided with a first transverse portion, and a second end of the pulling claw is fixedly provided with a second transverse portion;

[0018] A swinging member, wherein the first end of the swinging member is fixedly connected to the bottom end of the sliding shaft member, and the sliding shaft member, the swinging member, and the pulling claw are symmetrically arranged in two groups along the center line of the workbench, and an elastic pull rod is connected between the two groups of the swinging members, and the elastic pull rod acts on the swinging member, the sliding shaft member, and the pulling claw to rotate the first end of the pulling claw toward the outside;

[0019] A second telescopic member, the telescopic end of the second telescopic member is fixedly connected with a sliding block, the top of the sliding block is fixedly connected with a transmission plate through a connecting nail, the sliding block is slidably installed on the inner side of the sliding hole, the bottom of the transmission plate is fixedly connected with a first transmission member and a second transmission member, the first transmission member and the second transmission member are spaced apart, and the second cross portion is located between the first transmission member and the second transmission member.

[0020] As a preferred embodiment, the elastic pull rod comprises:

[0021] A first rod body, a first connecting shaft being fixedly connected to a side surface of a first end of the first rod body;

[0022] A second rod body, a second connecting shaft being fixedly connected to a side surface of a first end of the second rod body;

[0023] A tension spring, two ends of which are fixedly connected to the second end of the first rod body and the second end of the second rod body respectively;

[0024] The first connecting shaft and the second connecting shaft are rotatably connected to the two sets of swing members respectively.

[0025] As a preferred embodiment, the sliding shaft comprises, from bottom to top, a first threaded section, a first hexagonal section, a cylindrical section, a second hexagonal section, and a second threaded section, and a limiting ring is fixedly connected to the side surface of the cylindrical section;

[0026] The cylindrical section is located inside the sliding hole.

[0027] As a preferred embodiment, one end of the heating channel away from the thermoforming mold is fixedly connected to a guide plate, and the guide plate is fixedly connected to the workbench;

[0028] It also includes: a first conveying line, wherein a discharging end of the first conveying line corresponds to a guide plate on the workbench.

[0029] As a preferred embodiment, a second circular hole is provided on the upper surface of the workbench and is located behind the first circular hole, and the inner diameter of the second circular hole is larger than the outer diameter of the annular workpiece;

[0030] It also includes: a second conveying line, which is located below the second circular hole.

[0031] As a preferred embodiment, a first layer channel and a second layer channel are provided on the side of the mold mounting frame, a transmission hole is provided between the first layer channel and the second layer channel, and a vertically penetrating central through hole is provided at the center of the mold mounting frame;

[0032] The profile shaping extrusion die comprises:

[0033] An extrusion die, wherein the extrusion die is slidably arranged inside the first layer channel;

[0034] A transmission block, wherein the transmission block is slidably arranged inside the transmission hole, and a set of wedge-shaped transmission surfaces are formed between the transmission block and the extrusion die;

[0035] A transmission beam plate, the transmission beam plate is located in the second layer channel, and the transmission beam plate is fixedly connected to the top of the transmission block, and the top of the transmission beam plate is fixedly connected with a guide column;

[0036] The extrusion die is provided with two groups of T-shaped reset members, the T-shaped reset members are fixedly mounted on the side of the die mounting frame, and the transverse portion of the T-shaped reset member is located between the two groups of extrusion dies, and the transverse portion of the T-shaped reset member is an elastic member.

[0037] Preferably, an electromagnetic induction component is fixedly disposed on the inner side of the heating channel.

[0038] As a preference, a steel plate inner bracket is fixedly connected to the inner side of the steel plate outer bracket, and the steel plate inner bracket is fixedly connected to the side surface of the hydraulic telescopic component.

[0039] A method for using a heat shaping device for metal injection molding, using the heat shaping device for metal injection molding, comprising the following steps:

[0040] S1, the heating channel heats the annular workpiece sliding into the interior thereof, and heats the annular workpiece to a temperature of 300-600°C;

[0041] S2, the claw assembly pulls the heating channel after heating to the first position and resets it;

[0042] S3, the hot forming die performs hot shaping on the annular workpiece at the first position on the workbench; S3 is specifically as follows: the hydraulic telescopic part drives the punch to push up, and after the punch passes through the first circular hole, the annular workpiece is sleeved on the tapered portion of the punch, and as the punch is pushed upward, the annular workpiece is sent into the inner side of the shape shaping extrusion die. Restricted by the shape shaping extrusion die, the annular workpiece cannot continue to move upward, and the punch continues to push upward, driving the shape shaping extrusion die to extrude the outer side of the annular workpiece, and the inner ring of the annular workpiece is shaped by the straight portion of the punch.

