A hot forging die for the magnetic pole of an automotive generator

Abstract

The present invention relates to the technical field of automotive part processing, and particularly to a hot forging die for automotive generator magnetic poles, which includes a lower die, an upper die, a piston block, and a pressure regulating component. The upper die and the lower die can be closed. The lower die is provided with a first groove and a second groove, and the raw material forms a workpiece in the first groove and the second groove. The workpiece includes a disc and a jaw. The piston block is slidably arranged in the second groove in the vertical direction, and the piston block can block the second groove. The piston block is located below the jaw and can contact the jaw. The pressure regulating component is communicated with the second groove and is used to control the pressure in the second groove. By setting the pressure regulating component, after the raw material enters the first groove, the pressure regulating component controls the first groove and the second groove to be in a negative pressure environment, which improves the flow rate and increases the flow distance of the raw material. The piston block can accurately control the extension distance of the raw material in the second groove, control the length of the jaw, and improve the forming quality of the workpiece.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive component processing, and particularly to a hot forging die for the magnetic pole of an automotive generator. Background Art

[0002] Most of the magnetic poles of automotive generators are in the shape of claws, also known as claw poles. At present, the manufacturing processes for claw poles of automotive generators at home and abroad include hot, warm, and cold die forging, generally requiring 5 9 separate forming processes, such as blanking, heating, upsetting, pre-forging, final forging, trimming, etc. Some intermediate treatments, such as annealing, phase transformation treatment, and finishing, need to be added between these processes. Each process requires a separate forming device. Therefore, the claw pole manufacturing has long suffered from problems such as complex processes, long production cycles, and low material utilization rates.

[0003] With the increasing competition in the manufacturing industry, products with high efficiency, precision, low consumption, and high quality have become the mainstream pursuit for the manufacturing industry to improve product competitiveness. Summary of the Invention

[0004] Based on this, in view of the complex hot forging process of the current claw pole, it is necessary to provide a hot forging die for the magnetic pole of an automotive generator.

[0005] The above object is achieved by the following technical solutions:

[0006] A hot forging die for the magnetic pole of an automotive generator includes a base, a lower die, an upper die, an assisting forging mechanism, a driving mechanism, and a pressure regulating mechanism. The base is fixedly arranged, the lower die is fixedly arranged above the base, the upper die is slidably arranged above the lower die in the vertical direction, the upper die and the lower die can be closed. The lower die is provided with a first groove and a second groove. The first groove is opened on the upper surface of the lower die. There are multiple second grooves, and the multiple second grooves are evenly distributed around the circumferential surface of the first groove. The first groove communicates with the multiple second grooves on the upper surface of the lower die. The second groove penetrates through the upper and lower surfaces of the lower die. The upper die is provided with a third groove. When the upper die and the lower die are closed, the first groove and the second groove both communicate with the third groove. The raw material forms a workpiece in the first groove, the second groove, and the third groove. The workpiece includes a disc and clamping claws. The disc is located in the first groove and the third groove, and the clamping claws are located in the second groove.

[0007] The number of assisting forging mechanisms is the same as that of the second grooves. Each assisting forging mechanism includes a connecting rod and two piston blocks. The two piston blocks are slidably arranged in a second groove in the vertical direction, and the two piston blocks can partition the second groove. Each piston block is located below the jaw and can contact the jaw. The connecting rod is slidably arranged below the piston block in the vertical direction, and the connecting rod and the piston block are slidably connected in the horizontal direction. A pressure regulating assembly is arranged on the base, and the pressure regulating assembly communicates with the second groove for controlling the pressure in the second groove; a driving mechanism is arranged on the base, and the driving mechanism is used for controlling the connecting rod to slide in the vertical direction.

[0008] Preferably, the first groove is cylindrical. Each second groove has four side surfaces, and the four side surfaces are pairwise opposite. Among them, two opposite side surfaces are arranged in the radial direction of the first groove. The side surface away from the axis of the first groove among the two side surfaces of the second groove arranged in the radial direction of the first groove is parallel to the axis of the first groove. The other two opposite side surfaces of the second groove are arranged in the circumferential direction of the first groove. The distance between the two side surfaces of the second groove arranged in the circumferential direction of the first groove gradually approaches each other from the upper end to the lower end of the lower die. The side surface of the second groove close to the axis of the first groove in the radial direction of the first groove includes a first surface and a second surface. The first surface and the second surface are arranged in the axial direction of the first groove, and the first surface is closer to the first groove than the second surface. The first surface gradually moves away from the axis of the first groove from the first groove to the position where it contacts the second surface, and the second surface is parallel to the axis of the first groove.

