A cold pressing and forming device for the production of a metal-bonded diamond grinding wheel

Abstract

The present invention discloses a cold pressing and forming device for the production of a metal-bonded diamond grinding wheel in the field of diamond grinding wheel forming technology. A cold pressing and forming assembly is installed on the basic assembly. The output end of the hydraulic telescopic cylinder is fixedly assembled with an upper mold, and a lower mold adapted to the upper mold is fixed on the basic assembly. A flattening assembly is assembled in the lower mold, and a cooling assembly driven by the flattening assembly is installed in the basic assembly. By setting the flattening assembly, the cold pressing and forming disk is set to be rotatable and relatively rotate with the lower mold, which can flatten the raw materials on the cold pressing and forming disk without affecting the use of the lower mold. The cooling assembly is added and the cooling assembly is driven to act when the flattening assembly acts to achieve an effective heat exchange effect, solving the problem that it is difficult to effectively dissipate heat from the overall cold pressing of the grinding wheel. A demoulding assembly is added to complete the automatic mold lifting operation.

Description

Technical Field

[0001] The present invention relates to the technical field of diamond grinding wheel forming, and particularly relates to a cold pressing forming device for producing a metal-bonded diamond grinding wheel. Background Art

[0002] When manufacturing a metal-bonded diamond grinding wheel, it is necessary to press the grinding layer powder raw material onto the grinding wheel base to achieve forming. The existing grinding wheel forming methods are mostly cold pressing methods. The diamond grinding wheel is a circular consolidated grinding tool with a through hole in the center, made of diamond abrasive and using metal powder, resin powder, ceramics, and electroplated metal as binders respectively. However, the current cold pressing forming device has the following problems when in use:

[0003] 1. After adding the grinding layer powder raw material into the lower mold cavity each time, the existing cold pressing forming device needs to be manually leveled. Otherwise, it will seriously affect the stamping quality of the grinding layer. However, the manual leveling operation not only delays time but also is not easy to level evenly.

[0004] 2. During the cold pressing process, as the pressure increases, the temperature of the combined part of the grinding layer powder raw material layer and the grinding wheel base rises, and problems such as sintering deformation are likely to occur, resulting in problems such as cracking and even ring detachment. Currently, a liquid pumping device is used to circulate and transport the coolant for cooling. However, the residence time of the coolant in the coolant flow channel is short, and effective heat exchange cannot be achieved, making it difficult to effectively achieve the overall heat dissipation effect of the grinding wheel cold pressing.

[0005] Therefore, it is very necessary to invent a cold pressing forming device for producing a metal-bonded diamond grinding wheel to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a cold pressing forming device for producing a metal-bonded diamond grinding wheel to solve the problems mentioned in the above background art.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A cold pressing forming device for producing a metal-bonded diamond grinding wheel, including a base component that can provide a support foundation for the device. A cold pressing forming component for pressing the grinding wheel is installed on the base component. The cold pressing forming component includes a hydraulic telescopic cylinder. The output end of the hydraulic telescopic cylinder is fixedly assembled with an upper mold, and a lower mold adapted to the upper mold is fixed on the base component.

[0008] A flattening component is assembled inside the lower mold, and the flattening component includes a driving member fixed to the bottom of the upper mold. A driving gear adapted to the driving member is rotatably connected to the outside of the lower mold. A worm is rotatably connected inside the lower mold and fixedly connected to the driving gear. A worm gear is meshed and assembled on the front side of the worm. An installation shaft is fixedly sleeved inside the worm gear. The top end of the installation shaft extends out of the lower mold and is fixedly installed with a cold pressing and forming disc. An electric coupling is rotatably assembled inside the lower mold through a bearing, and the bottom end of the installation shaft is connected to the electric coupling;

[0009] A cooling component driven by the flattening component is installed inside the base component. The cooling component includes a cold water tank. A lead screw is movably assembled at the bottom of the inner cavity of the cold water tank through a bearing seat. The other end of the lead screw is connected to the electric coupling. A threaded cylinder is sleeved and connected on the lead screw. A sealing movable plate is fixedly sleeved on the outer side wall of the threaded cylinder, and the cold water tank is communicated with the lower mold through a water guide pipe.

[0010] Preferably, the base component includes an outer protection box. Support columns are fixed at the four corners of the top of the outer protection box. The top ends of the four groups of support columns are assembled with a mounting plate. The hydraulic telescopic cylinder is fixed in the middle of the mounting plate. A maintenance door is hingedly assembled on the front side wall of the outer protection box, and a control panel is fixedly assembled on the outer protection box.

[0011] Preferably, the upper mold includes a supporting plate fixedly connected to the output end of the hydraulic telescopic cylinder. Driving motors are fixed on the inner and outer sides of the supporting plate. The output end of the driving motor extends out of the supporting plate and is fixedly connected to the driving member. A pressing disc is integrally formed at the bottom of the supporting plate.