[0043] Compared with the prior art, the beneficial effects of this application are:

[0044] (1) The present invention can realize automated hot shaping by designing an assembly line hot shaping device composed of a workbench, a heating channel, a claw assembly and a hot forming mold. Compared with the traditional method of manually placing the annular workpiece into the forming cavity, it does not require personnel to work for a long time, and the shaping process rhythm is more compact and the efficiency is higher. Specifically, the punch is driven by a hydraulic telescopic member to pass through the first circular hole upward, and push the annular workpiece upward to enter the inner side of the shape shaping extrusion mold, and the punch continues to push upward to drive the shape shaping extrusion mold to extrude and shrink, and at the same time, the straight part of the punch shapes the inner ring of the annular workpiece. This method only requires a single hydraulic telescopic member to complete: sending the annular workpiece at the first position into the shape shaping extrusion mold, the extrusion action of the shape shaping extrusion mold, and the shaping of the inner ring of the annular workpiece. It has the advantages of compact structure and efficient driving.

[0045] (2) The present invention, through the design of the claw assembly, adopts the method of pulling backward and pushing forward to drive the sliding shaft and the claw, and an elastic pull rod is arranged between the sliding shaft and the claw, and the elastic pull rod acts on the swinging member, the sliding shaft and the claw to make the first end of the claw rotate outward, that is, under the action of the elastic pull rod, the first transverse portion of the first end of the claw faces outward, and when pulling backward, the sliding shaft, the claw and the swinging member are driven to rotate inward to clamp the annular workpiece; when pushing forward, under the action of the elastic pull rod, the sliding shaft and the claw automatically open and reset, so that the annular workpiece can be efficiently pulled to the first position. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a three-dimensional diagram of the heat shaping device used for metal injection molding.

[0047] Figure 2 It is a front view of the heat shaping device for metal injection molding.

[0048] Figure 3 It is a side view of the heat shaping device for metal injection molding.

[0049] Figure 4 It is a top view of the heat shaping device for metal injection molding.

[0050] Figure 5 for Figure 2 Section view of the section line at AA in the middle.

[0051] Figure 6 for Figure 5 A partial enlarged view of point B in the middle.

[0052] Figure 7 It is a schematic diagram of the connection between the hydraulic telescopic part and the inner support head of the thermal shaping device for metal injection molding.

[0053] Figure 8 The figure is a schematic diagram of the relative positions of the internal components of the molding structure of the heat shaping device for metal injection molding.

[0054] Fig. 9 It is a three-dimensional schematic diagram of the workbench of the heat shaping device for metal injection molding.

[0055] Fig.10 for Fig. 9 A partial enlarged view of point C in the middle.

[0056] Fig.11 It is a three-dimensional schematic diagram of the claw assembly of the heat shaping device for metal injection molding.

[0057] Fig.12 This is an exploded view of the double claw parts of the claw assembly of the heat shaping device for metal injection molding.

[0058] Fig.13 This is a schematic diagram of the interior of the heating channel of the heat shaping device for metal injection molding.

[0059] In the figure: 1, first conveyor line; 2, workbench; 3, heating channel; 3a, electromagnetic induction component; 4, guide plate; 5, first gap; 6, support platform; 7, first circular hole; 8, second circular hole; 9, annular workpiece; 9a, ring; 9b, step; 10, claw assembly; 10a, sliding hole; 10b, sliding shaft; 10b1, first threaded section; 10b2, first hexagonal section; 10b3, cylindrical section; 10b4, limiting ring; 10b5, second hexagonal section; 10b6, second threaded section; 10c, claw; 10c1, first transverse section; 10c2, second transverse section; 10d, sliding block; 10e, connecting nail; 10f, transmission plate; 10g, first transmission member; 10h, elastic pull rod; 10h1, first Rod body; 10h2, first connecting shaft; 10h3, tension spring; 10h4, second rod body; 10h5, second connecting shaft; 10i, second transmission member; 10j, swing member; 10k, second telescopic member; 11, thermoforming mold; 11a, steel plate outer bracket; 11b, mold mounting frame; 11c, steel plate inner bracket; 11d, hydraulic telescopic member; 11e, telescopic head; 11f, punch; 11f1, cone; 11f2, straight part; 11f3, limiting part; 11g, first layer channel; 11h, second layer channel; 11i, transmission hole; 11j, extrusion mold; 11k, transmission block; 11l, transmission beam plate; 11m, center through hole; 11n, guide column; 11o, T-shaped reset member; 12, second conveyor line. DETAILED DESCRIPTION

[0060] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0061] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present application.