[0009] Preferably, the two piston blocks are respectively slidably connected to the two side surfaces of the second groove in the circumferential direction of the first groove, and each piston block is respectively slidably connected to the second surface and the side surface of the second groove away from the axis of the first groove in the radial direction of the first groove. There is a gap between the two piston blocks, and the second groove can be partitioned when the two piston blocks abut.

[0010] Preferably, a water supply device is arranged on the base. The water supply device communicates with the second groove and is located below the piston block for supplying liquid to the second groove.

[0011] Preferably, the driving mechanism includes an electric push rod and a connecting plate. The electric push rod is vertically installed on the base, and the electric push rod expands and contracts in the vertical direction. The connecting plate is fixedly installed at the end of the electric push rod away from the base. Multiple connecting rods are respectively connected to the connecting plate, and sensors are arranged on the connecting rods. The sensors are electrically connected to the electric push rod.

[0012] Preferably, the pressure regulating mechanism includes an air pump and a pipeline. The air pump is connected to the connecting rod through the pipeline, and the air pump communicates with the connecting rod.

[0013] Preferably, a control panel is arranged on the base. The control panel is electrically connected to the air pump, the electric push rod, and the water supply device respectively.

[0014] Preferably, one side of each piston block close to the other piston block is provided with a boss and a chute. There is a gap between the boss and the chute, and the shapes and sizes of the boss and the chute are the same. The boss on one piston block is slidably connected to the chute on the other piston block. The bottom surface of the boss gradually approaches the upper surface of the boss from the side close to the piston block where it is located to the side far from the piston block where it is located. The shape of the chute is adapted to the boss.

[0015] Preferably, one end of the connecting rod close to the piston block is provided with a sliding rod. The sliding rod extends in the horizontal direction. The piston block is slidably arranged on the sliding rod in the horizontal direction. The connecting rod is located between the two piston blocks. Two springs are sleeved on the sliding rod. One end of one spring is respectively connected to the connecting rod and one piston block, and the two ends of the other spring are respectively connected to the connecting rod and the other piston block.

[0016] Preferably, a receiving groove is formed on one side of the base close to the lower die. The receiving groove is communicated with the second groove, and the size of the receiving groove is the same as the cross-sectional size of the second groove on the lower surface of the lower die. The piston block can slide in the receiving groove, and the piston block is in contact with the surface of the receiving groove. The connecting rod penetrates through the base and is slidably arranged in the receiving groove. The inside of the connecting rod is hollow, and air holes are provided on the connecting rod. The air holes are located in the receiving groove.

[0017] The beneficial effects of the present invention are as follows: By setting the pressure regulating component, after the raw material enters the first groove, the pressure regulating component controls the first groove and the second groove to be in a negative pressure environment, thereby assisting the flow of the raw material in the first groove, improving the flow speed of the raw material and increasing the flow distance of the raw material. Through the cooperation of the piston block and the driving mechanism, the extension distance of the raw material in the second groove can be accurately controlled, thereby controlling the length of the clamping jaw and improving the forming quality of the workpiece. Through the cooperation of the pressure regulating component and the driving mechanism, the forging process and workstations of the workpiece can be reduced. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of a hot forging die for an automotive generator pole provided by an embodiment of the present invention;

[0019] Figure 2 It is a split view of a hot forging die for an automotive generator pole provided by an embodiment of the present invention;

[0020] Figure 3 It is a front view of a hot forging die for an automotive generator pole provided by an embodiment of the present invention;

[0021] Figure 4 It is Figure 3 a cross-sectional view taken along the line A-A in

[0022] Figure 5 It is Figure 4 an enlarged view at C in

[0023] Figure 6 The top view of a hot forging die for an automotive generator pole provided by an embodiment of the present invention;

[0024] Figure 7 is Figure 6 the sectional view taken along the B-B direction in

[0025] Figure 8 is Figure 7 the enlarged view at D in

[0026] Figure 9 The top view of the lower die of a hot forging die for an automotive generator pole provided by an embodiment of the present invention;

[0027] Figure 10 is Figure 9 the enlarged view at E in

[0028] Figure 11 The structural schematic diagram of a piston block of a hot forging die for an automotive generator pole provided by an embodiment of the present invention.

