A grinding wheel forming machine

Abstract

The present invention discloses a grinding wheel forming machine, which relates to the field of grinding wheel extrusion forming technology. The grinding wheel forming machine comprises: a mold, wherein the mold comprises a slide seat, a rotating seat arranged on the upper surface of the slide seat, and a mold outer cylinder placed on the upper surface of the rotating seat, wherein a pressure-maintaining plate can be placed in the mold outer cylinder; a main body pressure plate, wherein a hydraulic cylinder for driving the main body pressure plate to rise and fall is arranged above the main body pressure plate, wherein the main body pressure plate presses the pressure-maintaining plate downward to apply pressure to the metal powder in the mold outer cylinder; and a first pull hook. The present invention automatically lifts the mold outer cylinder upward during the upward return of the main body pressure plate, thereby achieving the purpose of automatic demoulding and rapid demoulding, and when the first pull hook pulls the mold outer cylinder upward, the elastic pressure rod can press the pressure-maintaining plate downward, thereby giving a downward pressure to the pressure-maintaining plate and the molding grinding wheel, and the mold outer cylinder is subjected to an upward pulling force, thereby ensuring that the two are separated from each other, and the grinding wheel will not move upward together with the mold outer cylinder, thereby ensuring demoulding.

Description

Technical Field

[0001] The invention relates to the technical field of wheel extrusion molding, in particular to a grinding wheel molding machine. Background Art

[0002] The basic steps for making a grinding wheel are to first press it through a press, then sinter it at high temperature, and finally get the required grinding wheel.

[0003] After the extrusion of the grinding wheel is completed, the press in the prior art needs to take the pressed grinding wheel out of the grinding wheel mold, which requires the grinding wheel mold to be raised. The existing raising mode is that the operator manually lifts the grinding wheel through a crowbar and then puts a pad under the grinding wheel. The problem with this operation mode is that the grinding wheel mold plus the grinding wheel is heavy, and it takes time and effort to manually lift the grinding wheel mold. There is also the risk of the entire grinding wheel mold being lifted off the workbench.

[0004] For this purpose, the patent with publication number CN207771618U proposes a press for grinding wheel molding. When the grinding wheel material is pressed and needs to be demolded, the lifting mechanism action output end of the lifting mechanism is connected to the grinding wheel mold, the lifting mechanism pulls up the grinding wheel mold, and then the pad device is placed on the lower side of the grinding wheel mold. There is no need for manpower to pry the grinding wheel mold, which reduces labor intensity and avoids danger. The lifting mechanism is set on the pressure plate, which facilitates the setting of the lifting mechanism on the one hand, and when the lifting stroke of the lifting mechanism is insufficient or damaged, the moving stroke of the pressure plate itself can also be compensated to a certain extent to ensure the smooth lifting of the grinding wheel mold.

[0005] However, there are still problems: 1. The lifting mechanism needs to be manually operated, resulting in low demoulding efficiency; 2. After demoulding, the grinding wheel still needs to be manually pressed down to demould the grinding wheel, but in fact, the stress between the grinding wheel and the mold is relatively large, and manual demoulding is still relatively laborious. Summary of the invention

[0006] In view of the deficiencies of the prior art, the present invention provides a grinding wheel forming machine, which solves the problems of low demoulding efficiency and laborious manual demoulding in the prior art.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a grinding wheel forming machine, comprising: a mold, the mold comprising a slide seat, a rotating seat arranged on the upper surface of the slide seat and a mold outer cylinder placed on the upper surface of the rotating seat, a pressure holding plate can be placed in the mold outer cylinder; a main body pressure plate, a hydraulic cylinder for driving the main body pressure plate to rise and fall is arranged above the main body pressure plate, the main body pressure plate presses the pressure holding plate down to apply pressure to the metal powder in the mold outer cylinder; a first hook, the first hook comprises a rod body whose upper end is rotatably installed on both sides of the lower surface of the main body pressure plate through a torsion spring, and a first hook body arranged at the lower end of the rod body, the torsion spring is in a natural state When the rod body is in a vertical state, first force-bearing hooks are provided on both sides of the mold outer cylinder. The first hook body opens outward when it descends and passes through the first force-bearing hook, and the rod body returns to a natural state through a torsion spring when it descends below the first force-bearing hook, so that when the main pressure plate moves upward, the mold outer cylinder can be pulled upward through the first force-bearing hook, so that the mold outer cylinder can be separated from the molding grinding wheel in the vertical direction; an elastic pressure rod, guide holes are provided near the two sides of the main pressure plate, and the elastic pressure rod passes through the guide holes. The rise of the main pressure plate can drive the elastic pressure rod to descend, so that when the first pull hook pulls the mold outer cylinder upward, the elastic pressure rod can press the pressure holding plate downward.

[0008] Furthermore, a slope groove is provided on the upper surface of the pressure maintaining plate at a position opposite to the elastic pressure rod. When the first pull hook pulls the mold outer cylinder upward through the first force-bearing hook, the elastic pressure rod is inserted downward into the slope groove, so that the elastic pressure rod pushes the pressure maintaining plate and the molding grinding wheel to rotate on the rotating seat through the slope groove, thereby causing circumferential relative separation between the molding grinding wheel and the mold outer cylinder.

[0009] Furthermore, a limiting groove is provided on the upper surface of the first hook body, and a limiting block is provided on the lower surface of the first force-bearing hook. When the first hook body is located below the first force-bearing hook, the limiting block is inserted into the limiting groove, so that the first pull hook limits the mold outer cylinder to rotate on the rotating seat.

