Hole milling clamp assembly for hard alloy machining

Abstract

The utility model relates to the technical field of machining clamps, in particular to a hole milling clamp assembly for hard alloy machining, which comprises a base, a positioning column is arranged at the center of the base, a hole column is arranged at the center of the positioning column, and fixing holes which downwards extend into the positioning column and the base in sequence are formed in the hole column. The hard alloy comprises a positioning part and a punching part, a positioning hole is formed in the center of the hard alloy, two bolts are arranged on the base, and the hard alloy sleeves the positioning column; a cover plate, a positioning mechanism and a pressing mechanism are further included, curved grooves are inwards formed in the two opposite side ends of the cover plate, and a positioning through groove is further formed in the cover plate. The base, the positioning column, the plug pin, the cover plate, the positioning mechanism and the pressing mechanism are used in cooperation, hard alloy is positioned, the portion where a top face counter bore needs to be machined is exposed through the curved groove to be machined through the cover plate and the positioning mechanism, and the top face counter bore is machined through positioning of the positioning through groove and the positioning mechanism. And it is guaranteed that the machined top face counter bores are perpendicular to the machined bottom face counter bores.

Description

Technical Field

[0001] This utility model relates to the field of cemented carbide machining technology, and specifically to a milling fixture assembly for cemented carbide machining. Background Technology

[0002] Cemented carbide is a composite material with metal carbides as its main component. The machining of cemented carbide falls under the category of preparation and processing technology for metals and metal-matrix composites. Cemented carbide is mainly used in cutting tools, wear-resistant parts, and various industrial applications. It is particularly prevalent as a wear-resistant component, for example, in mechanical seals.

[0003] When cemented carbide is used in mechanical seals, an existing sealing component has a convex cross-section with a central hole for the sealing shaft to pass through. To fix this sealing component, two countersunk holes are required at the bottom and top during machining. To ensure uniformity and stability, the lines connecting the two countersunk holes must be perpendicular. In existing technology, the two symmetrical countersunk holes at the bottom are typically machined first, followed by the two countersunk holes at the top. However, due to a lack of product positioning, the perpendicularity of the countersunk holes at the top and bottom cannot be guaranteed. This invention provides a milling fixture assembly for cemented carbide machining to position the cemented carbide with pre-machined bottom countersunk holes, enabling efficient machining of top countersunk holes perpendicular to the bottom countersunk holes. This provides high efficiency, good positioning, and ensures machining quality. Utility Model Content

[0004] This invention provides a milling fixture assembly for machining cemented carbide to efficiently machine top surface countersunk holes perpendicular to the bottom surface countersunk holes, achieving high efficiency, good positioning effect, and ensuring machining quality.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A milling fixture assembly for machining cemented carbide is provided, the innovation of which lies in: including a cylindrical base, a positioning post at the center of the base, a hole post at the center of the positioning post, and a fixing hole extending downwards sequentially into the positioning post and the base; the cemented carbide includes a positioning part with the same outer diameter as the base, a punched part at the center of the upper surface of the positioning part, a positioning hole adapted to the positioning post at the center of the punched part and the positioning part as a whole, two countersunk holes symmetrically provided on the bottom surface of the positioning part, two pins detachably provided on the base corresponding to the two countersunk holes, the cemented carbide being sleeved on the positioning post, the bottom surface fitting against the base, the top surface flush with the positioning post, and the pins inserted into the corresponding countersunk holes;

[0006] It also includes a cover plate, a positioning mechanism, and a pressing mechanism. The cover plate has curved grooves on its opposite sides. The cover plate also has a positioning through groove. One end of the positioning through groove is located at the center of the cover plate to receive the hole post, and the other end extends to the outside of the cover plate. The line connecting the positioning through groove and the two curved grooves is perpendicular. The cover plate covers the positioning post and the perforated part. The positioning mechanism is located on the side of the base with one of the pins, and the top is a positioning plate that can be rotated into the positioning through groove. The pressing mechanism is detachably connected to the fixing hole and presses the cover plate downward.

[0007] Furthermore, the outer diameter of the cover plate is the same as the outer diameter of the drilled part of the cemented carbide, and after the cover plate is placed on the positioning post, its height is lower than that of the hole post.

