Honing wheel trimming cutter

Abstract

The invention discloses a honing wheel trimming cutter, and belongs to the technical field of gear cutters, the honing wheel trimming cutter comprises a cutter body and teeth, the cutter body comprises a cutter base and a PCD blade, the teeth comprise supporting teeth and grinding teeth, the supporting teeth are arranged on the cutter base, the grinding teeth are arranged on the PCD blade, a first area is formed between every two adjacent supporting teeth, and a second area is formed between every two adjacent grinding teeth. A second area is formed between every two adjacent grinding teeth, a first notch is formed in the side, close to the second area, of the first area, a second notch is formed in the side, close to the first area, of the second area, and the first notch and the second notch are spliced to form an inner cooling hole; the cutter base and the PCD blade are bonded through a hot adhesive layer, the hot adhesive layer comprises a plurality of adhesive units, and each adhesive unit is located between the adjacent inner cooling holes. The inner cooling holes are formed to discharge cooling liquid, so that the effects of cooling the trimming cutter and removing chippings can be achieved, and the inner cooling holes are spliced, so that curing of the hot adhesive layer can be promoted, and the bonding effect can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of gear cutters, and in particular to a honing wheel dressing cutter. Background Art

[0002] In the field of mechanical processing, honing wheels are widely used as a high-precision processing tool in the automotive, aerospace, mold manufacturing and other industries. The main function of the honing wheel is to improve the surface quality and dimensional accuracy of the workpiece through grinding and polishing. However, as the processing time increases, the wear of the honing wheel will gradually increase, resulting in a decrease in processing accuracy and even affecting the quality of the workpiece. Therefore, regular dressing of the honing wheel is an important part of ensuring processing quality.

[0003] The dressing of traditional honing wheels uses gear cutters that match the honing wheels to grind the teeth of the honing wheels and adjust their accuracy. In order to pursue the hardness and wear resistance of the cutter, PCD (polycrystalline diamond) blades are usually used as dressing materials. PCD blades are generally made into cutters by welding or gluing to achieve the combination of PCD blades and bases. However, when welding is used, the heat generated during the work of the dressing tool will cause the tool temperature to rise, and cracks will form at the welding point, which will affect the service life of the tool; when gluing is used, due to the limitations of traditional bonding processes, the temperature is difficult to be effectively transferred to the inside of the glue, which will affect the full curing of the glue. This deficiency will reduce the bonding effect, which is specifically manifested in the weakening of the shear resistance of the bonding area. In particular, when the dressing tool is used to dress the honing wheel by rotating, the PCD blade and the base are prone to relative sliding. This trend not only further weakens the bonding effect, but also affects the stability of the entire tool structure. Summary of the invention

[0004] The present invention aims to solve the problem of poor structural stability of the above-mentioned traditional honing wheel dressing tools and provide a honing wheel dressing tool, which has the advantages of strong structural stability, low production cost and long service life, and is provided with an internal cooling hole to guide the coolant to achieve the effect of cooling and chip removal.

[0005] In the first aspect, in order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is:

[0006] A honing wheel dressing tool comprises a tool body and teeth, wherein the tool body comprises a tool base and a PCD blade, the teeth comprise supporting teeth and grinding teeth, wherein the supporting teeth are arranged on the tool base, and the grinding teeth are arranged on the PCD blade, a first area is formed between adjacent supporting teeth, and a second area is formed between adjacent grinding teeth, a side of the first area close to the second area is provided with a long strip first notch arranged along the radial direction of the tool base, and a side of the second area close to the first area is provided with a long strip second notch arranged along the radial direction of the PCD blade, and the first notch and the second notch are spliced ​​to form an inner cooling hole; the tool base and the PCD blade are bonded by a hot adhesive layer, and the hot adhesive layer comprises a plurality of adhesive units, each of which is located between adjacent inner cooling holes.

[0007] Preferably, the thickness of the tool base is greater than the thickness of the PCD blade, and the groove depth of the first notch is greater than the groove depth of the second notch.

[0008] Preferably, the PCD insert comprises a base layer and a PCD layer, the thickness of the base layer is greater than the thickness of the PCD layer, and the second notch is opened in the base layer.