[0010] Furthermore, a slide groove is provided on the upper surface of the base, and notches are provided below both sides of the slide seat, and the slide seat is embedded in the slide groove through the notches, so that the slide seat is circumferentially locked in the slide groove.

[0011] Furthermore, L-shaped side blocks are fixed on both sides of the upper surface of the slide seat, and notches are opened below both sides of the mold outer cylinder. The side blocks are embedded in the notches, and the notches are aligned with the grooves to prevent the mold outer cylinder from being placed on the rotating seat.

[0012] Furthermore, it also includes: a base, the sliding seat is located on the upper surface of the base, and a top seat is fixedly provided above the base through a column, and the hydraulic cylinder is installed in the middle of the top seat; a top pressure plate, the top pressure plate is fixed to the lower end of the piston rod of the hydraulic cylinder, the main body pressure plate is located below the top pressure plate, and a connecting rod is fixed between the main body pressure plate and the top pressure plate.

[0013] Furthermore, it also includes: a first pressure rod, which is rotatably installed on both sides of the upper surface of the top pressure plate, and a first through hole is provided on the top seat at a position opposite to the first pressure rod, so that the first pressure rod can move in the first through hole, and a first tooth portion is provided on the lower part of one side of the first pressure rod; a gear, which is rotatably installed on both sides of the lower part of the top seat, and the gear is meshed with the first tooth portion on the opposite first pressure rod; the elastic pressure rod includes a second tooth rod, and the second tooth rod is meshed with a side of the gear away from the first pressure rod, so that when the top pressure plate drives the first pressure rod to rise, the gear can drive the second tooth rod to descend; a first guide groove is provided on the upper part of the first pressure rod, and the upper part of the first pressure rod is provided with a first guide groove. A second guide groove is provided on the side away from the first tooth portion, and a spiral groove is connected between the lower ends and the upper ends of the first guide groove and the second guide groove, and the two spiral grooves are respectively arranged on both sides of the first pressure rod; a protrusion that can change its position in the first guide groove, the spiral groove and the second guide groove is fixed on the side close to the hydraulic cylinder in the middle of the first through hole, when the first pressure rod descends, the first tooth portion is located on the side away from the gear, and the protrusion rises relatively in the first guide groove, when the first pressure rod rises, it is driven to rotate 180° so that the first tooth portion rotates to the side meshing with the gear, and when the first pressure rod rises, it drives the gear to rotate through the first tooth portion, so that the gear drives the second tooth rod to descend.

[0014] Furthermore, a second through hole is provided on the top seat at a position opposite to the second gear rod, and guide holes are provided on both the top pressure plate and the main body pressure plate, so that the second gear rod can move axially in the guide hole;

[0015] The lower end of the second gear rod is provided with a receiving hole, a compensation spring is installed in the receiving hole, a pressure rod body is fixed to the lower end of the compensation spring, and the lower end of the pressure rod body is located outside the second gear rod.

[0016] Furthermore, an inner mold is provided in the middle part of the upper surface of the rotating seat so that the grinding wheel has a hollow structure; the upper end of the inner mold is higher than the pressure maintaining plate, and second force hooks are provided on both sides of the upper end of the inner mold, and a second pull hook is provided on the lower surface of the top pressure plate at a position opposite to the second force hook; a hollow part is opened in the middle part of the main body pressure plate for the upper end of the inner mold to pass through.

[0017] Furthermore, external pressure components are installed on both sides of the lower surface of the main pressure plate at positions opposite to the outer cylinder of the mold, and an internal pressure component is provided in the middle of the lower surface of the top pressure plate. When the main pressure plate presses down on the pressure holding plate, the external pressure component presses down on the outer cylinder of the mold, and the internal pressure component presses down on the inner mold.

[0018] The present invention has the following beneficial effects:

[0019] (1) In the grinding wheel forming machine, the mold base, the mold outer cylinder and the pressure holding plate are independent of each other. When the main pressure plate returns upward, the mold outer cylinder is automatically lifted upward to achieve the purpose of automatic demolding and rapid demolding, thereby improving the demolding efficiency. When the first pull hook pulls the mold outer cylinder upward, the elastic pressure rod can press the pressure holding plate downward, thereby giving the pressure holding plate and the forming grinding wheel a downward pressure, and the mold outer cylinder is subjected to an upward pulling force, thereby ensuring that the two are separated from each other, and the grinding wheel will not move upward with the mold outer cylinder, thereby ensuring demolding.

[0020] (2) In the grinding wheel forming machine, the elastic pressure rod of the present invention is inserted into the inclined groove after being lowered, which can give a tangential thrust to the pressure holding plate, thereby pushing the pressure holding plate to rotate through the inclined groove. The pressure holding plate can drive the forming grinding wheel to rotate on the rotating seat, so that the forming grinding wheel rotates relative to the outer cylinder of the mold. The shear force originally exerted on the forming grinding wheel by the axial direction of the outer cylinder of the mold can be dispersed to the circumferential direction, reducing the shear force exerted on the forming grinding wheel in the radial direction, thereby avoiding the problem of slight fracture or slight deformation of the grinding wheel in the radial direction caused by the excessive axial shear force of the outer cylinder of the mold, thereby ensuring the strength of the grinding wheel after sintering.