[0008] Furthermore, the positioning mechanism includes an inverted L-shaped positioning component. The horizontal end of the positioning component is connected to the side of the base. The top of the vertical part of the positioning component is U-shaped. The two sides of the top of the vertical part of the positioning component are connected by connecting rods. The height of the connecting rods is flush with the positioning through groove. One end of the positioning plate is rotatably sleeved on the connecting rod and can be rotated into the positioning through groove. The thickness of the positioning plate is the same as the thickness of the cover plate.

[0009] Furthermore, the clamping mechanism includes a T-shaped driving member, with a clamping plate rotatably connected to the upper part of the vertical section of the driving member. The clamping plate has a groove at the center of its bottom, which is adapted to the column portion protruding from the cover plate. The vertical section of the driving member is threadedly connected to a fixing hole.

[0010] Furthermore, a limiting hole is provided on the positioning post near the hole post, and a limiting rod is provided on the bottom of the pressing plate corresponding to the limiting hole. The limiting rod passes through the cover plate through the positioning groove and is inserted into the limiting hole.

[0011] Furthermore, the structure in which the vertical part of the clamping plate and the driving component are rotatably connected is as follows: a rotating component is provided on the upper part of the vertical part of the driving component, and a rotating groove is provided on the clamping component corresponding to the position of the rotating component, and the rotating component is rotatably placed in the rotating groove.

[0012] Furthermore, pressure plates extend symmetrically outward from opposite sides of the pressure plate.

[0013] Furthermore, the structure in which the pin is detachably connected to the base is such that the base has a threaded groove at the position where the pin is located, the lower part of the pin has a thread, and the lower part of the pin is threadedly connected to the threaded groove.

[0014] Furthermore, the bottom of the positioning post connecting base is provided with a ring groove from the outside to the inside.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This utility model discloses a milling fixture assembly for machining cemented carbide. Through the coordinated use of a base, positioning pin, pin, cover plate, positioning mechanism and clamping mechanism, the cemented carbide is positioned, and the part to be machined for the top surface countersunk hole is exposed through the curved groove by the cover plate and positioning mechanism. The positioning groove and positioning mechanism ensure that the machined top surface countersunk hole and bottom surface countersunk hole are perpendicular.

[0017] This invention also uses a clamping mechanism to clamp the cover plate and the components below it, ensuring stability when drilling countersinking holes in the cemented carbide section and improving drilling quality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the hard alloy to be processed according to this utility model.

[0020] Figure 2 This is a schematic diagram of the base, positioning column, and positioning mechanism of a milling fixture assembly for machining cemented carbide according to the present invention.

[0021] Figure 3 For the present utility model Figure 2 A schematic diagram of the structure with added cemented carbide that needs to be processed.

[0022] Figure 4 For the present utility model Figure 3 A schematic diagram of the structure with a cover plate added.

[0023] Figure 5 For the present utility model Figure 4 A schematic diagram of the added clamping mechanism (the positioning plate rotates into the positioning slot).

[0024] Figure 6 For the present utility model Figure 5 A schematic diagram of the structure with a pressure plate added.

[0025] Figure 7 For the present utility model Figure 5 Cross-sectional view.

[0026] Figure 8 For the present utility model Figure 6 The clamping mechanism in the middle is clamped onto the cover plate in a cross-sectional view.

[0027] The components are as follows: 1. Base; 2. Positioning post; 3. Hole post; 4. Fixing hole; 5. Positioning part; 6. Drilling part; 7. Positioning mechanism; 71. Positioning plate; 72. Positioning component; 73. Connecting rod; 8. Pressing mechanism; 81. Driving component; 82. Pressing plate; 83. Column groove; 84. Limiting hole; 85. Limiting rod; 86. Rotating component; 87. Rotating groove; 88. Pressing plate; 10. Positioning hole; 11. Countersunk hole; 12. Pin; 13. Cover plate; 14. Curved groove; 15. Positioning through groove; 16. Threaded groove; 17. Annular groove. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1