[0009] Preferably, at least one of the inner cooling holes has an anti-slip pin fixedly installed therein, the anti-slip pin being used to limit the relative sliding between the tool base and the PCD insert, the anti-slip pin being a hollow structure, and having openings at both ends to form drainage holes.

[0010] Preferably, the cross section of the inner cooling hole is a parallelogram, and the shape of the anti-slip pin matches the shape of the inner cooling hole.

[0011] Preferably, the diameter of the inner cooling hole in which the anti-slip pin is installed is larger than the diameters of other inner cooling holes.

[0012] Preferably, the axis of the tool base is provided with a sleeve for the PCD blade to be sleeved on the sleeve and bonded to the tool base. The sleeve is also equipped with a press-fit ring which is pressed onto the PCD blade. The sleeve is provided with a connecting hole which passes through the inner and outer walls, and the connecting hole is connected to the inner cooling hole.

[0013] Preferably, a coating layer is provided on the inner wall of the inner cooling hole.

[0014] Preferably, the size of the supporting teeth is smaller than the size of the grinding teeth.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By setting up inner coolant holes to discharge coolant, the dressing tool can be cooled and debris can be cleaned. The inner coolant holes are spliced ​​so that they are located at the joint between the tool base and the PCD insert. This design enables the inner coolant holes to separate the hot glue layer. Since the separated glue units are easily exposed to the outside air at the edges, they are more likely to be exposed to high temperatures during the vacuum hot pressing process. This not only reduces the vacuum hot pressing time and improves production efficiency, but also ensures that the glue is fully cured and enhances the bonding effect. Therefore, the splicing design of the inner coolant holes effectively promotes the curing and stability of the hot glue layer. In particular, the inner coolant holes composed of the first notch and the second notch only need to be processed by the slotting process, which is simpler and more economical to operate than the drilling process.

[0017] 2. By inserting the anti-skid pin in the inner coolant hole, the relative sliding of the tool base and the PCD blade can be prevented, and no additional through hole is required to fix the anti-skid pin, which ensures the structural stability of the tool base and the PCD blade. In addition, since the anti-skid pin is inserted radially by the trimming tool, its force-bearing area is long and has a larger area and better shear resistance. In addition, by setting a drainage hole inside the anti-skid pin to replace the inner coolant hole occupied by the anti-skid pin, the normal discharge of the coolant is not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the dressing tool of the present invention.

[0019] Figure 2 It is a schematic diagram of the internal cooling hole distribution structure of the present invention.

[0020] Figure 3 It is a schematic diagram of the first notch distribution structure of the present invention.

[0021] Figure 4 It is a schematic diagram of the second notch distribution structure of the present invention.

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of the anti-skid pin of the present invention.

[0023] Figure 6 It is a schematic diagram of the anti-skid pin distribution structure of the present invention.

[0024] In the figure: 1. tool base, 11. supporting teeth, 2. PCD blade, 21. grinding teeth, 3. bushing, 4. press-fit ring, 5. internal cooling hole, 6. first notch, 7. hot-adhesive layer, 8. connecting hole, 9. second notch, 10. anti-slip pin, 101. drainage hole. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0026] like Figure 1 As shown, a honing wheel dressing tool is disclosed, including a tool body and teeth, the tool body includes a tool base 1 and a PCD blade 2, the teeth include supporting teeth 11 and grinding teeth 21, wherein the supporting teeth 11 are arranged on the tool base 1, and the grinding teeth 21 are arranged on the PCD blade 2. The dressing tools all adopt a tool body formed by a combination of a base and a blade, and the teeth are used to repair the geometric shape and surface quality of the honing wheel. The tool base 1 is used as an installation support for the PCD blade 2, and the PCD blade 2 is mainly used to achieve the dressing of the honing wheel. During the use of the honing wheel, its surface will form an irregular shape or a passivation layer due to wear, and the function of the grinding teeth 21 is to remove these wear layers by grinding and restore the original geometric shape of the honing wheel. In order to ensure the stability of the tool base 1 support, the supporting teeth 11 are used to support the grinding teeth 21. The size of the supporting teeth 11 is smaller than that of the grinding teeth 21 , so that the grinding teeth 21 protrude out of the shielding range of the supporting teeth 11 , thereby ensuring the contact between the grinding teeth 21 and the honing wheel.