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an overall diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the main internal structure of the present invention;

[0024] Figure 3 For the present invention Figure 2 Stereoscopic image of

[0025] Figure 4 An exploded view of the mold of the present invention;

[0026] Figure 5 For the present invention Figure 3 A partial map of

[0027] Figure 6 is an exploded view of the first draw hook of the present invention;

[0028] Figure 7 It is a partial cutaway view of the pressure-maintaining plate of the present invention;

[0029] Figure 8 This is a bottom view of the top pressure plate of the present invention;

[0030] Fig. 9 For the present invention Figure 5 Schematic diagram of the unassembled top seat;

[0031] Fig.10 For the present invention Fig. 9 Exploded diagram of .

[0032] Fig.11 It is a schematic diagram of the internal structure of the elastic pressure rod of the present invention.

[0033] Fig.12 is a schematic structural diagram of the first pressure rod of the present invention;

[0034] Fig.13 This is a state diagram of the main body pressing plate of the present invention not being pressed down;

[0035] Fig.14 The present invention is based on Fig.13 The state diagram of the main body pressing plate pressing down a certain distance in the state;

[0036] Fig.15 The present invention is based on Fig.14 The state diagram of the main body pressure plate being completely pressed down in the state;

[0037] Fig.16 The present invention is based on Fig.15 State diagram of the main pressure plate rising in the state.

[0038] In the figure, 1, base; 101, slide; 2, column; 3, top seat; 4, slide seat; 41, rotating seat; 42, side block; 43, missing slot; 5, first force hook; 51, limit block; 6, first pull hook; 61, rod body; 62, first hook body; 63, torsion spring; 64, pin shaft; 65, limit slot; 7, external pressure assembly; 8, elastic pressure rod; 81, second gear rod; 82, pressure rod body; 83, compensation spring; 9, internal pressure assembly Part; 10, connecting rod; 11, hydraulic cylinder; 12, first pressure rod; 121, first guide groove; 122, second guide groove; 123, spiral groove; 13, outer tube of mold; 131, notch; 14, main pressure plate; 141, hollow part; 142, guide hole; 15, top pressure plate; 16, second force hook; 17, second pull hook; 18, pressure holding plate; 19, inner mold; 20, gear; 21, ramp groove; 22, protrusion. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] According to the following Figure 1 - Fig.16 The grinding wheel forming machine provided by the embodiment of the present invention is described.

[0042] See also Figure 1 - Figure 4 As shown, an embodiment of the present invention provides a grinding wheel forming machine, including a base 1, and a mold for accommodating metal powder required for forming a grinding wheel is arranged on the upper surface of the base 1, the mold includes a slide 4 and a rotating seat 41 arranged on the upper surface of the slide 4, the slide 4 and the rotating seat 41 serve as a mold seat, and a mold outer cylinder 13 is placed on the upper surface of the rotating seat 41, so that the mold seat and the mold outer cylinder 13 form a mold body, after metal powder is placed in the mold body and scraped evenly, a pressure keeping plate 18 is placed in the mold body, and the height of the pressure keeping plate 18 should protrude from the upper surface of the mold body, so that when the pressure keeping plate 18 is pressed down, the pressure keeping plate 18 can press down the metal powder, thereby realizing the process of converting the metal powder into a formed grinding wheel, and after this process, the formed grinding wheel needs to be sintered at high temperature to obtain a grinding wheel with a required hardness. Therefore, the mold in the grinding wheel forming machine provided in the embodiment of the present invention is a separable mold, that is, the mold base, the mold outer cylinder 13 and the pressure maintaining plate 18 are independent of each other, thereby facilitating the separation of the three components and providing positive conditions for demolding the grinding wheel formed in the mold.

[0043] In order to achieve downward extrusion of the pressure holding plate 18, a main body pressure plate 14 is provided here. The main body pressure plate 14 is located above the base 1. A hydraulic cylinder 11 is provided above the main body pressure plate 14 for driving the main body pressure plate 14 to rise and fall. The main body pressure plate 14 presses the pressure holding plate 18 downward to apply pressure to the metal powder in the outer cylinder 13 of the mold.

[0044] Combination Figure 2 , Figure 3 and Figure 6As shown, in order to realize automatic and rapid separation of the mold outer cylinder 13 and the grinding wheel after pressing and forming, a first draw hook 6 is arranged on both sides of the lower surface of the main body pressing plate 14, and a first force-bearing hook 5 is arranged on both sides of the mold outer cylinder 13. The first draw hook 6 includes a rod body 61 whose upper end is rotatably installed on both sides of the lower surface of the main body pressing plate 14 through a torsion spring 63, and a first hook body 62 arranged at the lower end of the rod body 61 (of course, it is also necessary to insert a pin shaft 64 in the middle of the torsion spring 63, and both ends of the torsion spring 63 are fixed on the rod body 61, and both ends of the pin shaft 64 are fixed to the lower surface of the main body pressing plate 14 through a fixing seat). The rod body 61 can be rotated upward and can rotate along the torsion spring 63 so that the inclination angle of the rod body 61 relative to the main body pressing plate 14, when the torsion spring 63 is in a natural state, the rod body 61 is in a vertical state or the lower end is inclined toward the center position of the main body pressing plate 14 ( Figure 2 The diagram provided in the figure is a schematic diagram showing that the rod body 61 is in a vertical state when the torsion spring 63 is in a natural state). When the first hook body 62 descends and passes through the first force-bearing hook 5, it is pushed by the first force-bearing hook 5 and opens outward (the outward here means opening in a direction away from the center of the main body pressing plate 14, and the torsion spring 63 has a tendency to pull the rod body 61 back to its original position). When the rod body 61 descends to below the first force-bearing hook 5, it loses the thrust of the first force-bearing hook 5, and can thus restore to its natural state through the return action of the torsion spring 63. After the grinding wheel is formed, the main body pressing plate 14 moves upward, thereby driving the first hook 6 to move upward. The first hook body 62 can buckle upward on the first force-bearing hook 5, so that the mold outer cylinder 13 can be pulled upward through the first force-bearing hook 5 during its continuous rise, so that the mold outer cylinder 13 can be separated from the forming grinding wheel in the vertical direction. Therefore, the grinding wheel forming machine provided in the embodiment of the present invention can automatically lift the mold outer cylinder 13 upward during the upward return of the main body pressing plate 14, so as to achieve the purpose of automatic demoulding and rapid demoulding.