[0030] This embodiment provides a milling fixture assembly for machining cemented carbide, including a cylindrical base 1, a positioning post 2 at the center of the base 1, and a hole post 3 at the center of the positioning post 2. Figure 2 As shown, the post 3 has fixing holes 4 that extend downwards sequentially into the positioning post 2 and the base 1; the cemented carbide includes a positioning part 5 with the same outer diameter as the base 1, and a perforated part 6 is provided at the center of the upper surface of the positioning part 5, such as... Figure 1 As shown, ( Figure 1 The two holes at the top of the drilling part 6 are countersunk holes 11 that need to be machined. The drilling part 6 and the positioning part 5 are provided with positioning holes 10 at the center that are adapted to the positioning post 2. The bottom surface of the positioning part 5 is provided with two countersunk holes 11 symmetrically. The base 1 is provided with two detachable pins 12 corresponding to the two countersunk holes 11. The hard alloy is sleeved on the positioning post 2, the bottom surface is in contact with the base 1, the top surface is flush with the positioning post 2, and the pins 12 are inserted into the corresponding countersunk holes 11. Figure 3 As shown.

[0031] It also includes a cover plate 13, a positioning mechanism 7, and a clamping mechanism 8. The cover plate 13 has inwardly curved grooves 14 on its opposite sides. The cover plate 13 also has a positioning through groove 15. One end of the positioning through groove 15 is located at the center of the cover plate 13, receiving the post 3, and the other end extends to the outside of the cover plate 13. The line connecting the positioning through groove 15 and the two curved grooves 14 is perpendicular. The cover plate 13 covers the positioning post 2 and the perforated part 6. The positioning mechanism 7 is located on the side of the base 1 corresponding to one of the pins 12, and its top is a positioning plate 71 that can rotate into the positioning through groove 15. Figure 4-8 As shown, the clamping mechanism 8 is detachably connected to the fixing hole 4 and presses down on the cover plate 13.

[0032] In this embodiment, the cemented carbide is fitted onto the positioning post 2, and the cover plate 13 is placed over the positioning post 2 and the drilled portion 6. The cover plate 13 is rotated to the position corresponding to the positioning plate 71 in the positioning groove 15, and the positioning plate 71 is rotated into the positioning groove 15. Then, the cover plate 13 and the portion below it are pressed by the clamping mechanism 8. The two curved grooves 14 on the positioning groove 15 are exposed on the top surface of the drilled portion 6. A milling head is used to drill holes on the top surface of the drilled portion 6 corresponding to the two curved grooves 14. Accurate positioning ensures that the drilled top surface countersunk hole 11 and bottom surface countersunk hole 11 are perpendicular. The clamping mechanism 8 ensures the stability of drilling countersunk holes 11 in the cemented carbide drilled portion 6 and improves the drilling quality.

[0033] Example 2

[0034] Based on the above embodiments, in order to drill holes through the exposed portion of the curved groove 14 on the cover plate 13, the outer diameter of the cover plate 13 in this embodiment is the same as the outer diameter of the drilled portion 6 of the cemented carbide, and the curved groove 14 corresponds to the position on the exposed top surface of the drilled portion 6 where a hole needs to be drilled. After the cover plate 13 is placed on the positioning post 2, its height is lower than that of the hole post 3.

[0035] Example 3

[0036] Based on the above embodiments, the positioning mechanism 7 of this embodiment includes an inverted L-shaped positioning member 72. The horizontal end of the positioning member 72 is connected to the side of the base 1. The top of the vertical part of the positioning member 72 is U-shaped. The two sides of the top of the vertical part of the positioning member 72 are connected by a connecting rod 73. The height of the connecting rod 73 is flush with the positioning through groove 15. One end of the positioning plate 71 is rotatably sleeved on the connecting rod 73 and can be rotated into the positioning through groove 15. The thickness of the positioning plate 71 is the same as the thickness of the cover plate 13.

[0037] In this embodiment, the positioning member 72 is connected to the base 1 at a position corresponding to one of the pins 12. The positioning member 72 at this position can position the positioning plate 71. Since the positioning plate 71 can rotate into the positioning groove 15 of the cover plate 13, the position of the positioning plate 71 also positions the cover plate 13. When the positioning groove 15 of the cover plate 13 rotates to accommodate the positioning plate 71, the position of the positioning groove 15 corresponds to the pin 12. Therefore, at this time, the line connecting the two curved grooves 14 (the two countersunk holes 11 to be drilled) can be perpendicular to the line connecting the two pins 12 (the two bottom countersunk holes 11 of the hard alloy), ensuring the accuracy of drilling.