[0062] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0063] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0064] Embodiment 1

[0065] like Figure 1-Figure 13 The heat shaping device for metal injection molding shown includes: a workbench 2, a heating channel 3, a claw assembly 10 and a heat forming mold 11.

[0066] The workbench 2 is a long structure, and the heating channel 3 is fixedly installed above the workbench 2. The channel direction of the heating channel 3 is consistent with the length direction of the workbench 2. The heating channel 3 heats the annular workpiece 9 located inside it. A first gap 5 is formed between the bottom of the heating channel 3 and the workbench 2, so that the claw assembly 10 can push the annular workpiece 9 after heating from the first gap 5. The claw assembly 10 is arranged on the side of the workbench 2. The claw assembly 10 acts at the first gap 5 to pull the annular workpiece 9 in the heating channel 3 on the workbench 2 to the first position on the workbench 2, and the thermoforming mold 11 performs thermoforming on the annular workpiece 9 at the first position on the workbench 2.

[0067] The workbench 2 is provided with a first circular hole 7 at the first position, and the inner diameter of the first circular hole 7 is between the inner diameter and the outer diameter of the bottom end of the annular workpiece 9, so that the annular workpiece 9 will not fall from the first circular hole 7. The claw assembly 10 pulls the annular workpiece 9 after heating to the first position, that is, the center of the annular workpiece 9 basically coincides with the center of the first circular hole 7.

[0068] Specifically, the hot forming mold 11 includes: a steel plate outer bracket 11a, a hydraulic telescopic member 11d, a mold mounting frame 11b and an appearance shaping extrusion mold.

[0069] The workbench 2 passes through the inner side of the steel plate outer bracket 11a, and can be fixedly connected to the steel plate outer bracket 11a. A support platform 6 is set at one end of the workbench 2. The workbench 2 is stabilized by the joint action of the steel plate outer bracket 11a and the support platform 6. A mold mounting frame 11b is fixedly connected to the top of the steel plate outer bracket 11a and above the workbench 2, and an appearance shaping extrusion mold is installed in the mold mounting frame 11b.

[0070] The hydraulic telescopic member 11d is fixed on the inner side of the steel plate outer bracket 11a, and a punch 11f is fixedly installed on the telescopic head 11e of the hydraulic telescopic member 11d. The punch 11f is composed of a conical portion 11f1 and a straight portion 11f2 (cylindrical) from top to bottom, and a limiting portion 11f3 is fixedly installed on the outer side of the straight portion 11f2.

[0071] The annular workpiece 9 includes a ring 9a, and a step 9b is arranged on the top of the ring 9a. The inner side of the heating channel 3 is aligned with the step 9b, which can ensure that the annular workpiece 9 slides smoothly along the inner side of the heating channel 3.

[0072] During operation, the hydraulic telescopic part 11d drives the punch 11f upward through the first circular hole 7, and pushes the annular workpiece 9 upward into the inner side of the outer shape shaping extrusion die. The punch 11f continues to push upward, driving the outer shape shaping extrusion die to extrude and contract, and at the same time, the straight part 11f2 of the punch 11f shapes the inner circle of the annular workpiece 9.

[0073] Specifically, the hydraulic telescopic member 11d drives the punch 11f to push upward. After the punch 11f passes through the first circular hole 7, the annular workpiece 9 is sleeved on the tapered portion 11f1 on the punch 11f, and as the punch 11f is pushed upward, the annular workpiece 9 is sent into the inner side of the external shaping extrusion die. Restricted by the external shaping extrusion die, the annular workpiece 9 cannot continue to move upward. The punch 11f continues to push upward, driving the external shaping extrusion die to extrude the outer side of the annular workpiece 9, and the inner ring of the annular workpiece 9 is shaped by the straight portion 11f2 of the punch 11f. After the internal and external shaping of the annular workpiece 9 is completed, the hydraulic telescopic member 11d drives the punch 11f to fall back, and the external shaping extrusion die is reset, and the annular workpiece 9 is still sleeved on the tapered portion 11f1 of the punch 11f. As the punch 11f moves down below the position of the first circular hole 7, the annular workpiece 9 falls on the workbench 2, and the next annular workpiece 9 pulled over pushes the previous annular workpiece 9 to the other side, thereby realizing fully automated hot shaping.