[0012] Preferably, a driving cavity is opened at the bottom inside the lower mold, and an annular heat exchange cavity is opened at the top inside the lower mold. Two liquid electric control valves are fixedly assembled at the bottom of the heat exchange cavity. The water guide pipe is arranged in the driving cavity, and the bottom end of the water guide pipe passes through the outer protection box and is communicated with the cold water tank. The top end of the water guide pipe is connected to the liquid electric control valve.

[0013] Preferably, an annular heat exchange disc is fixed on one side of the heat exchange cavity close to the cold pressing and forming disc. An annular water guide groove is uniformly opened inside the heat exchange disc. The annular water guide groove is spiral and communicated with the heat exchange cavity. An annular turbulence disc is installed on the inner side wall of the heat exchange cavity.

[0014] Preferably, the cooling component further includes a support rod for fixing the cold water tank on the inner side wall of the outer protection box. A water inlet pipe extending out of the outer protection box is communicated with the top of the right side wall of the cold water tank. An air guide pipe extending out of the outer protection box is communicated with the bottom of the left side wall of the cold water tank, and the air guide pipe is arranged below the sealing movable plate. A solenoid valve is fixedly assembled at the end of the air guide pipe.

[0015] Preferably, the driving member includes a connecting rod connected to a driving motor, and a driving rack is fixedly connected to the bottom end of the connecting rod, which facilitates the driving rack to drive the driving gear to rotate.

[0016] Preferably, the upper mold, the lower mold and the cold pressing and forming disk are exactly corresponding. A receiving groove is formed at the top of the lower mold, the cold pressing and forming disk is rotationally assembled in the receiving groove, a demolding assembly is fixedly arranged in the middle of the top of the cold pressing and forming disk, and an annular channel is formed between the demolding assembly and the lower mold.

[0017] Preferably, the demolding assembly is adapted to the size of the pressing disk. The demolding assembly includes an outer cylinder fixed in the middle of the top of the cold pressing and forming disk. A pressure-bearing ring is slidably installed at the top of the outer cylinder. A return spring is installed between the outer edge of the pressure-bearing ring and the inner side wall of the outer cylinder. Two groups of pressure-bearing air bags are installed between the inner side wall of the pressure-bearing ring and the inner side wall of the outer cylinder. Air blowing holes are uniformly arranged on the right side of the surface of the cold pressing and forming disk, and an air collecting hood corresponding to the air blowing holes is fixed in the inner cavity of the cold pressing and forming disk. An air control valve is fixedly assembled at the end of the air collecting hood. Both groups of pressure-bearing air bags are communicated with a high-pressure air pipe connected to the air control valve. The left pressure-bearing air bag is communicated with a turbulent flow air pipe. The other end of the turbulent flow air pipe passes downward through the cold pressing and forming disk and is communicated with a turbulent flow disk. A check valve is installed on the turbulent flow air pipe.

[0018] Preferably, a pressure sensor is fixedly assembled in the middle of the top of the pressure-bearing ring, and the control panel is electrically connected to the driving motor, the liquid control valve, the pressure sensor, the air control valve, the solenoid valve and the electric coupling.

[0019] The technical effects and advantages of the present invention are as follows:

[0020] 1. The present invention is provided with a flattening assembly. The cold pressing and forming disk is arranged to be rotatable and rotates relative to the lower mold, which can promote the flattening operation of the raw materials on the cold pressing and forming disk without affecting the use of the lower mold. That is, when the hydraulic telescopic cylinder is started through the control panel, the upper mold is driven to move downward by the hydraulic telescopic cylinder, and the driving member can be synchronously driven to move. The driving member drives the meshing driving gear to rotate, so that the driving gear drives the worm to rotate. The worm and the worm wheel assembled in a meshing manner can drive the cold pressing and forming disk at the top of the worm wheel to rotate. Since the cold pressing and forming disk is rotationally arranged, in order to prevent the raw materials from flowing out of the gap between the receiving groove and the cold pressing and forming disk during the rotation of the cold pressing and forming disk, the top of the cold pressing and forming disk needs to be fitted to the inner top of the receiving groove, and a sealing ring is assembled on the inner top of the receiving groove to prevent the leakage of the abrasive layer raw materials. Through such a setting, the problem that the manual flattening operation before pressing not only wastes time but also is not easy to flatten evenly can be effectively solved.

