Composite polycrystalline boron nitride (CBN) grinding wheel mold

Abstract

The utility model relates to a composite polycrystalline boron nitride (CBN) grinding wheel die, which effectively solves the problems that the existing CBN grinding wheel pressing die has some defects in design and structure, and the flowability and the filling property of materials in the pressing process are not fully considered in the design of part of dies. The problems that the internal structure of a pressed grinding wheel blank is not uniform, the overall performance of the grinding wheel is affected, meanwhile, the demolding mode of a mold is not convenient and efficient enough, the grinding wheel blank is prone to being damaged in the demolding process, and the product percent of pass is further reduced are solved. According to the composite type polycrystalline boron nitride CBN grinding wheel die, through the matched arrangement of the female die and the guide base, a forming space can be provided for a grinding wheel base body in the grinding wheel forming process, then the female die is matched with the male die, the grinding wheel is pressed and formed, and the female die can slide relative to the guide base after forming is completed; therefore, the formed grinding wheel is separated from the female die.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the abrasive wheel manufacturing technical field, concretely relates to a kind of composite polycrystalline boron nitride CBN abrasive wheel mould. BACKGROUND

[0002] Composite polycrystalline boron nitride abrasive wheel occupies a crucial position in grinding processing in many fields such as mechanical processing, automobile manufacturing, aerospace, etc., becomes the key abrasive for processing various difficult-to-machine materials, and has excellent performances such as high hardness, high wear resistance, good thermal stability and chemical inertness, however, there are still many problems to be solved in the production and manufacturing process of composite polycrystalline boron nitride CBN abrasive wheel, especially in the compaction forming process.

[0003] In the process of making CBN abrasive wheel, compaction forming is a very critical link, CBN abrasive, binder and other auxiliary materials need to be formed into abrasive blank with certain strength and shape in the mold through compaction, but the existing CBN abrasive compaction mold also has some defects in design and structure, the design of part of the mold does not fully consider the flowability and filling property of materials in the compaction process, which leads to uneven internal structure of the compacted abrasive blank, affects the overall performance of the abrasive wheel, at the same time, the demolding mode of the mold is not convenient and efficient, which is easy to cause damage to the abrasive blank during demolding, further reduces the product qualification rate. UTILITY MODEL CONTENTS

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a kind of composite polycrystalline boron nitride CBN abrasive wheel mould, the composite polycrystalline boron nitride CBN abrasive wheel mould can utilize the sliding of female die and the reverse movement of abrasive wheel matrix after the compaction forming of abrasive wheel is completed, and then better demolding operation is carried out on abrasive wheel, to reduce the damage.

[0005] A kind of composite polycrystalline boron nitride CBN abrasive wheel mould, including bottom plate, the middle part of the top of bottom plate is fixedly connected with guide seat, the middle part of the bottom of bottom plate is rotatably connected with positioning rod, the top of guide seat is detachably connected with abrasive wheel matrix, the one end of positioning rod is threadedly connected with pressing block, the outer surface of pressing block is fixedly connected with flow guide ring, the outer surface of guide seat is slidably connected with female die, the outer surface of female die is detachably connected with support ring, the top of support ring is provided with collecting groove, the inner wall of female die is slidably connected with male die.

[0006] Preferably, a plurality of first hydraulic rods are fixedly installed on the top of the bottom plate, and the output ends of the plurality of first hydraulic rods are fixedly connected with the bottom of the female die.

[0007] Preferably, mounting grooves are arranged on both sides of the top of the guide seat, and second hydraulic rods are fixedly installed on the inner bottom walls of the mounting grooves.

[0008] Preferably, the bottom of the pressing block is clamped with the top of the grinding wheel base.

[0009] Preferably, a limiting block is fixedly connected to the outer surface of the female die, and the top of the limiting block is overlapped with the bottom of the supporting ring.

[0010] Preferably, a fixing seat is fixedly connected to the outer surface of the female die and the male die, and a gasket is fixedly connected to the outer surface of the fixing seat.

[0011] The above technical scheme has the beneficial effects of:

[0012] (1) The composite polycrystalline boron nitride CBN grinding wheel mold is provided with a female die and a guide seat, which can provide a molding space for a grinding wheel base during grinding wheel molding, and then cooperates with a male die to press and mold the grinding wheel, and the female die can slide relative to the guide seat after molding, so that the molded grinding wheel is separated from the female die, and the grinding wheel base is moved upward from the top of the guide seat, thereby better realizing demolding operation.

[0013] (2) The composite polycrystalline boron nitride CBN grinding wheel mold is provided with a flow guide ring, which can guide the materials used in the grinding wheel preparation process, reduce material loss, and make it more convenient for the staff to add materials. When excess material appears during the pressing process, it can also directly fall into the collecting groove of the supporting ring, thereby recycling the excess material. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a whole installation structure schematic view of the utility model;

[0015] Fig. 2 It is a male die installation structure schematic view of the utility model;

[0016] Fig. 3 It is a guide seat explosion structure schematic view of the utility model;

[0017] Fig. 4 It is a flow guide ring installation schematic view of the utility model;

[0018] Fig. 5 It is a pressing block bottom structure schematic view of the utility model.