[0027] like Figure 1 and Figure 2 As shown, a first area is formed between adjacent supporting teeth 11, and a second area is formed between adjacent grinding teeth 21. A long first slot 6 arranged radially along the tool base 1 is provided on the side of the first area close to the second area, and a long second slot 9 arranged radially along the PCD blade 2 is provided on the side of the second area close to the first area. The first slot 6 and the second slot 9 are spliced ​​to form an internal cooling hole 5. By setting the inner coolant hole 5, its main function is to serve as a channel for guiding the coolant. When the dressing tool is working, the grinding of the teeth and the passivation layer will generate high temperature, and the inner coolant hole 5 is set between adjacent teeth, so the discharged coolant can just flush the teeth, play a cooling effect, and avoid the dressing tool from being affected by the stability due to long-term high temperature. In the process of flushing, the coolant can also bring out the debris generated by grinding, and can also play a cleaning role. The inner coolant hole 5 adopts the form of splicing, and the first notch 6 is opened on the tool base 1, and the second notch 9 is opened on the PCD blade 2. Finally, the inner coolant hole 5 is spliced ​​together. Such a slotted design can replace the traditional drilling process. Since drilling has high requirements on precision and processing equipment, slotting can reduce the processing difficulty of the dressing tool, and the splicing form can make the inner coolant hole 5 just at the splicing of the tool base 1 and the PCD blade 2, and also provide technical support for the subsequent separation of the hot glue layer 7.

[0028] The tool base 1 and the PCD insert 2 are bonded together by a hot glue layer 7, which includes a plurality of glue units, each of which is located between adjacent inner cooling holes 5. As mentioned above, the main function of the inner cooling hole 5 is to serve as a guide channel for the coolant, and the second function is to divide the hot glue layer 7 into a plurality of glue units, such as Figure 3 and Figure 4 As shown, the first notches 6 of the tool base 1 are distributed circumferentially, and the second notches 9 of the PCD insert 2 are also distributed circumferentially. The distribution of the internal coolant holes 5 formed by splicing is consistent with the distribution of the notches inside the trimming tool, so that an independent area is formed between the splicing gap between the tool base 1 and the PCD insert 2 and the adjacent internal coolant holes 5. The tool base 1 and the PCD insert 2 are bonded by a hot glue layer 7, and the hot glue layer 7 is composed of a plurality of glue units. The formed independent area is just used to set the glue unit, so that the tool base 1 and the PCD insert 2 can be fully bonded together. The vacuum hot pressing process is required for bonding the seat 1 and the PCD blade 2. During the curing process of the glue, the temperature needs to be continuously raised. The heat will fully contact the adhesive unit along the inner cooling hole 5, thereby improving the curing efficiency of the adhesive unit. The heat is easier to transfer to the hot adhesive layer 7, reducing heat loss, and also reducing the production cost of the trimming tool. Compared with the traditional use of a whole hot adhesive layer 7, the independent adhesive unit has a small area and is easier to cure inside, ensuring the bonding effect, thereby enhancing the connection stability between the PCD blade 2 and the tool base 1, and improving the shear resistance of the hot adhesive layer 7. The above is the role of the inner cooling hole 5 in the production process of the trimming tool. When the trimming tool is working, the coolant will also be discharged along the inner cooling hole 5. The coolant flow process can also cool the adhesive unit and extend the service life of the hot adhesive layer 7. The method of curing glue by vacuum hot pressing process belongs to the prior art, and there are many types of hot-adhesive layers 7 used, such as epoxy resin adhesive, polyimide adhesive, phenolic resin adhesive, acrylate adhesive, silicone rubber adhesive, etc. The use of each glue will not be described in detail here.