[0029] Wherein: 100, base; 101, lower die; 102, upper die; 103, first groove; 104, second groove; 105, disc; 106, jaw; 107, piston block; 108, connecting rod; 109, first surface; 110, second surface; 111, boss; 112, chute; 113, slide bar; 114, spring; 115, receiving groove; 116, air hole; 117, electric push rod; 118, connecting plate. Detailed implementation manners

[0030] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any sequential or technical meanings. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, both include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0032] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0033] As Figures 1 to 10 shown, a hot forging die for an automotive generator pole provided by an embodiment of the present invention includes a base 100, a lower die 101, an upper die 102, a forging assisting mechanism, a driving mechanism and a pressure regulating mechanism. The base 100 is fixedly arranged, the lower die 101 is fixedly arranged above the base 100, the upper die 102 is slidably arranged above the lower die 101 in the vertical direction, the upper die 102 and the lower die 101 can be closed. A first groove 103 and a second groove 104 are formed in the lower die 101. The first groove 103 is formed on the upper surface of the lower die 101. There are a plurality of second grooves 104, and the plurality of second grooves 104 are evenly distributed around the circumferential surface of the first groove 103. The first groove 103 communicates with the plurality of second grooves 104 on the upper surface of the lower die 101. The second groove 104 penetrates through the upper and lower surfaces of the lower die 101. A third groove is formed in the upper die 102. When the upper die 102 and the lower die 101 are closed, the first groove 103 and the second groove 104 both communicate with the third groove. The raw material forms a workpiece in the first groove 103, the second groove 104 and the third groove. The workpiece includes a disc 105 and a clamping jaw 106. The disc 105 is located in the first groove 103 and the third groove, and the clamping jaw 106 is located in the second groove 104.

[0034] The number of the forging assisting mechanisms is the same as that of the second grooves 104. Each forging assisting mechanism includes a connecting rod 108 and two piston blocks 107. The two piston blocks 107 are slidably arranged in a second groove 104 in the vertical direction, and the two piston blocks 107 can partition the second groove 104. Each piston block 107 is located below the clamping jaw 106 and can contact the clamping jaw 106. The connecting rod 108 is slidably arranged below the piston block 107 in the vertical direction, and the connecting rod 108 and the piston block 107 are slidably connected in the horizontal direction. A pressure regulating component is arranged on the base 100 and communicates with the second groove 104 for controlling the pressure in the second groove 104. The driving mechanism is arranged on the base 100 and is used for controlling the connecting rod 108 to slide in the vertical direction.

[0035] When the upper die 102 and the lower die 101 are closed, the raw materials in the second groove 104 and the third groove flow into the first groove 103 after filling the second groove 104 and the third groove. A pressure regulating component is set. After the raw materials enter the first groove 103, the pressure regulating component controls the first groove 103 and the second groove 104 to be in a negative pressure environment, so as to assist the raw materials to move more easily into the second groove 104 after being extruded by the upper die 102 in the first groove 103, improve the extension speed of the raw materials and increase the extension distance of the raw materials. Through the cooperation of the piston block 107 and the driving mechanism, the extension distance of the raw materials in the second groove 104 can be accurately controlled, so as to control the length of the clamping jaw 106 and improve the forming quality of the workpiece. Through the cooperation of the pressure regulating component and the driving mechanism, the forging process and workstations of the workpiece can be reduced.