[0045] Combination Figure 2 , Figure 3 and Figure 5As shown, the main body pressing plate 14 needs to generate huge pressure on the pressure holding plate 18 in order to form the powder. Therefore, in fact, there is a large stress between the formed grinding wheel and the mold outer cylinder 13. This stress is very likely to cause the formed grinding wheel and the mold outer cylinder 13 to be lifted upward synchronously, resulting in the grinding wheel and the mold outer cylinder 13 being unable to separate from each other. In order to solve this problem, the present scheme provides an elastic pressure rod 8. Guide holes 142 are opened near the two sides of the main body pressing plate 14. The elastic pressure rod 8 passes through the guide holes 142. The rise of the main body pressing plate 14 can drive the elastic pressure rod 8 to descend, so that when the first pull hook 6 pulls the mold outer cylinder 13 upward, the elastic pressure rod 8 can press down the pressure holding plate 18, thereby giving the pressure holding plate 18 and the forming grinding wheel a downward pressure, so that the pressure holding plate 18 and the forming grinding wheel are subjected to downward pressure, while the mold outer cylinder 13 is subjected to upward pulling force, thereby ensuring that the two are separated from each other, and the grinding wheel will not move upward with the mold outer cylinder 13. Therefore, the grinding wheel molding machine provided by the embodiment of the present invention can ensure that the molding grinding wheel will not move upward together with the mold outer cylinder 13 when the mold outer cylinder 13 is lifted upward.

[0046] Combination Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown in the figure, when the mold outer cylinder 13 is subjected to the upward lifting force and the grinding wheel is subjected to the downward pressure so that the two are separated from each other, the grinding wheel is actually subjected to the axial shear force of the mold outer cylinder 13, and the strength of the grinding wheel after being pressed is actually insufficient, and it needs to be sintered at a high temperature in the later stage to reach the required hardness. Therefore, when the grinding wheel is subjected to the excessive axial shear force of the mold outer cylinder 13, it is very easy to cause itself to produce slight fractures or slight deformations in the radial direction. Once the grinding wheel has these slight changes, even if it is sintered at a high temperature in the later stage, it will affect the strength of the grinding wheel. Therefore, in order to solve this problem, the present invention has a pressure-maintaining plate 18 on the upper surface of the pressure-maintaining plate 18. A ramp groove 21 is provided at a position opposite to the elastic pressure rod 8 on the surface; specifically, when in use, that is, after the grinding wheel is formed, the first draw hook 6 pulls the mold outer cylinder 13 upward through the first force hook 5, and the elastic pressure rod 8 is inserted downward into the ramp groove 21. As the elastic pressure rod 8 is inserted into the inner slope of the ramp groove 21, it can give a tangential thrust to the pressure holding plate 18, thereby pushing the pressure holding plate 18 to rotate through the ramp groove 21, and the pressure holding plate 18 can drive the forming grinding wheel to rotate on the rotating seat 41, so that the forming grinding wheel rotates relative to the mold outer cylinder 13, thereby generating a circumferential relative separation between the forming grinding wheel and the mold outer cylinder 13. Therefore, the grinding wheel forming machine provided by the embodiment of the present invention can disperse the shear force of the forming grinding wheel originally subjected to the axial direction of the mold outer cylinder 13 to the circumference, reduce the shear force subjected to the forming grinding wheel in the radial direction, thereby avoiding the problem of slight fracture or slight deformation of the grinding wheel itself in the radial direction when the grinding wheel is subjected to excessive axial shear force of the mold outer cylinder 13, and ensure the strength of the grinding wheel after sintering.

[0047] like Figure 7 When the ramp groove 21 mentioned in this scheme is subjected to the pressure of the elastic pressure rod 8, there should be components of force in both the tangential and axial directions of the pressure keeping plate 18. The tangential component of force is used to push the pressure keeping plate 18 to rotate, and the axial separation is used to press down the pressure keeping plate 18, thereby preventing the pressure keeping plate 18 and the molding grinding wheel from moving upward.

[0048] Combination Figure 2-Figure 4 As shown, when the pressure maintaining plate 18 and the molding grinding wheel rotate on the rotating seat 41, the rotating seat 41 will also rotate. In order to prevent the rotating seat 41 from rotating and driving the mold outer cylinder 13 to rotate, a limiting groove 65 is provided on the upper surface of the first hook body 62, and a limiting block 51 is provided on the lower surface of the first force hook 5. When the first hook body 62 is located below the first force hook 5, the limiting block 51 is inserted into the limiting groove 65. Since the first hook body 62 cannot make a rotational motion with the rotating seat 41 as the center, when the limiting block 51 is inserted into the limiting groove 65, the first hook body 62 limits the mold outer cylinder 13 from rotating on the rotating seat 41 through the first force hook 5, so as to prevent the mold outer cylinder 13 from rotating together with the molding grinding wheel.