[0074] In one embodiment, the claw assembly 10 includes a sliding shaft 10b, a claw 10c, a swinging member 10j and a second telescopic member 10k.

[0075] The upper surface of the workbench 2 is provided with a sliding hole 10a, and the sliding shaft 10b is slidably installed inside the sliding hole 10a, and the sliding shaft 10b rotates. Generally, the matching part of the sliding shaft 10b and the sliding hole 10a is designed to be circular, and the middle part of the pull claw 10c is fixedly installed with the top of the sliding shaft 10b, and the pull claw 10c rotates and slides synchronously with the sliding shaft 10b. The first end of the pull claw 10c is fixedly provided with a first transverse portion 10c1, and the second end of the pull claw 10c is fixedly provided with a A second transverse portion 10c2 is provided, the first transverse portion 10c1 is a portion for pulling the annular workpiece 9, the second transverse portion 10c2 is a transmission portion, the first end of the swing member 10j is fixedly connected to the bottom end of the sliding shaft member 10b, the swing member 10j rotates and slides synchronously with the sliding shaft member 10b, the sliding shaft member 10b, the swing member 10j, and the pull claw 10c are symmetrically arranged in two groups along the center line of the workbench 2, and an elastic pull rod 10h is connected between the two groups of swing members 10j, and the elastic pull rod 10h acts on the swinging member 10j, the sliding shaft member 10b, and the pulling claw 10c, so that the first end of the pulling claw 10c rotates toward the outside, that is, under the action of the elastic pull rod 10h, the first transverse portion 10c1 of the first end of the pulling claw 10c faces outward (at this time, the first transverse portion 10c1 does not interfere with the annular workpiece 9), and the telescopic end of the second telescopic member 10k is fixedly connected with the sliding block 10d, and the top of the sliding block 10d is fixedly connected with the transmission plate 10f through the connecting nail 10e. The connecting nail 10e is generally provided in two groups, and the connecting nail 10e is a rivet. The sliding block 10d is located on the inner side of the sliding hole 10a and is slidably installed. The bottom of the transmission plate 10f is fixedly connected with the first transmission member 10g and the second transmission member 10i. The first transmission member 10g and the second transmission member 10i are arranged at intervals, and the second transverse portion 10c2 is located between the first transmission member 10g and the second transmission member 10i. The first transmission member 10g is generally designed to be circular, and the second transmission member 10i is designed to be flat.

[0076] like Fig. 9 As shown in , at this time, under the action of the elastic pull rod 10h, the first transverse portion 10c1 of the first end of the pulling claw 10c faces outward, and the second telescopic member 10k pulls the sliding block 10d to slide, and the sliding block 10d drives the transmission plate 10f to move together, and the first transmission member 10g acts on the inner side of the second transverse portion 10c2. This force drives the pulling claw 10c as a whole to overcome the elastic force of the elastic pull rod 10h and rotate. When the pulling claw 10c rotates to be parallel to the direction of the sliding hole 10a as a whole, that is, when the first transverse portion 10c1 is stuck on the outside of the annular workpiece 9, the force drives the pulling claw 10c as a whole to slide along the direction of the sliding hole 10a, thereby pulling the annular workpiece 9.

[0077] After completing the step of pulling the annular workpiece 9 to the first position, the second telescopic member 10k pushes the sliding block 10d, and then pushes the transmission plate 10f, and the first transmission member 10g loses its force on the second transverse portion 10c2. Under the elastic force of the elastic pull rod 10h, the claw 10c is reset (restored to the state where the first transverse portion 10c1 of the first end of the claw 10c is facing outward), and then the second transmission member 10i acts on the outside of the second transverse portion 10c2, pushing the claw 10c to slide and reset as a whole.

[0078] In one embodiment, the elastic pull rod 10h includes: a first rod body 10h1, a second rod body 10h4 and a tension spring 10h3.