[0036] In this embodiment, the first groove 103 is cylindrical, and the axis of the first groove 103 extends in the vertical direction. Each second groove 104 has four side faces, and the four side faces are pairwise opposite, and two of the opposite side faces are arranged in the radial direction of the axis of the first groove 103. The side face of the second groove 104 that is far from the axis of the first groove 103 among the two side faces arranged in the radial direction of the axis of the first groove 103 is parallel to the axis of the first groove 103. The other two opposite side faces of the second groove 104 are arranged in the circumferential direction of the axis of the first groove 103. The distance between the two side faces of the second groove 104 arranged in the circumferential direction of the axis of the first groove 103 gradually approaches each other from the upper end to the lower end of the lower die 101. The side face of the second groove 104 that is close to the axis of the first groove 103 in the radial direction of the first groove 103 includes a first face 109 and a second face 110. The first face 109 and the second face 110 are arranged in the axial direction of the first groove 103, and the first face 109 is closer to the first groove 103 than the second face 110. The first face 109 gradually moves away from the axis of the first groove 103 from the first groove 103 to the position where it contacts the second face 110. The second face 110 is parallel to the axis of the first groove 103. The large end of the clamping jaw 106 formed in the second groove 104 is closer to the upper surface of the lower die 101 than its small end, which is convenient for the demolding of the workpiece.

[0037] In this embodiment, the two piston blocks 107 are respectively slidably connected to the two side faces of the second groove 104 in the circumferential direction of the first groove 103, and each piston block 107 is respectively slidably connected to the second face 110 and the side face of the second groove 104 that is far from the axis of the first groove 103 in the radial direction of the first groove 103. There is a distance between the two piston blocks 107. When the two piston blocks 107 are in contact, the second groove 104 can be partitioned. When the two piston blocks 107 are in contact, the raw materials in contact with the piston blocks 107 cannot pass through the piston blocks 107 under the suction of the pressure regulating component and the pressure of the upper die 102, which is convenient for shaping the raw materials.

[0038] In this embodiment, a water supply device is provided on the base 100. The water supply device is connected to the second groove 104 and is located below the piston block 107, and is used to supply liquid to the second groove 104. After the workpiece is formed and demolded, the two piston blocks 107 move away from each other, and the water supply device passes liquid into the second groove 104 through the gap between the two piston blocks 107, which can effectively cool the lower mold 101 and clean the oxides of the workpiece attached to the surface of the second groove 104.

[0039] In this embodiment, on one side of each piston block 107 close to the other piston block 107, there are a boss 111 and a chute 112. There is a gap between the boss 111 and the chute 112, and the shapes and sizes of the boss 111 and the chute 112 are the same. The boss 111 on one piston block 107 is slidably connected to the chute 112 on the other piston block 107. The bottom surface of the boss 111 gradually approaches the upper surface of the boss 111 from the side close to the piston block 107 where it is located to the side far from the piston block 107 where it is located. The shape of the chute 112 is adapted to that of the boss 111. When the two piston blocks 107 approach each other, the convex block on one piston block 107 slides in the chute 112 on the other piston block 107, and the cross-sectional area of the chute 112 connecting the second groove 104 and the receiving groove 115 decreases. When the moving speed of the piston block 107 remains unchanged, the speed of the liquid in the receiving groove 115 passing through the chute 112 increases, and the impact force of the liquid on the second groove 104 increases, which can further reduce the impurities of the raw materials on the surface of the second groove 104.

[0040] In this embodiment, a sliding rod 113 is provided at one end of the connecting rod 108 close to the piston block 107. The sliding rod 113 extends in the horizontal direction. The piston block 107 is slidably arranged on the sliding rod 113 in the horizontal direction, and the connecting rod 108 is located between the two piston blocks 107. Two springs 114 are sleeved on the sliding rod 113. The two ends of one spring 114 are respectively connected to the connecting rod 108 and one piston block 107, and the two ends of the other spring 114 are respectively connected to the connecting rod 108 and the other piston block 107. After the workpiece is formed, when the connecting rod 108 approaches the first groove 103 in the vertical direction, the two piston blocks 107 move away from each other under the action of the springs 114, and the pressure regulating component and the water supply device can process the workpiece or the second groove 104 through the gap between the two piston blocks 107.

[0041] In this embodiment, a receiving groove 115 is formed on one side of the base 100 close to the lower die 101. The receiving groove 115 is communicated with the second groove 104, and the size of the receiving groove 115 is the same as the cross-sectional size of the second groove 104 on the lower surface of the lower die 101. The piston block 107 can slide in the receiving groove 115, and the piston block 107 is in contact with the surface of the receiving groove 115. The connecting rod 108 penetrates through the base 100 and is slidably arranged in the receiving groove 115. The inside of the connecting rod 108 is hollow, and an air hole 116 is provided on the connecting rod 108. The air hole 116 is located in the receiving groove 115. The water supply device is connected to the connecting rod 108 and is communicated with the connecting rod 108. The water supply device indirectly cools the lower die 101 by supplying liquid into the receiving groove 115.