[0049] like Figure 1-Figure 3 As shown, in order to facilitate the feeding of metal powder into the mold body, a slide groove 101 is opened on the upper surface of the base 1, and grooves 43 are opened on the lower sides of the slide seat 4. The slide seat 4 is embedded in the slide groove 101 through the grooves 43, so that by pushing the slide seat 4, the entire mold body can be moved away from the bottom of the main body pressure plate 14, and then the powder can be poured into the mold body conveniently. Due to the action of the grooves 43 and the slide groove 101, the slide seat 4 is circumferentially locked in the slide groove 101, that is, the slide seat 4 cannot rotate, thereby ensuring the circumferential stability of the slide seat 4.

[0050] like Figure 3 and Figure 4 As shown, since the first pull hook 6 needs to cooperate with the first force hook 5 when pulling the mold outer cylinder 13 upward, the positions of the two need to be aligned in the vertical direction. In order to facilitate the alignment of the two, L-shaped side blocks 42 are fixed on both sides of the upper surface of the slide seat 4, and notches 131 are opened on both sides below the mold outer cylinder 13. The side blocks 42 are embedded in the notches 131. That is, when the mold outer cylinder 13 is placed on the rotating seat 41, aligning the notch 131 with the groove 43 is to align the first pull hook 6 with the first force hook 5, thereby achieving an anti-foolproof effect when the mold outer cylinder 13 is placed on the rotating seat 41.

[0051] like Figure 1 - Figure 3As shown, the grinding wheel forming machine provided by the embodiment of the present invention is fixedly provided with a top seat 3 above the base 1 through a column 2, the hydraulic cylinder 11 is installed in the middle of the top seat 3, the top pressure plate 15 is fixed to the lower end of the piston rod of the hydraulic cylinder 11, the main body pressure plate 14 is located below the top pressure plate 15, and a connecting rod 10 is fixed between the main body pressure plate 14 and the top pressure plate 15, so that when the hydraulic cylinder 11 is extended, the top pressure plate 15 can be pushed downward, and the top pressure plate 15 can evenly transmit the downward thrust to the main body pressure plate 14 through the connecting rod 10, and the main body pressure plate 14 can press down the pressure holding plate 18 to realize the molding of the grinding wheel.

[0052] In this embodiment, since a connecting rod 10 is fixed between the main pressure plate 14 and the top pressure plate 15, the top pressure plate 15 evenly transmits the downward thrust to the main pressure plate 14 through the connecting rod 10, so that the downward pressure of the main pressure plate 14 is more uniform.

[0053] Combination Figure 2 , Figure 3 , Figure 5 , Fig. 9 and Fig.10 As shown, in order to achieve the purpose of the main body pressure plate 14 rising and driving the elastic pressure rod 8 to descend, the grinding wheel forming machine provided by the embodiment of the present invention also includes a first pressure rod 12, a gear 20 and an elastic pressure rod 8 with a second gear rod 81.

[0054] Specifically, the first pressure rod 12 is rotatably installed on both sides of the upper surface of the top pressure plate 15, and a first through hole is provided on the top seat 3 at a position opposite to the first pressure rod 12, so that the first pressure rod 12 can move in the first through hole, that is, the first pressure rod 12 can move up or down with the top pressure plate 15, and a first tooth portion is provided at the lower part of one side of the first pressure rod 12, and the gear 20 is rotatably installed on both sides of the lower part of the top seat 3. When the first tooth portion and the gear 20 are opposite to each other, the two can mesh, and the second gear rod 81 is meshed with the side of the gear 20 away from the first pressure rod 12. When the first pressure rod 12 moves downward, the first tooth portion and the gear 20 move away from each other, so that the gear 20 does not rotate when the top pressure plate 15 drives the first pressure rod 12 downward, thereby ensuring that the position of the second gear rod 81 remains unchanged. On the contrary, when the top pressure plate 15 drives the first pressure rod 12 upward, the first tooth portion and the gear 20 are in a meshing state, so that the gear 20 can drive the second gear rod 81 to press down.

[0055] like Figure 2 , Fig.10 and Fig.12 ( Fig.12 Including a and b, which are two perspective views of the first pressure rod 12, in order to achieve the purpose that the first tooth portion and the gear 20 are separated when the first pressure rod 12 moves downward, and vice versa, when the top pressure plate 15 drives the first pressure rod 12 upward, the first tooth portion and the gear 20 are meshed with each other, this embodiment provides the following solutions:

[0056] A first guide groove 121 is provided on the upper side of the first pressure rod 12 close to the first tooth portion, and a second guide groove 122 is provided on the upper side of the first pressure rod 12 away from the first tooth portion. A spiral groove 123 is connected between the lower ends and upper ends of the first guide groove 121 and the second guide groove 122, and the two spiral grooves 123 are arranged on both sides of the first pressure rod 12.

[0057] A protrusion 22 is fixed on one side of the middle part of the first through hole close to the hydraulic cylinder 11, which can change its position in the first guide groove 121, the spiral groove 123 and the second guide groove 122 (the change of position here refers to the change of the position of the protrusion 22 relative to the four grooves when the first pressure rod 12 rises or falls). When the first pressure rod 12 falls, the first tooth portion is located on the side away from the gear 20, and at this time, the protrusion 22 rises relatively in the first guide groove 121. When the pressing is completed, when the first pressure rod 12 rises, the protrusion 22 enters the second guide groove 122 through the spiral groove 123 below, and drives the first pressure rod 12 to rotate 180°, so that the first tooth portion rotates to the side meshing with the gear 20, so that when the first pressure rod 12 rises, the gear 20 is driven to rotate through the first tooth portion, so that the gear 20 rotates, so that the second tooth rod 81 can fall during the rising process of the first pressure rod 12.