[0038] Example 4

[0039] Based on the above embodiments, the clamping mechanism 8 of this embodiment includes a T-shaped driving member 81, such as... Figure 5 and 7As shown, a pressure plate 82 is rotatably connected to the upper part of the vertical section of the driving component 81. A column groove 83 is provided at the center of the bottom of the pressure plate 82. The column groove 83 is adapted to the hole column 3 part that protrudes from the cover plate 13. The vertical section of the driving component 81 is threadedly connected to the fixing hole 4.

[0040] In this embodiment, the clamping mechanism 8 is used by rotating the driving member 81 downward within the fixing hole 4, gradually moving the clamping plate 82 downward until the clamping cover plate 13 clamps and fixes the cover plate 13 and the structure below it. The groove 83 is designed to accommodate the protruding post 3 of the cover plate 13. When the clamping plate 82 clamps downward, the top of the post 3 is placed within the groove 83, which enhances the stability of the connection and the strength of the clamping.

[0041] Example 5

[0042] Based on the above embodiments, in order to prevent the clamping plate 82 from rotating with the driving component 81, a limiting hole 84 is provided downward on the positioning post 2 near the hole post 3 in this embodiment, such as... Figure 7 and 8 As shown, a limiting rod 85 is provided at the bottom of the pressing plate 82 corresponding to the limiting hole 84. The limiting rod 85 passes through the cover plate 13 through the positioning groove 15 and is inserted into the limiting hole 84.

[0043] In this embodiment, the setting of the limiting hole 84 and the limiting rod 85 can prevent the pressing plate 82 from rotating as it descends when the rotating drive member 81 drives it downward to press. This avoids wear on the cover plate 13 due to the friction of the pressing plate 82 against the cover plate 13 during the pressing process, thus improving the service life of the device.

[0044] Example 6

[0045] Based on the above embodiments, the structure of the vertical connection between the pressure plate 82 and the driving member 81 in this embodiment is as follows: Figure 7 and 8 As shown, a rotating part 86 is provided on the upper part of the vertical part of the driving part 81, and a rotating groove 87 is provided on the clamping part corresponding to the position of the rotating part 86. The rotating part 86 is rotated and placed in the rotating groove 87.

[0046] In this embodiment, the structure of the vertical part of the clamping plate 82 and the driving member 81 being rotatably connected ensures the connection stability of the clamping plate 82 and the driving member 81 without rotating during the clamping process as the clamping plate 82 moves down with the driving member 81.

[0047] Example 7

[0048] Based on the above embodiments, in order to improve the clamping stability, clamping plates 88 extend symmetrically outward from opposite sides of the clamping disc 82 in this embodiment, such as... Figure 6 and 8 As shown.

[0049] In this embodiment, the setting of the clamping plate 88 increases the clamping contact surface between the clamping mechanism 8 and the cover plate 13, improves the clamping degree, and ensures structural stability during the drilling of cemented carbide.

[0050] Example 8

[0051] Based on the above embodiments, in order to facilitate the replacement of the pin, the structure in this embodiment in which the pin 12 is detachably connected to the base 1 is as follows. Figure 7 and 8 As shown, the base 1 has a threaded groove 16 at the position where the pin 12 is located, and the lower part of the pin 12 is threaded and the lower part of the pin 12 is threaded into the threaded groove 16.

[0052] In this embodiment, the pin 12 is detachable, which allows for easy disassembly and replacement of the pin 12 while positioning the hard alloy, making it flexible and convenient to use.

[0053] Example 9

[0054] Based on the above embodiments, in order to improve the connection stability between the fixture and the product, the bottom of the positioning post 2 connecting to the base 1 in this embodiment is provided with a ring groove 17 from the outside to the inside, such as... Figure 2 , 7 As shown in Figure 8.