[0042] In this embodiment, the driving mechanism includes an electric push rod 117 and a connecting plate 118. The electric push rod 117 is vertically installed on the base 100, and the electric push rod 117 expands and contracts in the vertical direction. The connecting plate 118 is fixedly installed at the end of the electric push rod 117 away from the base 100. The connecting plate 118 is connected to the connecting rod 108. A sensor is provided on the connecting rod 108, and the sensor is electrically connected to the electric push rod 117. When the raw material contacts the piston block 107, a force will be exerted on the piston block 107. The piston block 107 conducts the received force to the connecting rod 108. The sensor on the connecting rod 108 will control the start of the electric push rod 117 according to the received signal, so as to control the piston block 107 to move actively together with the raw material.

[0043] In this embodiment, the pressure regulating mechanism includes an air pump and a pipeline. The air pump is connected to the connecting rod 108 through the pipeline and is communicated with the connecting rod 108. A control panel is provided on the base 100. The control panel is electrically connected to the air pump, the electric push rod 117, and the water supply device respectively, and is used to control the operation of the electric push rod 117, the air pump, and the water supply device. A limiter is provided in the second groove 104. The limiter is electrically connected to the electric push rod 117 and the air pump respectively, and the limiter is slidably connected to the piston block 107. The limiter can only control the electric push rod 117 and the air pump when the upper die 102 and the lower die 101 are closed. When the piston block 107 slides into contact with the limiter, the electric push rod 117 will stop extending, and at the same time the air pump stops working and immediately rotates in the reverse direction to fill the second groove 104 with gas, assisting the electric push rod 117 to hinder the movement of the piston block 107 and reducing the force received by the electric push rod 117. At the same time, after the workpiece is formed, as the electric push rod 117 pushes the workpiece upward through the connecting rod 108 and the piston block 107, the air pump continues to fill the second groove 104 with gas to blow away the impurities in the second groove 104 and cool the workpiece.

[0044] The working principle and working method of an automotive generator pole hot forging die provided in this embodiment are as follows:

[0045] First, the upper mold 102 and the lower mold 101 are separated, and the raw material is placed in the first groove 103. Then, the upper mold 102 is controlled to move closer to the lower mold 101. When the upper mold 102 and the lower mold 101 are closed, the raw material is squeezed and fills the entire first groove 103 and the third groove, and the raw material flows into the second groove 104. When the raw material flowing in the second groove 104 contacts the piston block 107, the piston block 107 transmits the force received to the connecting rod 108. After the sensor on the connecting rod 108 detects the preset signal value, it controls the electric push rod 117 to extend. The extension of the electric push rod 117 drives the connecting rod 108 to move downward through the connecting plate 118. The connecting rod 108 drives the piston block 107 to move downward in the second groove 104 along the second surface 110. During the process, the piston block 107 is always in contact with the raw material.

[0046] When the raw material in each second groove 104 contacts the two piston blocks 107, the piston block 107 actively moves along the flow of the raw material under the action of the electric push rod 117, and the raw material in contact with the piston block 107 will not flow into the slide groove 112. When the two piston blocks 107 slide downward in the second groove 104, the two piston blocks 107 approach each other under the action of the two side surfaces of the second groove 104 arranged in the circumferential direction of the axis of the first groove 103, and the boss 111 slides into the slide groove 112, and the slide groove 112 is gradually blocked.

[0047] When the upper mold 102 and the lower mold 101 are closed, the air pump starts to pump air from the receiving groove 115 and the second groove 104 through the connecting rod 108, and the excess gas in the receiving groove 115 and the second groove 104 is pumped out, and the pressure in the receiving groove 115 and the second groove 104 is reduced. As the two piston blocks 107 are completely in contact, the slide groove 112 is completely blocked by the protrusion, and the raw material and the receiving groove 115 are separated by the piston block 107. At this time, the pressure in the receiving groove 115 is still decreasing, and the electric push rod 117 continues to drive the piston block 107 to move downward; the raw material The raw material continues to flow in the second groove 104 until the piston block 107 contacts the limiter, the electric push rod 117 stops extending, and the piston block 107 stops moving. The air pump no longer extracts the gas in the receiving groove 115, but fills the receiving groove 115 with gas. The pressure in the receiving groove 115 increases, which generates a reverse thrust on the piston block 107, and cooperates with the electric push rod 117 to hinder the flow of the raw material and relieve the force on the electric push rod 117. The raw material in the second groove 104 no longer flows and remains still for a certain period of time, so that the raw material is shaped and a workpiece is formed.