[0058] Preferably, the upper end height of the first guide groove 121 is lower than the upper end height of the second guide groove 122, the lower end of the upper spiral groove 123 is connected to the first guide groove 121, and the higher end of the upper spiral groove 123 is connected to the upper end of the second guide groove 122; the lower end height of the first guide groove 121 is higher than the lower end height of the second guide groove 122, the higher end of the lower spiral groove 123 is connected to the lower end of the first guide groove 121, and the lower end of the lower spiral groove 123 is connected to the lower end of the second guide groove 122.

[0059] Therefore, when the first hook 6 on the main body pressing plate 14 lifts the mold outer cylinder 13, the elastic pressing rod 8 can be lowered to press down the pressure-maintaining plate 18. Therefore, this solution can realize the lowering of the elastic pressing rod 8 without the need for other power.

[0060] In addition, a second through hole is provided on the top seat 3 at a position opposite to the second gear rod 81, and a guide hole 142 is provided on both the top pressure plate 15 and the main body pressure plate 14, so that the second gear rod 81 can move axially in the guide hole 142;

[0061] like Figure 5 and Fig.11 As shown, in order to realize the extension and retraction of the elastic pressure rod 8, a receiving hole is opened at the lower end of the second gear rod 81, and a compensation spring 83 is installed in the receiving hole. The lower end of the compensation spring 83 is fixed with a pressure rod body 82, and the lower end of the pressure rod body 82 is located outside the second gear rod 81.

[0062] The reason why an elastic pressure rod is needed is that after the lower end of the elastic pressure rod 8 is completely inserted into the ramp groove 21, the main pressure plate 14 continues to move upward to make the mold outer cylinder 13 higher than the height of the molding grinding wheel (complete demolding). However, while the main pressure plate 14 is still moving upward, the elastic pressure rod 8 is still moving downward. Therefore, the elasticity of the elastic pressure rod 8 can compensate for the downward movement of the elastic pressure rod 8 caused by the continuous upward movement of the main pressure plate 14.

[0063] Preferably, the compensation spring 83 is configured as a strong spring, so that the compensation spring is compressed before the pressure rod body 82 pushes the pressure-maintaining plate 18 to rotate through the slope.

[0064] Combination Figure 2 - Figure 4 As shown, since the grinding wheel needs to be assembled with a rotating shaft after forming and sintering, an axial hole should be reserved in the middle of the grinding wheel, so the mold here should also include an inner mold 19 in the middle of the upper surface of the rotating seat 41, so that the grinding wheel has a hollow structure; preferably, the upper end of the inner mold 19 is higher than the pressure holding plate 18, and second force hooks 16 are provided on both sides of the upper end of the raised part of the inner mold 19, and a second pull hook 17 is provided on the lower surface of the top pressure plate 15 at a position opposite to the second force hook 16. The structure and function of the second force hook 16 here are the same as those of the first force hook 5, and the structure and function of the second pull hook 17 are the same as those of the first pull hook 6, which will not be repeated here.

[0065] Since the upper end of the inner mold 19 is higher than the pressure maintaining plate 18, the main body pressure plate 14 will be blocked by the inner mold 19 when it is pressed down. In order to solve this problem, a hollow part 141 is opened in the middle of the main body pressure plate 14 for the upper end of the inner mold 19 to pass through, which can prevent the inner mold 19 from blocking the main body pressure plate 14.

[0066] It is best to open a limiting groove in the middle of the upper surface of the rotating seat 41, and insert the inner mold 19 into the limiting groove, so as to facilitate the assembly of the inner mold 19 on the rotating seat 41.

[0067] Combination Figure 2 , Fig. 9 and Fig.10 As shown, since the mold outer cylinder 13, the mold seat, and the inner mold 19 are independent of each other, when the pressure maintaining plate 18 presses down the metal powder, the connection between the mold outer cylinder 13 and the mold seat is not tight, resulting in leakage from the position where the lower edge of the mold outer cylinder 13 contacts the mold seat, so here, external pressure components 7 are installed on both sides of the lower surface of the main pressure plate 14 at positions opposite to the mold outer cylinder 13; the independent inner mold 19 will also have a certain instability, and the internal pressure component 9 is provided in the middle of the lower surface of the top pressure plate 15; when the main pressure plate 14 presses down the pressure maintaining plate 18, the external pressure component 7 presses down the mold outer cylinder 13, and the internal pressure component 9 presses down the inner mold 19.

[0068] like Fig.10 The above-mentioned external pressure component 7 includes a pressure spring fixed on the lower surface of the main pressure plate 14, a pad fixed on the lower end of the pressure spring, and a guide rod installed on the upper end of the pad, and the guide rod should be located in the middle of the pressure spring. When the main pressure plate 14 presses down on the pressure holding plate 18, the pad will first be pressed on the upper surface of the mold outer cylinder 13, thereby stabilizing the position of the mold outer cylinder 13, making it closely fit to the upper surface of the mold seat, and avoiding leakage.

[0069] The structure of the internal pressure assembly 9 is the same as that of the external pressure assembly 7, except that the internal pressure assembly 9 is installed on the top pressure plate 15, which will not be described in detail here.