[0029] The tool body of the above-mentioned dressing tool mostly adopts the combination of tool base 1 and PCD blade 2 because PCD blade 2 has high cost and is difficult to produce. In the process of honing wheel dressing, the high hardness and wear resistance of PCD blade 2 are mainly relied on. Therefore, PCD blade 2 with small thickness is difficult to match the thickness of the honing wheel and is difficult to install. Therefore, most of them are thickened through tool base 1. In order to ensure the diversion effect of inner coolant hole 5, the aperture of inner coolant hole 5 cannot be too small. Therefore, the first notch 6 and the second notch 9 need to be designed as follows: the thickness of tool base 1 is greater than the thickness of PCD blade 2, and the groove depth of first notch 6 is greater than the groove depth of second notch 9. The thickness of tool base 1 is greater than PCD blade 2 so that the overall thickness after bonding can meet the honing wheel. In order to save the use cost, PCD blade 2 with small thickness is used. According to the thickness design, the groove depth of first notch 6 is greater than that of second notch 9, which also ensures the aperture size of inner coolant hole 5. Since the use cost of the PCD blade 2 is high, the PCD blade 2 can also be designed as follows: the PCD blade 2 includes a base layer and a PCD layer, the thickness of the base layer is greater than the thickness of the PCD layer, and the second notch 9 is opened in the base layer. The second notch 9 is opened in the base layer, which will not destroy the integrity of the PCD layer. In this way, the stability of the PCD blade 2 is stronger. The base layer is made of metal material, and the PCD layer is made of diamond material, so it is also easier to open regular notches in the base layer.

[0030] like Figure 5 As shown, at least one of the inner cooling holes 5 has an anti-slip pin 10 fixedly installed therein. The anti-slip pin 10 is used to limit the relative sliding between the tool base 1 and the PCD insert 2. The anti-slip pin 10 is a hollow structure, and openings are provided at both ends to form a drainage hole 101. The third function of the inner cooling holes 5 is to select at least one of them for use as an anti-slip pin 10 for installation. The anti-slip pin 10 can limit the relative sliding of the tool base 1 and the PCD blade 2, thereby improving the stability and service life of the bonding. The anti-slip principle of the anti-slip pin 10 is as follows: the inner cooling hole 5 is between the tool base 1 and the PCD blade 2. When the anti-slip pin 10 is inserted into the inner cooling hole 5, a part of it will be in the first notch 6 and the other part will be in the second notch 9. Since the anti-slip pin 10 is an integrated structure, the tool base 1 and the PCD blade 2 will inevitably break if they want to slide relative to each other. Therefore, the anti-shear force of the anti-slip pin 10 is used to limit the relative sliding of the tool base 1 and the PCD blade 2. In order to prevent the anti-slip pin 10 from occupying one of the inner cooling holes 5 and affecting the effect of the inner cooling hole 5 in guiding the coolant, the anti-slip pin 10 is set to a hollow structure, and the interior is used as a drainage hole 101 to continue to guide the coolant. The anti-slip pin 10 can also be set to three, such as Figure 6 As shown, three anti-skid pins 10 are distributed around the circumference to jointly resist shear force and provide greater stability.

[0031] The shape of the inner cooling hole 5 is not limited above, because no matter what shape the first notch 6 and the second notch 9 are formed into, the inner cooling hole 5 can play a guiding effect, but in order to better cooperate with the installation of the anti-slip pin 10, such as Figure 5 As shown, the cross section of the inner cooling hole 5 is a parallelogram, the shape of the anti-skid pin 10 matches the shape of the inner cooling hole 5, the top two corners of the anti-skid pin 10 can be in the second notch 9, and the bottom two corners can be in the first notch 6, and there will be no relative sliding with the notch. Compared with setting the inner cooling hole 5 and the anti-skid pin 10 to be cylindrical, the force is more stable and the anti-shear effect is stronger. When the anti-skid pin 10 occupies the inner cooling hole 5, in order to ensure that the guiding effect of this inner cooling hole 5 is not affected, the aperture of the inner cooling hole 5 installed with the anti-skid pin 10 is larger than the aperture of other inner cooling holes 5, and the aperture of this inner cooling hole 5 is enlarged, then the drainage hole 101 of the anti-skid pin 10 can also be enlarged to reach the specifications of the aperture of other inner cooling holes 5, so as to keep the guiding effect of each inner cooling hole 5 consistent.