[0048] After the raw material forms the workpiece, the upper die 102 moves away from the lower die 101. At this time, the air pump still fills the receiving groove 115 with gas. The electric push rod 117 is controlled to contract through the control panel. The electric push rod 117 drives the connecting plate 118 to approach the base 100. The connecting plate 118 pushes the piston block 107 to move upward through the connecting rod 108. The piston block 107 moves upward to the connection position between the first surface 109 and the second surface 110. During the process, the workpiece is pushed upward. While the piston block 107 moves, the two fitting piston blocks 107 separate, and the convex blocks slide in the sliding grooves 112. The gas in the receiving groove 115 is blown towards the workpiece through the sliding grooves 112. When the workpiece slides in the lower die 101, gaps are generated between the disc 105 and the first groove 103, and between the clamping jaws 106 and the second groove 104. The gas flows on the surface of the workpiece through these gaps, which can cool the workpiece and blow away the impurities in the second groove 104, and also facilitate the demolding of the workpiece.

[0049] After the workpiece is discharged, the air pump is controlled to stop working, and the connection between the air pump and the connecting rod 108 is disconnected. The water supply device is started. The water supply device injects a certain amount of liquid into the receiving groove 115 through the hollow pipe inside the connecting rod 108 and the air hole 116, and then stops and plugs the filling port to prevent the liquid from flowing back. The liquid rises into the second groove 104 and does not exceed the height of the piston block 107. Then the electric push rod 117 starts to extend and drives the piston block 107 to move downward. When the piston block 107 passes through the liquid surface, the liquid is squeezed and sprayed out from the gap between the sliding groove 112 and the two piston blocks 107. The sprayed liquid impacts the impurities attached to the surface of the second groove 104, causing them to be discharged from the second groove 104. As the piston block 107 moves downward, the cross-sectional area of the liquid passing through the sliding groove 112 gradually decreases, and the flow rate of the liquid discharged from the sliding groove 112 increases, improving the cleaning effect on the second groove 104.

[0050] After the two piston blocks 107 abut, the sliding groove 112 is completely blocked. At this time, the filling port will open. The piston block 107 slides in the receiving groove 115. The liquid in the receiving groove 115 is squeezed into the connecting rod 108 through the air hole 116 and is discharged from the connecting rod 108 into the water supply device. Thus, a hot forging process is completed.

[0051] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should all be considered as within the scope described in this specification.

[0052] The above-described embodiments merely represent several implementation manners of the present invention. Their descriptions are relatively specific and detailed, but should not be construed as limiting the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. An automotive generator pole hot forging die, characterized in that, Including: A base, a lower die, an upper die, a forging assisting mechanism, a driving mechanism and a pressure regulating mechanism. The base is fixedly arranged. The lower die is fixedly arranged above the base. The upper die is slidably arranged above the lower die in the vertical direction. The upper die and the lower die can be closed. A first groove and a second groove are formed in the lower die. The first groove is formed on the upper surface of the lower die. There are multiple second grooves, and the multiple second grooves are evenly distributed around the circumferential surface of the first groove. The first groove communicates with the multiple second grooves on the upper surface of the lower die. The second groove penetrates through the upper and lower surfaces of the lower die. A third groove is formed in the upper die. When the upper die and the lower die are closed, the first groove and the second groove both communicate with the third groove. The raw material forms a workpiece in the first groove, the second groove and the third groove. The workpiece includes a disc and a clamping jaw. The disc is located in the first groove and the third groove. The clamping jaw is located in the second groove. The number of the forging assisting mechanisms is the same as the number of the second grooves. Each forging assisting mechanism includes a connecting rod and two piston blocks. The two piston blocks are slidably arranged in a second groove in the vertical direction, and the two piston blocks can partition the second groove. Each piston block is located below the clamping jaw and can contact the clamping jaw. The connecting rod is slidably arranged below the piston block in the vertical direction, and the connecting rod and the piston block are slidably connected in the horizontal direction. The pressure regulating assembly is arranged on the base and communicates with the second groove for controlling the pressure in the second groove. The driving mechanism is arranged on the base and is used for controlling the connecting rod to slide in the vertical direction. The first groove is cylindrical. Each second groove has four side surfaces, and the four side surfaces are pairwise opposite. Two of the opposite side surfaces are arranged in the radial direction of the first groove, and the other two opposite side surfaces in the second groove are arranged in the circumferential direction of the first groove. One side surface of the second groove close to the axis of the first groove in the radial direction of the first groove includes a second surface, and the second surface is parallel to the axis of the first groove. The two piston blocks are respectively slidably connected with two side surfaces of the second groove in the circumferential direction of the first groove, and each piston block is respectively slidably connected with the second surface and one side surface of the second groove far from the axis of the first groove in the radial direction of the first groove. There is a distance between the two piston blocks, and the second groove can be partitioned when the two piston blocks abut.