[0021] 2. The present invention adds a cooling component, which is driven by the action of the flattening component to make the cooling component act. After the hydraulic telescopic cylinder works, two groups of liquid electric control valves and solenoid valves are started through the control panel. At the same time, the electric coupling is started through the control panel, which can complete the linkage connection between the installation shaft and the optical rod. At the same time, the water inlet pipe is closed. In this way, when the worm drives the cold pressing forming disc at the top of the worm gear to rotate during operation, the installation shaft on the worm gear will drive the lead screw to rotate through the electric coupling, and the lead screw can drive the threaded cylinder and the sealing movable plate to move upward. In this way, the water in the cold water tank can be driven to flow into the heat exchange cavity through the water guide pipe and the liquid electric control valve to realize the overall wrapping of the water body in the lower mold around the grinding wheel, which is convenient for heat exchange with the cold-pressed grinding wheel. Through the combined heat exchange effect inside and outside, the heat exchange efficiency is improved, and the cooling water stays in the coolant flow channel for a longer time, realizing an effective heat exchange effect, and solving the problem that it is currently difficult to effectively dissipate the heat of the whole cold pressing of the grinding wheel.

[0022] 3. The present invention adds a demolding component, which can make the upper mold continuously press the demolding component and also continuously press the grinding wheel on the cold pressing forming disc. Using the completion of the downward cold pressing action as the action control signal for the demolding component, the integrity is strong. When the gas electric control valve is opened, the gas in the high-pressure air pipe will quickly blow out from the air outlet holes through the air collecting cover, realizing the blowing on the surface of the cold pressing forming disc, which can generate an upward impact force on the formed grinding wheel and complete the automatic mold lifting operation, solving the technical defect that the traditional manual demolding method is prone to damage the formed grinding wheel during demolding, resulting in an increase in production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a schematic diagram of the assembly structure of the cold pressing forming component and the cooling component of the present invention;

[0025] Figure 3 is a schematic diagram of the partial sectional structure of the present invention;

[0026] Figure 4 is a schematic diagram of the sectional structure of the cooling component of the present invention;

[0027] Figure 5 is a schematic diagram of the assembly sectional structure of the upper mold and the lower mold of the present invention;

[0028] Figure 6 is a schematic diagram of the sectional structure of the heat exchange disc of the present invention;

[0029] Figure 7 is a schematic diagram of the assembly structure of the demolding component and the cold pressing forming disc of the present invention;

[0030] Figure 8Schematic diagram of the driving component of the present invention.

[0031] In the figure: Basic components: 11. Outer protection box; 12. Support column; 13. Mounting plate; 14. Maintenance door; 15. Control panel;

[0032] Cold pressing and forming components: 21. Hydraulic telescopic cylinder; 22. Upper mold; 221. Support plate; 222. Pressing disc; 223. Driving motor; 23. Lower mold; 231. Driving cavity; 232. Heat exchange cavity; 233. Accommodating groove; 234. Liquid electric control valve; 235. Water guide pipe; 236. Heat exchange disc; 237. Annular water guide groove; 238. Turbulence disc;

[0033] Flattening components: 31. Driving part; 311. Connecting rod; 312. Driving rack; 32. Driving gear; 33. Worm; 34. Worm gear; 35. Electric coupling; 36. Cold pressing and forming disc;

[0034] Cooling components: 41. Cold water tank; 42. Support rod; 43. Lead screw; 44. Sealed movable plate; 45. Threaded barrel; 46. Water inlet pipe; 47. Air guide pipe;

[0035] Demolding components: 51. Outer cylinder; 52. Bearing ring; 53. Return spring; 54. Bearing airbag; 55. Pressure sensor; 56. High-pressure air pipe; 57. Gas electric control valve; 58. Air collecting hood; 59. Air blowing hole; 510. Turbulence air pipe; 511. Gas one-way valve. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] First embodiment

[0038] The present invention provides a cold pressing and forming device for producing a metal-bonded diamond grinding wheel as shown in Figures 1 to 8 , which includes a basic component that can provide a support foundation for the device. The basic component includes an outer protection box 11. Support columns 12 are fixed at the four corners of the top of the outer protection box 11. A mounting plate 13 is assembled at the top ends of the four groups of support columns 12. A hydraulic telescopic cylinder 21 is fixed in the middle of the mounting plate 13. A maintenance door 14 is hingedly assembled on the front side wall of the outer protection box 11, and a control panel 15 is fixedly assembled on the outer protection box 11;

[0039] Moreover, a cold pressing and forming assembly for pressing the grinding wheel is installed on the base component. The cold pressing and forming assembly includes a hydraulic telescopic cylinder 21. The output end of the hydraulic telescopic cylinder 21 is fixedly assembled with an upper die 22. A lower die 23 adapted to the upper die 22 is fixed on the base component. During use, the extension of the hydraulic telescopic cylinder 21 can drive the upper die 22 to move downward, and the cold pressing and forming of the grinding wheel can be completed through the insertion fit of the upper die 22 and the lower die 23. Moreover, the hydraulic telescopic cylinder 21 is connected to an external oil pump through a high-pressure oil pipe;