[0055] In this embodiment, the ring groove 17 can clean the connection root of the cemented carbide positioning part 5 and the positioning post 2, so that the inner side of the cemented carbide positioning part 5 and the outer side of the positioning post 2 are completely in contact, thereby improving the connection stability between the fixture and the product and ensuring the processing quality.

[0056] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the concept and scope of the present utility model. Without departing from the design concept of the present utility model, all modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope of the present utility model. The technical content for which protection is sought in the present utility model has been fully described in the technical requirements.

Claims

1. A milling fixture assembly for machining cemented carbide, characterized in that: The device includes a cylindrical base with a positioning post at its center and a hole at its center. The hole has fixing holes extending downwards into the positioning post and the base. The carbide part includes a positioning section with the same outer diameter as the base. The upper surface of the positioning section has a punched section at its center. The punched section and the positioning section together have a positioning hole at their center that is adapted to the positioning post. The bottom surface of the positioning section has two countersunk holes symmetrically arranged. The base has two detachable pins corresponding to the two countersunk holes. The carbide part is sleeved on the positioning post, with its bottom surface fitting against the base and its top surface flush with the positioning post. The pins are inserted into the corresponding countersunk holes. It also includes a cover plate, a positioning mechanism, and a pressing mechanism. The cover plate has curved grooves on its opposite sides. The cover plate also has a positioning through groove. One end of the positioning through groove is located at the center of the cover plate to receive the hole post, and the other end extends to the outside of the cover plate. The line connecting the positioning through groove and the two curved grooves is perpendicular. The cover plate covers the positioning post and the perforated part. The positioning mechanism is located on the side of the base with one of the pins, and the top is a positioning plate that can be rotated into the positioning through groove. The pressing mechanism is detachably connected to the fixing hole and presses the cover plate downward.

2. The milling fixture assembly for cemented carbide machining according to claim 1, characterized in that: The outer diameter of the cover plate is the same as the outer diameter of the drilled part of the cemented carbide. After the cover plate is placed on the positioning post, its height is lower than that of the hole post.

3. The milling fixture assembly for cemented carbide machining according to claim 2, characterized in that: The positioning mechanism includes an inverted L-shaped positioning component. The horizontal end of the positioning component is connected to the side of the base. The top of the vertical part of the positioning component is U-shaped. The two sides of the top of the vertical part of the positioning component are connected by connecting rods. The height of the connecting rods is flush with the positioning through groove. One end of the positioning plate is rotatably sleeved on the connecting rod and can be rotated into the positioning through groove. The thickness of the positioning plate is the same as the thickness of the cover plate.

4. The milling fixture assembly for cemented carbide machining according to claim 2, characterized in that: The clamping mechanism includes a T-shaped driving member, with a clamping plate rotatably connected to the upper part of the vertical section of the driving member. The clamping plate has a groove at the center of its bottom, which is adapted to the column portion protruding from the cover plate. The vertical section of the driving member is threadedly connected to a fixing hole.

5. The milling fixture assembly for machining cemented carbide according to claim 4, characterized in that: The positioning post has a limiting hole located downwards near the hole post, and the bottom of the pressing plate has a limiting rod corresponding to the limiting hole. The limiting rod passes through the cover plate via the positioning groove and is inserted into the limiting hole.

6. The milling fixture assembly for machining cemented carbide according to claim 5, characterized in that: The structure in which the vertical part of the clamping plate and the driving component are rotatably connected is as follows: a rotating component is provided on the upper part of the vertical part of the driving component, and a rotating groove is provided on the clamping plate corresponding to the position of the rotating component. The rotating component is rotatably placed in the rotating groove.

7. The milling fixture assembly for machining cemented carbide according to claim 4, 5, or 6, characterized in that: The clamping plates extend symmetrically outward from opposite sides of the clamping disc.

8. The milling fixture assembly for machining cemented carbide according to claim 1, characterized in that: The structure in which the pin is detachably connected to the base is such that the base has a threaded groove at the position where the pin is located, the lower part of the pin has a thread, and the lower part of the pin is threaded into the threaded groove.

9. The milling fixture assembly for machining cemented carbide according to claim 1, characterized in that: The bottom of the positioning post connecting base has a ring groove from the outside to the inside.

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