[0019] In the figure: 1, bottom plate; 2, first hydraulic rod; 3, guide seat; 4, mounting groove; 5, second hydraulic rod; 6, positioning rod; 7, grinding wheel base body; 8, pressing block; 9, flow guide ring; 10, concave die; 11, limiting block; 12, support ring; 13, collection groove; 14, convex die; 15, fixed seat. DETAILED DESCRIPTION

[0020] The foregoing and other technical contents, features and effects of the present application are described below in conjunction with the accompanying drawings. Figs. 1 to 5 The embodiment is described in detail.

[0021] The embodiment provides a composite polycrystalline boron nitride CBN grinding wheel mold, as shown in the drawing, which comprises a bottom plate 1, a plurality of first hydraulic rods 2 are fixedly installed on the top of the bottom plate 1, the output ends of the plurality of first hydraulic rods 2 are fixedly connected with the bottom of a concave die 10, a guide seat 3 is fixedly connected to the middle of the top of the bottom plate 1, mounting grooves 4 are formed on both sides of the top of the guide seat 3, second hydraulic rods 5 are fixedly installed on the inner bottom wall of the mounting grooves 4, the bottom plate 1 provides a stable support foundation for the entire mold, ensures that the mold will not shake or displace during the working process, guarantees the stability and precision of the grinding wheel pressing forming process, carries the guide seat 3, the first hydraulic rod 2 and other components, so that the components can be installed in order and work cooperatively, the guide seat 3 provides installation and positioning for the grinding wheel base body 7, ensures the position accuracy of the grinding wheel base body 7 during the pressing forming process, guarantees the precision of the grinding wheel forming, at the same time, cooperates with the concave die 10 to provide a guiding effect for the sliding of the concave die 10, so that the concave die 10 can smoothly slide along the outer surface of the guide seat 3, facilitating demolding operation, the internal structure of the guide seat 3 can cooperate with the positioning rod 6, so that the positioning rod 6 can accurately pass through and be connected with the pressing block 8, thereby realizing positioning and supporting of the pressing block 8, the first hydraulic rod 2 is fixedly installed on the top of the bottom plate 1, and the output end thereof is fixedly connected with the bottom of the concave die 10, which can provide power for the sliding of the concave die 10, so that the concave die 10 can smoothly slide up and down on the outer surface of the guide seat 3, realizing demolding operation, through the hydraulic driving mode, the moving speed and position of the concave die 10 are accurately controlled, the efficiency and accuracy of the demolding operation are improved, and the damage to the grinding wheel blank is reduced, the mounting grooves 4 on both sides of the top of the guide seat 3 provide installation space for the second hydraulic rods 5, the second hydraulic rods 5 can move the grinding wheel base body 7 upward from the top of the guide seat 3 during the demolding process, cooperate with the sliding of the concave die 10, better realize demolding operation, and reduce the damage of the grinding wheel blank during the demolding process, the second hydraulic rods 5 provide auxiliary power for the demolding of the grinding wheel base body 7, through the cooperative work with the first hydraulic rods 2, the demolding process is more smooth, and the qualified rate of products is improved.

[0022] The middle part of the bottom of the bottom plate 1 is rotatably connected with a positioning rod 6, the top of the guide seat 3 is detachably connected with a grinding wheel base 7, one end of the positioning rod 6 penetrating out of the guide seat 3 is threadedly connected with a pressing block 8, the bottom of the pressing block 8 is clamped with the top of the grinding wheel base 7, the outer surface of the pressing block 8 is fixedly connected with a flow guide ring 9, the outer surface of the guide seat 3 is slidably connected with a concave die 10, the positioning rod 6 is rotatably connected in the middle part of the bottom of the bottom plate 1 and threadedly connected with the pressing block 8 penetrating out of the guide seat 3, which can accurately position the pressing block 8 and ensure that the pressing block 8 can apply uniform pressure to the grinding wheel base 7 during the pressing process, and meanwhile, the threaded connection structure of the positioning rod 6 can make the pressing block 8 more convenient to disassemble and assemble during demolding, the flow guide ring 9 is fixed on the outer surface of the pressing block 8, which can guide the materials used during the preparation of the grinding wheel during the preparation of the grinding wheel, so that the materials can be uniformly distributed on the grinding wheel base 7, reducing the loss of materials and improving the utilization rate of materials, facilitating the material adding operation of the staff, so that the materials can accurately reach the pressing area according to the predetermined path, avoiding the materials from spilling or unevenly accumulating during the material adding process, and the concave die 10 is slidably connected with the guide seat 3, which cooperates with the guide seat 3 to provide a molding space for the grinding wheel base 7 during the molding of the grinding wheel, cooperates with the convex die 14 to press and mold the grinding wheel, and can slide relative to the guide seat 3 after molding, so that the molded grinding wheel is separated from the concave die 10, facilitating the demolding operation.