[0040] However, during use, the inventor found that: after adding the grinding layer powder raw material into the lower die 23 each time in the existing cold pressing and forming device, it is necessary to manually level these raw materials. If the leveling operation is not carried out, it will seriously affect the stamping quality of the grinding layer after the die is pressed, resulting in uneven thickness. Due to the manual leveling operation, not only does it waste time, but it is also not easy to level evenly. Based on this, the inventor proposed the following improvement scheme:

[0041] As Figure 2 and Figure 3 shown, a leveling assembly is assembled in the lower die 23. The leveling assembly includes a driving part 31 fixed to the bottom of the upper die 22. A driving gear 32 adapted to the driving part 31 is rotatably connected to the outside of the lower die 23. A worm 33 fixedly connected to the driving gear 32 is rotatably connected in the lower die 23. A worm gear 34 is meshed and assembled on the front side of the worm 33. A mounting shaft is fixedly sleeved inside the worm gear 34. The top end of the mounting shaft extends out of the lower die 23 and is fixedly installed with a cold pressing and forming disc 36. Moreover, the upper die 22, the lower die 23 and the cold pressing and forming disc 36 are exactly corresponding. A receiving groove 233 is formed at the top of the lower die 23. The cold pressing and forming disc 36 is rotatably assembled in the receiving groove 233. An electric coupling 35 is rotatably assembled in the lower die 23 through a bearing. The bottom end of the mounting shaft is connected to the electric coupling 35.

[0042] Based on this, during use, it is necessary to manually pour the grinding layer raw material into the lower mold 23, so that the grinding layer raw material will directly accumulate on the cold pressing forming plate 36. Since this solution sets the cold pressing forming plate 36 to be rotatable and generates relative rotation with the lower mold 23, it can flatten the raw material on the cold pressing forming plate 36 without affecting the use of the lower mold 23. That is, when starting the hydraulic telescopic cylinder 21 through the control panel 15, the hydraulic telescopic cylinder 21 can drive the driving member 31 to move synchronously during the downward movement of the upper mold 22. The driving member 31 drives the meshing driving gear 32 to rotate, thereby driving the driving gear 32 to drive the worm 33 to rotate. Through the meshing assembly of the worm wheel 34 and the worm 33, the cold pressing forming plate 36 at the top of the worm wheel 34 can be driven to rotate. Since the cold pressing forming plate 36 is rotatably arranged, in order to prevent the raw material from flowing out of the gap between the receiving groove 233 and the cold pressing forming plate 36 during the rotation of the cold pressing forming plate 36, the top of the cold pressing forming plate 36 needs to be fitted and assembled on the inner top of the receiving groove 233. At the same time, a sealing ring is assembled on the inner top of the receiving groove 233 to prevent the leakage of the grinding layer raw material. Through such a setting, the problem of manual flattening operation before pressing, which not only delays time but also is not easy to flatten evenly, can be effectively solved.

[0043] In addition, the inventor found that during the cold pressing process of the device, as the pressure increases, the temperature at the joint between the grinding layer powder raw material layer and the grinding wheel base increases, which is likely to cause problems such as sintering deformation, resulting in cracking or even ring detachment at the bonding place. Currently, the method adopted is to select an external liquid extraction pump to cool by circulating and transporting the coolant. However, since the power of the liquid extraction pump is constant and it is in a continuous working state, the residence time of the coolant in the coolant flow channel is short, and effective heat exchange cannot be achieved, making it difficult to effectively dissipate the heat of the overall cold pressing of the grinding wheel. To overcome the above problems, the inventor proposed the following improvement plan based on the above technical solutions:

[0044] As Figures 2 - 6 shown, on the premise of ensuring the normal operation of the above technical solutions, a cooling component driven by the flattening component is installed in the basic component. That is, the cooling component includes a cold water tank 41, and a lead screw 43 is movably assembled at the bottom of the inner cavity of the cold water tank 41 through a bearing seat. The other end of the lead screw 43 is connected to the electric coupling 35.

[0045] It should be noted that the length of the lead screw 43 is the same as the height of the inner cavity of the cold water tank 41. At the same time, a polished rod is integrally formed at the top of the lead screw 43, and the polished rod passes upward through the outer protection box 11 and the lower mold 23 and is connected to the electric coupling 35. A threaded cylinder 45 is sleeved and connected on the lead screw 43, and a sealed movable plate 44 is fixedly sleeved on the outer side wall of the threaded cylinder 45.

[0046] In addition, the size of the sealing movable plate 44 is adapted to the inner cavity size of the cold water tank 41, and a sealing rubber sleeve is wrapped and assembled on the outer side wall of the sealing movable plate 44, which can improve the sealing performance of the sealing movable plate 44.