[0070] When in use (when working), the following steps are included:

[0071] 1) By placing the inner mold 19 at the center of the upper surface of the rotating seat 41, placing the mold outer cylinder 13 on the upper surface of the rotating seat 41, and making the side block 42 stuck in the notch 131, the metal powder is fed into the space between the mold outer cylinder 13 and the inner mold 19, and the powder is smoothed, and then the pressure holding plate 18 is placed above the metal powder, and the slide seat 4 is pushed so that the entire mold is located below the main body pressure plate 14. At this time, the protrusion 22 is located in the first guide groove 121 and is not located at the lowest end of the first guide groove 121. This step forms Fig.13 Status;

[0072] 2) The hydraulic cylinder 11 extends and pushes the top pressure plate 15 and the main body pressure plate 14 downward. In this process, the first hook 6 is pushed and opened by the first force hook 5. At the same time, the top pressure plate 15 drives the first pressure rod 12 downward. At this time, the protrusion 22 moves relatively upward in the first guide groove 121. This step forms Fig.14 Status;

[0073] 3) The hydraulic cylinder 11 continues to extend and continuously pushes the main pressure plate 14 downward. At this time, the first hook body 62 of the first hook 6 reaches the bottom of the first force-bearing hook 5, so that the first hook 6 returns to a vertical state. At the same time, the protrusion 22 reaches the uppermost end of the first guide groove 121. As the hydraulic cylinder 11 continues to extend again, the internal pressure component 9 squeezes the inner mold 19, the external pressure component 7 squeezes the mold outer cylinder 13, and the main pressure plate 14 squeezes the pressure holding plate 18. The pressure holding plate 18 applies pressure to the metal powder to make the metal powder become a grinding wheel, and the protrusion 22 enters the uppermost end of the spiral groove 123, and drives the first pressure rod 12 to rotate 180° through the spiral groove 123. At this time, the first tooth portion is engaged with the gear 20. This step forms Fig.15 The status shown;

[0074] 4) After the pressing is completed, the hydraulic cylinder 11 is shortened, so that the main pressure plate 14 is lifted upward, the limit block 51 of the first force-bearing hook 5 is stuck in the limit groove 65, and the mold outer cylinder 13 is lifted upward, and the protrusion 22 enters the second guide groove 122 through the upper spiral groove 123, and moves relatively downward in the second guide groove 122. At the same time, as the hydraulic cylinder 11 continues to shorten, during the process of the first pressure rod 12 rising with the top pressure plate 15, the first tooth portion drives the gear 20 to rotate, thereby driving the second gear rod 81 and the pressure rod body 82 to move downward to squeeze the pressure holding plate 18, and the pressure rod body 82 is inserted into the ramp groove 21, so that the pressure holding plate 18 and the molding grinding wheel rotate on the rotating seat 41, so that the molding grinding wheel rotates relative to the mold outer cylinder 13, thereby generating a circumferential relative separation between the molding grinding wheel and the mold outer cylinder 13, and at the same time, the above-mentioned upward lifting of the mold outer cylinder 13 can also generate axial separation from the molding grinding wheel, and this step forms Fig.16 The status shown;

[0075] 5) Then, the forming grinding wheel, the mold outer cylinder 13 and the inner mold 19 are manually removed, and the hydraulic cylinder 11 is driven to shorten, so that the protrusion 22 enters the first guide groove 121 through the upper spiral groove 123, and the first pressure rod 12 is driven to rotate 180°, so that the first tooth portion on the first pressure rod 12 is rotated again to the side away from the gear 20.

[0076] Repeat the above steps to achieve multiple grinding wheel forming.

[0077] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0078] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A grinding wheel forming machine, characterized in that: include: A mold, the mold comprising a slide seat (4), a rotating seat (41) disposed on the upper surface of the slide seat (4), and a mold outer cylinder (13) placed on the upper surface of the rotating seat (41), wherein a pressure retaining plate (18) can be placed in the mold outer cylinder (13); A main body pressing plate (14), wherein a hydraulic cylinder (11) is provided above the main body pressing plate (14) for driving the main body pressing plate (14) to move up and down, and the main body pressing plate (14) presses down a pressure-maintaining plate (18) to apply pressure to metal powder in the outer cylinder (13) of the mold; A first draw hook (6), the first draw hook (6) comprising a rod body (61) whose upper end is rotatably mounted on both sides of the lower surface of the main body pressure plate (14) through a torsion spring (63) and a first hook body (62) provided at the lower end of the rod body (61); when the torsion spring (63) is in a natural state, the rod body (61) is in a vertical state; first force-bearing hooks (5) are provided on both sides of the mold outer cylinder (13); when the first hook body (62) descends and passes through the first force-bearing hook (5), it opens outwards; and when the rod body (61) descends to below the first force-bearing hook (5), it returns to a natural state through the torsion spring (63), so that when the main body pressure plate (14) moves upward, the mold outer cylinder (13) can be pulled upward through the first force-bearing hook (5), so that the mold outer cylinder (13) is separated from the molding grinding wheel in a vertical direction; An elastic pressure rod (8), wherein guide holes (142) are provided near two sides of the main pressure plate (14), and the elastic pressure rod (8) passes through the guide holes (142). When the main pressure plate (14) rises, it can drive the elastic pressure rod (8) to fall, so that when the first draw hook (6) pulls the outer cylinder (13) of the mold upward, the elastic pressure rod (8) can press down the pressure holding plate (18); Also includes: A base (1), the slide seat (4) is located on the upper surface of the base (1), and a top seat (3) is fixedly provided above the base (1) via a column (2), and the hydraulic cylinder (11) is installed in the middle of the top seat (3); A top pressure plate (15), wherein the top pressure plate (15) is fixed to the lower end of the piston rod of the hydraulic cylinder (11), the main body pressure plate (14) is located below the top pressure plate (15), and a connecting rod (10) is fixedly provided between the main body pressure plate (14) and the top pressure plate (15); Also includes: A first pressure rod (12), the first pressure rod (12) being rotatably mounted on both sides of the upper surface of the top pressure plate (15), a first through hole being provided on the top seat (3) at a position opposite to the first pressure rod (12), so that the first pressure rod (12) can move in the first through hole, and a first tooth portion being provided on a lower portion of one side of the first pressure rod (12); Gears (20), the gears (20) being rotatably mounted on both sides of the lower part of the top seat (3), and the gears (20) being meshed with first teeth on the opposite first pressure rods (12); The elastic pressure rod (8) comprises a second gear rod (81), the second gear rod (81) being meshed with a side of the gear (20) away from the first pressure rod (12), so that when the top pressure plate (15) drives the first pressure rod (12) to rise, the gear (20) can drive the second gear rod (81) to fall; A first guide groove (121) is provided on a side of the upper part of the first pressure rod (12) close to the first tooth portion, and a second guide groove (122) is provided on a side of the upper part of the first pressure rod (12) away from the first tooth portion, and a spiral groove (123) is connected between the lower ends and upper ends of the first guide groove (121) and the second guide groove (122), and the two spiral grooves (123) are respectively arranged on both sides of the first pressure rod (12); A protrusion (22) capable of changing position in the first guide groove (121), the spiral groove (123) and the second guide groove (122) is fixed on one side of the middle of the first through hole close to the hydraulic cylinder (11); when the first pressure rod (12) descends, the first tooth portion is located on the side away from the gear (20), and the protrusion (22) rises relatively in the first guide groove (121); when the first pressure rod (12) rises, the protrusion (22) drives the first pressure rod (12) to rotate 180 degrees through the spiral groove (123), so that the first tooth portion rotates to the side meshing with the gear (20); when the first pressure rod (12) rises, the first tooth portion drives the gear (20) to rotate, so that the gear (20) drives the second tooth rod (81) to descend.