[0032] like Figure 1 As shown, a sleeve 3 is provided at the axis of the tool base 1, for the PCD blade 2 to be sleeved on the sleeve 3 and bonded to the tool base 1, and a press-fitting ring 4 is also installed on the sleeve 3 and pressed on the PCD blade 2, and a connecting hole 8 is provided on the sleeve 3 to penetrate the inner and outer walls, and the connecting hole 8 is connected to the inner cooling hole 5. Although the insertion of the anti-slip pin 10 can resist the horizontal relative sliding between the tool base 1 and the PCD blade 2, there is still a force for the tool base 1 and the PCD blade 2 to separate longitudinally, so the press-fitting ring 4 can resist the force for the longitudinal separation of the tool base 1 and the PCD blade 2, so that the formed dressing tool structure is more stable, and the sleeve 3 is also for the convenience of installing the dressing tool on the driving device, and the connecting hole 8 can be used as the inlet of the coolant.

[0033] A coating layer is provided on the inner wall of the inner cooling hole 5. With respect to the three functions of the inner cooling hole 5 mentioned above, the coating layer provided can play a protective role. For example, in the first function, the inner cooling hole 5 is used as a guide coolant, and the coating layer can prevent the coolant from corroding the adhesive unit. In the second function, the coating layer of the inner cooling hole 5 can isolate the adhesive unit from contact with the air and reduce the occurrence of oxidation. In the third function, the coating layer can also reduce the wear on the inner wall of the inner cooling hole 5 when installing the anti-slip pin 10.

[0034] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and range of equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0035] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A honing wheel dressing tool, comprising a tool body and teeth, wherein the tool body comprises a tool base (1) and a PCD blade (2), the teeth comprise supporting teeth (11) and grinding teeth (21), wherein the supporting teeth (11) are arranged on the tool base (1), and the grinding teeth (21) are arranged on the PCD blade (2), characterized in that: A first area is formed between adjacent supporting teeth (11), and a second area is formed between adjacent grinding teeth (21); a first long slot (6) arranged along the radial direction of the tool base (1) is provided on a side of the first area close to the second area; a second long slot (9) arranged along the radial direction of the PCD blade (2) is provided on a side of the second area close to the first area; the first slot (6) and the second slot (9) are spliced ​​to form an inner cooling hole (5); The tool base (1) and the PCD blade (2) are bonded together via a hot glue layer (7), wherein the hot glue layer (7) comprises a plurality of glue units, each of which is located between adjacent inner cooling holes (5).

2. A honing wheel dressing tool according to claim 1, characterized in that: The thickness of the tool base (1) is greater than the thickness of the PCD blade (2), and the groove depth of the first notch (6) is greater than the groove depth of the second notch (9).

3. A honing wheel dressing tool according to claim 1, characterized in that: The PCD blade (2) comprises a base layer and a PCD layer, the thickness of the base layer is greater than the thickness of the PCD layer, and the second notch (9) is opened in the base layer.

4. A honing wheel dressing tool according to claim 1, characterized in that: At least one of the inner cooling holes (5) has an anti-slip pin (10) fixedly installed therein. The anti-slip pin (10) is used to limit the relative sliding between the tool base (1) and the PCD blade (2). The anti-slip pin (10) is a hollow structure, and openings are provided at both ends to form a drainage hole (101).

5. A honing wheel dressing tool according to claim 4, characterized in that: The cross section of the inner cooling hole (5) is a parallelogram, and the shape of the anti-slip pin (10) matches the shape of the inner cooling hole (5).

6. A honing wheel dressing tool according to claim 4, characterized in that: The diameter of the inner cooling hole (5) on which the anti-slip pin (10) is installed is larger than the diameters of other inner cooling holes (5).

7. A honing wheel dressing tool according to claim 4, characterized in that: The axis of the tool base (1) is provided with a sleeve (3) for the PCD blade (2) to be sleeved on the sleeve (3) and bonded to the tool base (1); a press-fitting ring (4) is also installed on the sleeve (3) and is pressed onto the PCD blade (2); a connecting hole (8) is provided on the sleeve (3) and passes through the inner and outer walls; the connecting hole (8) is connected to the inner cooling hole (5).

8. The honing wheel dressing tool according to claim 1, characterized in that: The inner wall of the inner cooling hole (5) is provided with a coating layer.

9. The honing wheel dressing tool according to claim 1, characterized in that: The size of the supporting teeth (11) is smaller than the size of the grinding teeth (21).

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