[0047] The cold water tank 41 is connected to the lower mold 23 through a water guide pipe 235. A driving cavity 231 is opened at the inner bottom of the lower mold 23, and an annular heat exchange cavity 232 is opened at the inner top of the lower mold 23. Two groups of liquid electromagnetic valves 234 are fixedly assembled at the bottom of the heat exchange cavity 232. The water guide pipe 235 is arranged in the driving cavity 231, and the bottom end of the water guide pipe 235 passes through the outer protection box 11 and is connected to the cold water tank 41, and the top end of the water guide pipe 235 is connected to the liquid electromagnetic valve 234.

[0048] Based on this, when the device is in use, there is no need to add an external drive. The cooling component is driven by the action of the flattening component. After the hydraulic telescopic cylinder 21 works, two groups of liquid electromagnetic valves 234 and electromagnetic valves are started through the control panel 15. At the same time, the electric coupling 25 is started through the control panel 15, which can complete the linkage connection between the installation shaft and the optical rod. At the same time, the water inlet pipe 46 is closed. In this way, when the worm 33 drives the cold pressing forming disc 36 at the top of the worm gear 34 to rotate during work, the installation shaft on the worm gear 34 will drive the lead screw 43 to rotate through the electric coupling 35. The lead screw 43 can drive the threaded cylinder 45 and the sealing movable plate 44 to move upward, so that the water in the cold water tank 41 can flow into the heat exchange cavity 232 through the water guide pipe 235 and the liquid electromagnetic valve 234, realizing the overall wrapping of the grinding wheel by the water body in the lower mold 23, which is convenient for heat exchange with the cold-pressed grinding wheel. As the sealing movable plate 44 moves upward, more cooling water is introduced into the heat exchange cavity 232. At the same time, air can be input into the inner bottom of the cold water tank 41 through the air guide pipe 47 when the electromagnetic valve is opened, so as to ensure that the upper and lower pressures of the sealing movable plate 44 are consistent and ensure the smooth discharge of the cooling water.

[0049] Furthermore, in order to improve the heat exchange effect, an annular heat exchange disc 236 is fixed on one side of the heat exchange cavity 232 close to the cold pressing forming disc 36, and annular water guide grooves 237 are uniformly opened in the heat exchange disc 236. The annular water guide grooves 237 are spiral and communicate with the heat exchange cavity 232. In this way, the heat exchange speed between the heat exchange disc 236 and the cold pressing forming disc 36 is greatly increased through the heat exchange disc 236. The cold water can flow into the annular water guide grooves 237 while covering the heat exchange disc 236. Through the combined heat exchange effect inside and outside, the heat exchange efficiency is improved, the residence time of the cooling water in the coolant flow channel is prolonged, and an effective heat exchange effect is achieved, solving the problem that it is difficult to effectively dissipate the heat of the whole cold pressing of the grinding wheel at present.

[0050] Meanwhile, the upper die 22 includes a supporting plate 221 fixedly connected to the output end of the hydraulic telescopic cylinder 21. Driving motors 223 are fixedly arranged on the inner and outer sides of the supporting plate 221. The output end of the driving motor 223 extends out of the supporting plate 221 and is fixedly connected to the driving member 31. A pressing disc 222 is integrally formed at the bottom of the supporting plate 221, which can ensure that the pressing between the upper die 22 and the lower die 23 completes the cold pressing forming operation. The driving member 31 includes a connecting rod 311 connected to the driving motor 223, and a driving rack 312 is fixedly connected to the bottom end of the connecting rod 311. During use, when the lead screw 43 drives the sealing movable plate 44 to move to the topmost position, at this time, the driving rack 312 disengages from the driving gear 32. Thus, while the flattening operation is completed, the cooling water supply action of the cooling component also ends, effectively avoiding the situation of movement interference. Subsequently, when the hydraulic telescopic cylinder 21 drives the upper die 22 to continuously press down, it will not cause the linkage of the flattening component and the cooling component, improving the safety of the device during use.

[0051] It should be noted that the cooling component further includes a support rod 42 for fixing the cold water tank 41 on the inner side wall of the outer protection box 11. A water inlet pipe 46 extending out of the outer protection box 11 is communicated with the top of the right side wall of the cold water tank 41, and cooling water can be introduced into the cold water tank 41 through the water inlet pipe 46. A gas guide pipe 47 extending out of the outer protection box 11 is communicated with the bottom of the left side wall of the cold water tank 41, and the gas guide pipe 47 is arranged below the sealing movable plate 44. An electromagnetic valve is fixedly assembled at the end of the gas guide pipe 47. Air can be input into the cold water tank 41 through the gas guide pipe 47 when the electromagnetic valve is opened to ensure that the upper and lower pressures of the sealing movable plate 44 are consistent, and at the same time ensure the smooth discharge of the cooling water.