2. The hot forging die for the pole of an automotive generator according to claim 1, characterized in that One side surface of the two side surfaces of the second groove arranged in the radial direction of the first groove far from the axis of the first groove is parallel to the axis of the first groove. The distance between the two side surfaces of the second groove arranged in the circumferential direction of the first groove gradually approaches each other from the upper end to the lower end of the lower die. One side surface of the second groove close to the axis of the first groove in the radial direction of the first groove further includes a first surface. The first surface and the second surface are arranged in the axial direction of the first groove, and the first surface is closer to the first groove than the second surface. The first surface gradually moves away from the axis of the first groove from the first groove to the position where it contacts the second surface.

3. The pole hot forging die of an automotive generator according to claim 1, characterized in that, A water supply device is arranged on the base. The water supply device communicates with the second groove and is located below the piston block for supplying liquid to the second groove.

4. A hot forging die for automotive generator poles according to claim 3, characterized in that, The driving mechanism includes an electric push rod and a connecting plate. The electric push rod is vertically installed on the base, and the electric push rod expands and contracts in the vertical direction. The connecting plate is fixedly installed at one end of the electric push rod away from the base. A plurality of connecting rods are respectively connected to the connecting plate. Sensors are provided on the connecting rods, and the sensors are electrically connected to the electric push rod.

5. The hot forging die for the magnetic pole of an automotive generator according to claim 4, wherein The pressure regulating mechanism includes an air pump and a pipeline. The air pump is connected to the connecting rod through the pipeline, and the air pump is in communication with the connecting rod.

6. The hot forging die for the pole of an automotive generator according to claim 5, characterized in that A control panel is provided on the base, and the control panel is electrically connected to the air pump, the electric push rod, and the water supply device respectively.

7. A hot forging die for automotive generator poles according to claim 1, characterized in that, On one side of each piston block close to the other piston block, there are a boss and a chute. There is a gap between the boss and the chute, and the shapes and sizes of the boss and the chute are the same. The boss on one piston block is slidably connected to the chute on the other piston block. The bottom surface of the boss gradually approaches the upper surface of the boss from the side close to the piston block where it is located to the side away from the piston block where it is located. The shape of the chute is adapted to the boss.

8. A hot forging die for an automotive generator pole according to claim 1, characterized in that A slide rod is provided at one end of the connecting rod close to the piston block. The slide rod extends in the horizontal direction. The piston block is slidably arranged on the slide rod in the horizontal direction, and the connecting rod is located between the two piston blocks. Two springs are sleeved on the slide rod. One end of one spring is respectively connected to the connecting rod and one piston block, and the two ends of the other spring are respectively connected to the connecting rod and the other piston block.

9. The automotive generator pole hot forging die according to claim 1, characterized in that, A receiving groove is formed on one surface of the base close to the lower die. The receiving groove is communicated with the second groove, and the size of the receiving groove is the same as the cross-sectional size of the second groove on the lower surface of the lower die. The piston block can slide in the receiving groove, and the piston block is in contact with the surface of the receiving groove. The connecting rod penetrates through the base and is slidably arranged in the receiving groove. The inside of the connecting rod is hollow, and air holes are provided on the connecting rod. The air holes are located in the receiving groove.

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