[0079] A first connecting shaft 10h2 is fixedly connected to the side surface of the first end of the first rod body 10h1, a second connecting shaft 10h5 is fixedly connected to the side surface of the first end of the second rod body 10h4, two ends of the tension spring 10h3 are respectively fixedly connected to the second end of the first rod body 10h1 and the second end of the second rod body 10h4, and the first connecting shaft 10h2 and the second connecting shaft 10h5 are respectively rotatably connected to the two groups of swinging parts 10j.

[0080] The tension applied by the tension spring 10h3 is transmitted to the first rod body 10h1 and the second rod body 10h4, so that the first rod body 10h1 and the second rod body 10h4 have an elastic contraction effect after installation.

[0081] In one embodiment, the sliding shaft 10b includes, from bottom to top, a first threaded section 10b1, a first hexagonal section 10b2, a cylindrical section 10b3, a second hexagonal section 10b5, and a second threaded section 10b6, and a limiting ring 10b4 is fixedly connected to the side of the cylindrical section 10b3;

[0082] The cylindrical section 10b3 is located inside the slide hole 10a.

[0083] A first hexagonal hole is formed on the pulling claw 10c, and the first hexagonal hole is sleeved on the second hexagonal section 10b5, and then a first nut is threadedly installed on the second threaded section 10b6.

[0084] A second hexagonal hole is provided on the swinging member 10j, and the second hexagonal hole is sleeved on the first hexagonal section 10b2, and then a second nut is threadedly installed on the first threaded section 10b1.

[0085] In one embodiment, a guide plate 4 is fixedly connected to one end of the heating channel 3 away from the thermoforming mold 11 . The guide plate 4 is fixedly connected to the workbench 2 . The guide plate 4 serves to guide the annular workpiece 9 into the interior of the heating channel 3 .

[0086] It also includes: a first conveyor line 1, the discharge end of the first conveyor line 1 corresponds to the guide plate 4 on the workbench 2, the first conveyor line 1 conveys the annular workpiece 9 to the workbench 2, and as the subsequent annular workpiece 9 pushes forward, the annular workpiece 9 slides on the workbench 2 into the heating channel 3.

[0087] In one embodiment, a second circular hole 8 is provided on the upper surface of the workbench 2 and behind the first circular hole 7 . The inner diameter of the second circular hole 8 is larger than the outer diameter of the annular workpiece 9 , so that the annular workpiece 9 can fall from the second circular hole 8 .

[0088] It also includes: a second conveyor line 12, which is located below the second circular hole 8 and is pushed forward by the annular workpiece 9 at the rear, so that the annular workpiece 9 at the front slides along the workbench 2 to the second circular hole 8 and falls from the second circular hole 8 to the second conveyor line 12.

[0089] The second conveyor line 12 adopts a high temperature resistant steel chain conveying structure.

[0090] In one embodiment, a first channel 11g and a second channel 11h are provided on the side of the mold mounting frame 11b, a transmission hole 11i is provided between the first channel 11g and the second channel 11h, and a vertical central through hole 11m is provided in the center of the mold mounting frame 11b.

[0091] The profile shaping extrusion die comprises: an extrusion die 11j, a transmission block 11k, a transmission beam plate 11l and a T-shaped reset member 11o.

[0092] The extrusion die 11j is slidably arranged on the inner side of the first layer channel 11g, the transmission block 11k is slidably arranged on the inner side of the transmission hole 11i, and a group of wedge-shaped transmission surfaces are formed between the transmission block 11k and the extrusion die 11j, that is, the contact part between the transmission block 11k and the extrusion die 11j is an inclined surface, and when the transmission block 11k moves upward, the extrusion die 11j is pushed to slide inward, the transmission beam plate 11l is located in the second layer channel 11h, and the transmission beam plate 11l is fixedly connected to the top of the transmission block 11k, and the top of the transmission beam plate 11l is fixedly connected with a guide column 11n, and two groups of extrusion dies 11j are arranged, and the T-shaped reset member 11o is fixedly installed on the side of the die mounting frame 11b, and the cross part of the T-shaped reset member 11o is located between the two groups of extrusion dies 11j, and the cross part of the T-shaped reset member 11o is an elastic member.

[0093] The T-shaped reset member 11o is used to reset the two groups of extrusion dies 11j.