2. A grinding wheel forming machine according to claim 1, characterized in that: A slope groove (21) is provided on the upper surface of the pressure-maintaining plate (18) at a position opposite to the elastic pressure rod (8); when the first pull hook (6) pulls the mold outer cylinder (13) upwards through the first force-bearing hook (5), the elastic pressure rod (8) is inserted downward into the slope groove (21), so that the elastic pressure rod (8) pushes the pressure-maintaining plate (18) and the molding grinding wheel to rotate on the rotating seat (41) through the slope groove (21), so that the molding grinding wheel and the mold outer cylinder (13) are circumferentially relatively separated.

3. A grinding wheel forming machine according to claim 2, characterized in that: A limiting groove (65) is provided on the upper surface of the first hook body (62), and a limiting block (51) is provided on the lower surface of the first force-bearing hook (5); when the first hook body (62) is located below the first force-bearing hook (5), the limiting block (51) is inserted into the limiting groove (65), so that the first draw hook (6) limits the mold outer cylinder (13) from rotating on the rotating seat (41).

4. A grinding wheel forming machine according to claim 3, characterized in that: It also comprises a base (1), wherein a slide groove (101) is provided on the upper surface of the base (1), and notches (43) are provided below both sides of the slide seat (4), and the slide seat (4) is embedded in the slide groove (101) through the notches (43), so that the slide seat (4) is circumferentially locked in the slide groove (101).

5. A grinding wheel forming machine according to claim 4, characterized in that: L-shaped side blocks (42) are fixed on both sides of the upper surface of the slide seat (4), and notches (131) are opened below both sides of the mold outer cylinder (13). The side blocks (42) are embedded in the notches (131), and the notches (131) are aligned with the notches (43) to prevent the mold outer cylinder (13) from being misplaced when it is placed on the rotating seat (41).

6. A grinding wheel forming machine according to claim 1, characterized in that: A second through hole is provided on the top seat (3) at a position opposite to the second gear rod (81), and a guide hole (142) is provided on both the top pressure plate (15) and the main body pressure plate (14) so ​​that the second gear rod (81) can move axially in the guide hole (142); A receiving hole is provided at the lower end of the second gear rod (81), a compensation spring (83) is installed in the receiving hole, a pressure rod body (82) is fixed to the lower end of the compensation spring (83), and the lower end of the pressure rod body (82) is located outside the second gear rod (81).

7. A grinding wheel forming machine according to claim 6, characterized in that: An inner mold (19) is provided in the middle of the upper surface of the rotating seat (41) so that the grinding wheel has a hollow structure; The upper end of the inner mold (19) is higher than the pressure-maintaining plate (18), and second force-bearing hooks (16) are provided on both sides of the upper end of the inner mold (19), and a second pull hook (17) is provided on the lower surface of the top pressure plate (15) at a position opposite to the second force-bearing hook (16); A hollow portion (141) is provided in the middle of the main body pressing plate (14) for the upper end of the inner mold (19) to pass through.

8. A grinding wheel forming machine according to claim 7, characterized in that: External pressure components (7) are installed at positions on both sides of the lower surface of the main pressure plate (14) opposite to the outer cylinder (13) of the mold, and an internal pressure component (9) is provided in the middle of the lower surface of the top pressure plate (15). When the main pressure plate (14) presses down the pressure holding plate (18), the external pressure component (7) presses down the outer cylinder (13) of the mold, and the internal pressure component (9) presses down the inner mold (19).

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