[0052] Second Embodiment

[0053] However, during the cold pressing process, the inventor found that the downward punching force of the lower die 23 would cause the grinding wheel base to adhere to the cold pressing forming disc 36. This makes it impossible to realize the automatic demoulding of the forming die and the grinding wheel after the cold pressing die is formed. The traditional manual demoulding method is likely to damage the formed grinding wheel during demoulding, resulting in an increase in production costs. In order to overcome the defect that automatic demoulding cannot be achieved after cold pressing, the inventor proposed the following improvement plan based on the above technical solution:

[0054] Such as Figure 3 And Figure 7As shown, a demolding assembly is fixedly arranged in the middle of the top of the cold pressing forming disc 36, and an annular channel is formed between the demolding assembly and the lower mold 23 to fit the insertion of the pressing disc 222, facilitating the grinding layer raw material to directly accumulate on the cold pressing forming disc 36. The demolding assembly and the pressing disc 222 are of matching sizes. The demolding assembly includes an outer cylinder 51 fixedly arranged in the middle of the top of the cold pressing forming disc 36. A pressure-bearing ring 52 is slidably installed at the top of the outer cylinder 51. A return spring 53 is installed between the outer edge of the pressure-bearing ring 52 and the inner side wall of the outer cylinder 51. Two groups of pressure-bearing air bags 54 are installed between the inner side wall of the pressure-bearing ring 52 and the inner side wall of the outer cylinder 51. Air blowing holes 59 are evenly arranged on the right side of the surface of the cold pressing forming disc 36, and an air collecting cover 58 corresponding to the air blowing holes 59 is fixed in the inner cavity of the cold pressing forming disc 36. An air control valve 57 is fixedly assembled at the end of the air collecting cover 58. Both groups of pressure-bearing air bags 54 are communicated with a high-pressure air pipe 56 connected to the air control valve 57. A ring-shaped turbulence disc 238 is installed on the inner side wall of the heat exchange cavity 232. The left side of the left pressure-bearing air bag 54 is communicated with a turbulence air pipe 510. The other end of the turbulence air pipe 510 passes downward through the cold pressing forming disc 36 and is communicated with the turbulence disc 238. A gas one-way valve 211 is installed on the turbulence air pipe 510. A pressure sensor 55 is fixedly assembled in the middle of the top of the pressure-bearing ring 52. The control panel 15 is electrically connected to the drive motor 223, the liquid control valve 234, the pressure sensor 55, the air control valve 57, the electromagnetic valve, and the electric coupling 35.

[0055] In this way, when the hydraulic telescopic cylinder 21 extends outward, it can drive the upper die 22 to move downward. Through the insertion fit between the upper die 22 and the lower die 23, as the upper die 22 moves downward, the supporting plate 221 first contacts the pressure-bearing ring 52. At this time, the pressure sensor 55 starts to work and can detect the pressure value of the supporting plate 221 on the pressure-bearing ring 52. At the same time, the control panel 15 activates the gas solenoid valve 57, causing the pressure-bearing ring 52 to contract into the outer cylinder 51. At this time, the reset spring 53 is compressed, and at the same time, the two pressure-bearing air bags 54 are also compressed synchronously. This can prompt the gas in the right pressure-bearing air bag 54 to flow through the high-pressure air pipe 56 to the gas solenoid valve 57. During this process, the cold pressing and forming disk 36 has started to rotate, and the self-leveling operation of the grinding layer raw material is realized by the rotation of the cold pressing and forming disk 36. At the same time, the pressing disk 222 on the upper die 22 will contact the raw material, playing an auxiliary role in leveling and accelerating the raw material leveling operation. After the driving rack 312 and the driving gear 32 are disengaged, the leveling operation is completed, and at the same time, the cooling water supply action of the cooling component ends. The upper die 22 continues to move downward slowly, continuously pressing the demolding component and continuously pressing the grinding wheel on the cold pressing and forming disk 36. During this process, the pressure on the gas solenoid valve 57 from the high-pressure air pipe 56 is also increasing. When the upper die 22 moves to the lowest end, the pressure value detected by the pressure sensor 55 is the largest. At this time, the control panel 15 has a built-in timing unit, which starts timing when the pressure value detected by the pressure sensor 55 does not change. This time period T is the time for the grinding wheel to be pressed and formed. The cold pressing and forming of the grinding wheel is completed within this time period. When the time ends, it serves as the action signal for the hydraulic telescopic cylinder 21, the driving motor 223, the liquid solenoid valve 234, the gas solenoid valve 57, the solenoid valve, and the electric coupling 35. The hydraulic telescopic cylinder 21 drives the upper die 22 to move upward and reset, and the gas solenoid valve 57 is opened. At this time, the gas in the high-pressure air pipe 56 will quickly blow out from the air outlet hole 59 through the air collecting hood 58, realizing the surface blowing of the cold pressing and forming disk 36, which can generate an upward impact force on the formed grinding wheel and complete the automatic mold removal operation, solving the technical defect that the current traditional manual mold removal method is likely to damage the formed grinding wheel during mold removal, resulting in an increase in production costs.