[0094] The hydraulic telescopic part 11d drives the punch 11f upward through the first circular hole 7, and pushes the annular workpiece 9 upward into the inner side of the external shaping extrusion die. The punch 11f continues to push upward, and the punch 11f presses on the transmission beam plate 11l, pushing the transmission beam plate 11l to move upward, and then pushing the transmission block 11k to move upward. The wedge-shaped transmission surface between the transmission block 11k and the extrusion die 11j interacts with each other, causing the extrusion die 11j to slide inward, and the two groups of extrusion dies 11j slide inward to extrude and shape the inner annular workpiece 9.

[0095] In one embodiment, an electromagnetic induction component 3 a is fixedly disposed on the inner side of the heating channel 3 , and the electromagnetic induction component 3 a is used to heat the annular workpiece 9 in the heating channel 3 .

[0096] In one embodiment, the inner side of the steel plate outer bracket 11a is fixedly connected to the inner side of the steel plate inner bracket 11c, and the steel plate inner bracket 11c is fixedly connected to the side of the hydraulic telescopic member 11d.

[0097] Embodiment 2

[0098] A method for using a heat shaping device for metal injection molding, using the heat shaping device for metal injection molding in embodiment 1, comprising the following steps:

[0099] S1, the heating channel 3 heats the annular workpiece 9 sliding into the interior thereof, and heats the annular workpiece 9 to a temperature of 300-600° C.;

[0100] S2, the claw assembly 10 pulls the heating channel 3 after heating to the first position and resets it;

[0101] S3, the hot forming mold 11 performs hot shaping on the annular workpiece 9 at the first position on the workbench 2; S3 is specifically as follows: the hydraulic telescopic member 11d drives the punch 11f to push upward, and after the punch 11f passes through the first circular hole 7, the annular workpiece 9 is sleeved on the tapered portion 11f1 on the punch 11f, and as the punch 11f is pushed upward, the annular workpiece 9 is sent into the inner side of the shape shaping extrusion mold. Restricted by the shape shaping extrusion mold, the annular workpiece 9 cannot continue to move upward, and the punch 11f continues to push upward, driving the shape shaping extrusion mold to extrude the outer side of the annular workpiece 9, and the inner ring of the annular workpiece 9 is shaped by the straight portion 11f2 of the punch 11f.