[0023] The outer surface of the concave die 10 is fixedly connected with a limiting block 11, the top of the limiting block 11 is overlapped with the bottom of a supporting ring 12, the outer surface of the concave die 10 is detachably connected with the supporting ring 12, the top of the supporting ring 12 is provided with a collecting groove 13, the inner wall of the concave die 10 is slidably connected with a convex die 14, the outer surfaces of the bottom plate 1 and the convex die 14 are fixedly connected with a fixed seat 15, and the outer surface of the fixed seat 15 is fixedly connected with a gasket, which is arranged on the outer surfaces of the bottom plate 1 and the convex die 14 through the fixed seat 15, plays a role in fixing and connecting other auxiliary components, increases the sealing and stability of the connecting part, reduces the friction and vibration between the components, improves the overall stability and durability of the mold, and the convex die 14 is slidably connected with the inner wall of the concave die 10, which cooperates with the concave die 10 to apply pressure to the grinding wheel base 7 and the materials during the pressing process, so that they are molded, and the supporting ring 12 is detachably connected with the outer surface of the concave die 10, and the collecting groove 13 provided at the top of the supporting ring 12 can collect excess materials during the pressing process, so that the excess materials can be recycled and reused, reducing the waste of materials.

[0024] In summary, the composite polycrystalline boron nitride CBN grinding wheel mold has the following use steps:

[0025] 1. Add CBN abrasive, binder and other auxiliary materials to both sides of the grinding wheel base 7. The guide ring 9 will guide the material evenly to the grinding wheel base 7, reduce material loss and facilitate the feeding operation. Start the relevant equipment to make the punch 14 slide down the inner wall of the die 10 and cooperate with the die 10 to apply pressure to the grinding wheel base 7 and the material. Under the synergistic action of the positioning rod 6 and the pressure block 8, the material is compacted and formed into a grinding wheel blank with a certain strength. If there is excess material during the pressing process, it will fall into the collection groove 13 at the top of the support ring 12 for recycling and reuse.

[0026] 2. Activate the first hydraulic rod 2, whose output end pushes the die 10 to slide upward on the outer surface of the guide seat 3, so that the formed grinding wheel and the die 10 gradually separate. At the same time, or after the die 10 has slid a certain distance, activate the second hydraulic rod 5 to move the grinding wheel base 7 upward from the top of the guide seat 3. Through the sliding of the die 10 and the opposite movement of the grinding wheel base 7, the demolding operation is better realized, and the damage to the grinding wheel blank is reduced.

[0027] 3. After demolding, remove the formed grinding wheel from the mold for subsequent processing and treatment.

[0028] The above description is only for illustrating the present utility model. It should be understood that the present utility model is not limited to the above embodiments, and various modifications that conform to the concept of the present utility model are within the protection scope of the present utility model.

Claims

1. A composite polycrystalline boron nitride (CBN) grinding wheel mold comprising a base plate (1), characterized in that: The middle part of the top of the bottom plate (1) is fixedly connected with a guide seat (3), the middle part of the bottom of the bottom plate (1) is rotatably connected with a positioning rod (6), the top of the guide seat (3) is detachably connected with a grinding wheel base body (7), one end of the positioning rod (6) penetrating through the guide seat (3) is threadedly connected with a pressing block (8), the outer surface of the pressing block (8) is fixedly connected with a flow guide ring (9), the outer surface of the guide seat (3) is slidably connected with a female die (10), the outer surface of the female die (10) is detachably connected with a supporting ring (12), the top of the supporting ring (12) is provided with a collecting groove (13), and the inner wall of the female die (10) is slidably connected with a male die (14).

2. The composite polycrystalline boron nitride (CBN) grinding wheel mold according to claim 1, wherein: A plurality of first hydraulic rods (2) are fixedly installed on the top of the bottom plate (1), and the output ends of the plurality of first hydraulic rods (2) are fixedly connected with the bottom of the female die (10).

3. The composite polycrystalline boron nitride (CBN) grinding wheel mold of claim 1, wherein: The top of the guide seat (3) is provided with mounting grooves (4) on both sides, and the inner bottom wall of the mounting groove (4) is fixedly installed with a second hydraulic rod (5).

4. The composite polycrystalline boron nitride (CBN) grinding wheel mold of claim 1, wherein: The bottom of the pressing block (8) is clamped with the top of the grinding wheel base body (7).

5. The composite polycrystalline boron nitride (CBN) grinding wheel mold of claim 1, wherein: The outer surface of the female die (10) is fixedly connected with a limiting block (11), and the top of the limiting block (11) is overlapped with the bottom of the supporting ring (12).

6. The composite polycrystalline boron nitride (CBN) grinding wheel mold of claim 1, wherein: The outer surfaces of the bottom plate (1) and the male die (14) are fixedly connected with a fixing seat (15), and the outer surface of the fixing seat (15) is fixedly connected with a gasket.

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