[0056] When the hydraulic telescopic cylinder 21 extends and drives the upper die 22 to move downward, the left pressure-bearing airbag 54 is compressed synchronously. At this time, gas is introduced into the turbulence disk 238 through the turbulence air pipe 511 and then ejected, which can impact the cooling water in the heat exchange cavity 232 to achieve a turbulence effect, facilitating the flow of the cooling water and providing convenience for better cooling of the cooling water. Moreover, exhaust holes are provided at the top of the lower die 23, and the excess gas will be discharged from the exhaust holes. Since a gas check valve 512 is installed on the turbulence air pipe 511, the water in the heat exchange cavity 232 will not flow back into the left pressure-bearing airbag 54. Therefore, during the cold pressing process, while extruding the demolding assembly, it can act on the cooling assembly through the demolding assembly, further improving the cooling speed of the formed grinding wheel.

[0057] It should be noted that the aperture of the air blowing hole 59 is smaller than the particle size of the grinding layer raw material, which can prevent the raw material particles from entering the air blowing hole 59 and blocking the air blowing hole 59, ensuring the smoothness of the air blowing hole 59.

[0058] During the reset process of the upper die 22, the driving motor 223 drives the driving member 31 to rotate 180 degrees to prevent the driving member 31 and the driving gear 32 from engaging and contacting, thus avoiding motion interference. At the same time, the electric coupling 35 acts to release the clamping restriction on the polished rod of the lead screw 43, and the liquid electric control valve 234 remains open. It should be noted that a small water pump can be installed in the heat exchange cavity 232 for standby, which can provide power for the circulating flow of the cooling water, facilitating the cooling water in the heat exchange cavity 232 to flow back into the cold water tank 41 through the water guide pipe 235. As the water volume increases, it prompts the sealed movable plate 44 to move downward. Since there is no additional restriction on the lead screw 43, the lead screw 43 can be driven to rotate by the gravity of the sealed movable plate 44 plus the water body, which facilitates the downward movement of the sealed movable plate 44 to achieve reset. At the same time, the solenoid valve opens, and the air below the sealed movable plate 44 can be discharged through the air guide pipe 47.

[0059] Moreover, as the pressure of the upper die 22 on the demolding assembly becomes smaller and smaller, the resilience of the reset spring 53 is utilized to prompt the pressure-bearing ring 52 to reset. At the same time, the outside air can flow back into the pressure-bearing airbag 54 through the air blowing hole 59, the gas electric control valve 57, and the high-pressure air pipe 56, which can prompt the two pressure-bearing airbags 54 to bulge and complete the reset. In this way, the whole device returns to the initial working state, facilitating the cold pressing operation of the next group of grinding wheels.

[0060] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cold pressing and forming device for the production of a metal-bonded diamond grinding wheel, characterized in that, It includes a base component capable of providing a support foundation for the device, and a cold pressing and forming component formed by pressing a grinding wheel is installed on the base component. The cold pressing and forming component includes a hydraulic telescopic cylinder (21), and an upper die (22) is fixedly assembled at the output end of the hydraulic telescopic cylinder (21). A lower die (23) adapted to the upper die (22) is fixed on the base component; A flattening component is assembled in the lower die (23), and the flattening component includes a driving member (31) fixed to the bottom of the upper die (22). A driving gear (32) adapted to the driving member (31) is rotatably connected to the outside of the lower die (23). A worm (33) fixedly connected to the driving gear (32) is rotatably connected in the lower die (23). A worm gear (34) is meshed and assembled on the front side of the worm (33). A mounting shaft is fixedly sleeved inside the worm gear (34). The top end of the mounting shaft extends out of the lower die (23) and is fixedly installed with a cold pressing and forming disc (36). The lower die (23) is rotatably assembled with an electric coupling (35) through a bearing, and the bottom end of the mounting shaft is connected to the electric coupling (35); A cooling component driven by the flattening component is installed in the base component. The cooling component includes a cold water tank (41). A lead screw (43) is movably assembled at the bottom of the inner cavity of the cold water tank (41) through a bearing seat. The other end of the lead screw (43) is connected to the electric coupling (35). A threaded cylinder (45) is sleeved and connected on the lead screw (43). A sealing movable plate (44) is fixedly sleeved on the outer side wall of the threaded cylinder (45). And the cold water tank (41) is communicated with the lower die (23) through a water guide pipe (235); The base component includes an outer protection box (11). Support columns (12) are fixed at the four corners of the top of the outer protection box (11). An installation plate (13) is assembled at the top ends of the four groups of support columns (12). The hydraulic telescopic cylinder (21) is fixed in the middle of the installation plate (13). A maintenance door (14) is hingedly assembled on the front side wall of the outer protection box (11), and a control panel (15) is fixedly assembled on the outer protection box (11); The upper die (22) includes a supporting plate (221) fixedly connected to the output end of the hydraulic telescopic cylinder (21). Driving motors (223) are fixed on the inner and outer sides of the supporting plate (221). The output ends of the driving motors (223) extend out of the supporting plate (221) and are fixedly connected to the driving member (31). A pressing disc (222) is integrally formed at the bottom of the supporting plate (221); A driving cavity (231) is formed at the bottom inside the lower die (23), and an annular heat exchange cavity (232) is formed at the top inside the lower die (23). Two liquid electric control valves (234) are fixedly assembled at the bottom of the heat exchange cavity (232). The water guide pipe (235) is arranged in the driving cavity (231), and the bottom end of the water guide pipe (235) passes through the outer protection box (11) and is communicated with the cold water tank (41). The top end of the water guide pipe (235) is connected to the liquid electric control valve (234); One side of the heat exchange cavity (232) close to the cold pressing and forming disc (36) is fixed with an annular heat exchange disc (236). The heat exchange disc (236) is evenly provided with an annular water guide groove (237) inside. The annular water guide groove (237) is spiral and communicated with the heat exchange cavity (232). An annular turbulence disc (238) is installed on the inner side wall of the heat exchange cavity (232).