[0102] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A heat shaping device for metal injection molding, characterized in that: include: A workbench, a heating channel is fixedly arranged above the workbench, and a first gap is formed between the bottom of the heating channel and the workbench; A claw assembly, wherein the claw assembly is arranged on the side of the workbench, and the claw assembly acts at the first gap to pull the annular workpiece in the heating channel on the workbench to a first position on the workbench; a thermoforming die, wherein the thermoforming die performs thermoforming on the annular workpiece at a first position on the workbench; The workbench is provided with a first circular hole at a first position, and the inner diameter of the first circular hole is between the inner diameter and the outer diameter of the bottom end of the annular workpiece; Thermoforming molds include: The steel plate outer bracket, the workbench passes through the inner side of the steel plate outer bracket, and the top of the steel plate outer bracket and located above the workbench is fixedly connected with a mold mounting frame; A hydraulic telescopic member, wherein the hydraulic telescopic member is fixed on the inner side of the steel plate outer bracket, and a punch is fixedly installed on the telescopic head of the hydraulic telescopic member, wherein the punch has a conical portion and a straight portion from top to bottom, and a limiting portion is fixedly installed on the outer side of the straight portion; An external shaping extrusion die is arranged inside the die mounting frame; The side of the mold mounting frame is provided with a first layer channel and a second layer channel, a transmission hole is provided between the first layer channel and the second layer channel, and the center of the mold mounting frame is provided with a vertically penetrating central through hole; The profile shaping extrusion die comprises: An extrusion die, wherein the extrusion die is slidably arranged inside the first layer channel; A transmission block, wherein the transmission block is slidably arranged inside the transmission hole, and a set of wedge-shaped transmission surfaces are formed between the transmission block and the extrusion die; A transmission beam plate, the transmission beam plate is located in the second layer channel, and the transmission beam plate is fixedly connected to the top of the transmission block, and the top of the transmission beam plate is fixedly connected with a guide column; T-shaped reset member, the extrusion die is provided with two groups, the T-shaped reset member is fixedly mounted on the side of the die mounting frame, and the transverse portion of the T-shaped reset member is located between the two groups of extrusion dies, and the transverse portion of the T-shaped reset member is an elastic member; When working, the hydraulic telescopic part drives the punch to pass through the first circular hole upward, and pushes the annular workpiece upward to enter the inner side of the external shaping extrusion die, and the punch continues to push upward to drive the external shaping extrusion die to extrude and contract, and at the same time, the straight part of the punch shapes the inner ring of the annular workpiece; The claw assembly comprises: A sliding shaft, wherein a sliding hole is provided on the upper surface of the workbench, the sliding shaft is slidably mounted inside the sliding hole, and the sliding shaft rotates; A pulling claw, wherein the middle portion of the pulling claw is fixedly mounted on the top of the sliding shaft, a first end of the pulling claw is fixedly provided with a first transverse portion, and a second end of the pulling claw is fixedly provided with a second transverse portion; A swinging member, wherein the first end of the swinging member is fixedly connected to the bottom end of the sliding shaft member, and the sliding shaft member, the swinging member, and the pulling claw are symmetrically arranged in two groups along the center line of the workbench, and an elastic pull rod is connected between the two groups of the swinging members, and the elastic pull rod acts on the swinging member, the sliding shaft member, and the pulling claw to rotate the first end of the pulling claw toward the outside; A second telescopic member, wherein the telescopic end of the second telescopic member is fixedly connected to a sliding block, the top of the sliding block is fixedly connected to a transmission plate via a connecting nail, the sliding block is slidably installed inside the sliding hole, the bottom of the transmission plate is fixedly connected to a first transmission member and a second transmission member, the first transmission member and the second transmission member are spaced apart, and the second transverse portion is located between the first transmission member and the second transmission member; The elastic pull rod comprises: A first rod body, a first connecting shaft being fixedly connected to a side surface of a first end of the first rod body; A second rod body, a second connecting shaft being fixedly connected to a side surface of a first end of the second rod body; A tension spring, two ends of which are fixedly connected to the second end of the first rod body and the second end of the second rod body respectively; The first connecting shaft and the second connecting shaft are rotatably connected to the two sets of swing members respectively; The sliding shaft member includes, from bottom to top, a first threaded section, a first hexagonal section, a cylindrical section, a second hexagonal section, and a second threaded section, and a limiting ring is fixedly connected to the side surface of the cylindrical section; The cylindrical section is located inside the sliding hole.

2. The heat shaping device for metal injection molding according to claim 1, characterized in that: A guide plate is fixedly connected to one end of the heating channel away from the thermoforming mold, and the guide plate is fixedly connected to the workbench; It also includes: a first conveying line, wherein a discharging end of the first conveying line corresponds to a guide plate on the workbench.

3. The heat shaping device for metal injection molding according to claim 1, characterized in that: A second circular hole is provided on the upper surface of the workbench and is located behind the first circular hole, and the inner diameter of the second circular hole is larger than the outer diameter of the annular workpiece; It also includes: a second conveying line, which is located below the second circular hole.

4. The heat shaping device for metal injection molding according to claim 1, characterized in that: An electromagnetic induction component is fixedly arranged on the inner side of the heating channel.

5. The heat shaping device for metal injection molding according to claim 1, characterized in that: The inner side of the steel plate outer bracket is fixedly connected with a steel plate inner bracket, and the steel plate inner bracket is fixedly connected to the side surface of the hydraulic telescopic component.

6. A method for using a heat shaping device for metal injection molding, characterized in that: Using the heat shaping device for metal injection molding according to any one of claims 1 to 5 comprises the following steps: S1, the heating channel heats the annular workpiece sliding into the interior thereof, and heats the annular workpiece to a temperature of 300-600°C; S2, the claw assembly pulls the heating channel after heating to the first position and resets it; S3, the hot forming die performs hot shaping on the annular workpiece at the first position on the workbench; S3 is specifically as follows: the hydraulic telescopic part drives the punch to push up, and after the punch passes through the first circular hole, the annular workpiece is sleeved on the tapered portion of the punch, and as the punch is pushed upward, the annular workpiece is sent into the inner side of the shape shaping extrusion die. Restricted by the shape shaping extrusion die, the annular workpiece cannot continue to move upward, and the punch continues to push upward, driving the shape shaping extrusion die to extrude the outer side of the annular workpiece, and the inner ring of the annular workpiece is shaped by the straight portion of the punch.

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