2. The cold pressing and forming device for producing a metal-bonded diamond grinding wheel according to claim 1, wherein: The cooling assembly further includes a support rod (42) for fixing the cold water tank (41) on the inner side wall of the outer protection box (11). The top of the right side wall of the cold water tank (41) is communicated with a water inlet pipe (46) extending out of the outer protection box (11). The bottom of the left side wall of the cold water tank (41) is communicated with an air guide pipe (47) extending out of the outer protection box (11). The air guide pipe (47) is arranged below the sealing movable plate (44). The end of the air guide pipe (47) is fixedly equipped with a solenoid valve.

3. The cold pressing and forming device for producing a metal-bonded diamond grinding wheel according to claim 1, wherein: The driving member (31) includes a connecting rod (311) connected to the driving motor (223). The bottom end of the connecting rod (311) is fixedly connected with a driving rack (312).

4. A cold pressing and forming device for producing a metal-bonded diamond grinding wheel according to claim 2, characterized in that: The upper mold (22), the lower mold (23) and the cold pressing and forming disc (36) are exactly corresponding. A receiving groove (233) is formed at the top of the lower mold (23). The cold pressing and forming disc (36) is rotationally assembled in the receiving groove (233). A demolding assembly is fixedly arranged in the middle of the top of the cold pressing and forming disc (36). An annular channel is formed between the demolding assembly and the lower mold (23).

5. The cold pressing and forming device for producing a metal-bonded diamond grinding wheel according to claim 4, wherein: The demolding assembly is adapted to the size of the pressing disc (222). The demolding assembly includes an outer cylinder (51) fixedly arranged in the middle of the top of the cold pressing and forming disc (36). A pressure bearing ring (52) is slidably installed at the top of the outer cylinder (51). A return spring (53) is installed between the outer edge of the pressure bearing ring (52) and the inner side wall of the outer cylinder (51). Two groups of pressure bearing air bags (54) are installed between the inner side wall of the pressure bearing ring (52) and the inner side wall of the outer cylinder (51). Air blowing holes (59) are evenly arranged on the right side surface of the cold pressing and forming disc (36). An air collecting cover (58) corresponding to the air blowing holes (59) is fixed in the inner cavity of the cold pressing and forming disc (36). The end of the air collecting cover (58) is fixedly equipped with a gas electric control valve (57). Both groups of pressure bearing air bags (54) are communicated with a high-pressure air pipe (56) connected to the gas electric control valve (57). The left side of the left pressure bearing air bag (54) is communicated with a turbulence air pipe (510). The other end of the turbulence air pipe (510) passes through the cold pressing and forming disc (36) downward and is communicated with the turbulence disc (238). A gas one-way valve (211) is installed on the turbulence air pipe (510).

6. The cold pressing and forming device for producing a metal-bonded diamond grinding wheel according to claim 5, wherein: A pressure sensor (55) is fixedly installed in the middle of the top of the pressure bearing ring (52). The control panel (15) is electrically connected to the driving motor (223), the liquid electric control valve (234), the pressure sensor (55), the gas electric control valve (57), the solenoid valve, and the electric coupling (35).

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