Boring cutter capable of precisely and finely adjusting cutting output of cutter teeth

Abstract

The utility model discloses a boring cutter capable of accurately and finely adjusting the cutting output of cutter teeth. The boring cutter comprises a seat rod, a cutter blade and a cutter blade, the tail of the tool apron is arranged in the accommodating hole, and the head is provided with a blade; the outer contour and the size of the tail part of the tool apron are the same as those of the limiting accommodating hole, and the tool apron can slide along the limiting accommodating hole; the variable-pitch control assembly is arranged in the limiting containing hole, and the head end of the variable-pitch control assembly is connected with the tail of the tool apron; when the tail end of the variable-pitch control assembly and the limiting containing hole relatively move by a specific distance, the head end of the variable-pitch control assembly drives the tool apron connected with the head end of the variable-pitch control assembly to shrink and move by times along the limiting containing hole by the specific distance. According to the utility model, the position of the tool apron on the seat post can be quickly and accurately adjusted, so that the extending distance of the cutting edge on the blade is accurately adjusted, and the machining size is further adjusted.

Description

Technical Field

[0001] This utility model relates to the field of casting molds, specifically to a boring tool with precisely adjustable cutting amount of the cutting teeth. Background Technology

[0002] A boring tool is a cutting tool mounted on a boring machine, lathe, or machining center, used to refine existing holes through rotary cutting. It typically consists of a tool holder (fixed part) and an adjustable cutting head, the size of which can be adjusted to accommodate different hole diameters.

[0003] When machining with a boring bar, it is sometimes necessary to adjust the position of the cutting inserts to adjust the machining dimensions. A conventional cutting insert adjustment structure is shown in patent document CN202020361303.7, entitled "A Roughing and Finishing Dual-Mode Adjustable Boring Bar." This design involves setting the cutting insert in a way that allows it to slide on the tool holder. Adjusting the position of the cutting insert on the slide groove allows for adjustment of the cutting insert position, thereby achieving the purpose of adjusting the machining dimensions.

[0004] The aforementioned patented technology requires manual, slow adjustment of the blade's position during blade adjustment. This makes precise adjustment impossible in one attempt and necessitates multiple trial adjustments. Each time the screw is loosened, the limiting and relative position between the blade and the handle changes arbitrarily, which greatly increases the time required to adjust the blade and reduces the accuracy of the blade's position. Utility Model Content

[0005] In view of the above-mentioned deficiencies of the prior art, the purpose of this utility model is to provide a boring tool with precise micro-adjustment of the cutting amount of the cutting teeth, which can quickly and accurately adjust the position of the tool holder on the support rod, thereby precisely adjusting the extension distance of the cutting edge on the blade, and thus adjusting the machining dimensions.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A boring tool with precisely adjustable cutting amount of the cutting teeth, comprising:

[0008] The seat post has a limiting receiving hole on the side of its head end;

[0009] The tool holder has its tail end set in a receiving hole and its head end fitted with a cutting blade; the outer contour and dimensions of the tail end of the tool holder are the same as those of the limiting receiving hole, and it can slide along the limiting receiving hole;

[0010] A pitch control component is installed inside a limiting receiving hole, with its head end connected to the tail end of the tool holder. When the tail end of the pitch control component moves a specific distance relative to the limiting receiving hole, its head end drives the tool holder connected to its head end to move along the limiting receiving hole by a specific distance, reducing its displacement by a factor of two.

[0011] Furthermore, the seat rod is also provided with a first fastening hole with internal threads that communicates with the accommodating limiting hole; the first fastening hole is directly opposite the tool holder; the first fastening hole is provided with a first fastening screw in its internal thread; the tail end of the first fastening screw can abut against the surface of the tool holder to fix the tool holder relative to the limiting accommodating hole.

[0012] Furthermore, the axis of the first fastening hole is perpendicular to the axis of the limiting receiving hole; the inner diameter of the first fastening hole is smaller than the inner wall contour of the limiting receiving hole directly opposite it; there are two of each of the first fastening holes and the first fastening screw.

[0013] Furthermore, the two first fastening holes are located on the same side of the limiting receiving hole and are spaced apart; the first fastening holes are located on the side of the seat rod.

[0014] Furthermore, the pitch control assembly includes: a pitch screw, with a first external thread on the outer surface of the head end and a second external thread on the tail end; the pitch of the first external thread is smaller than the pitch of the second external thread;

[0015] The limiting receiving hole is provided with an internal thread that matches the second external thread; the tail of the tool holder is provided with a concave hole with an internal thread that matches the first external thread; the head end of the variable pitch screw is threadedly connected to the concave hole of the tool holder, and the tail end is threadedly connected to the limiting receiving hole.

[0016] The tail of the variable pitch screw is provided with a turning part. By rotating the variable pitch screw through the turning part, the tool holder is controlled to slide along the limiting receiving hole under the control of the first external thread.

[0017] Furthermore, the limiting receiving hole sequentially includes a first hole and a second hole coaxially arranged and connected; the inner wall of the second hole is provided with an internal thread that matches the second external thread; the outer contour and size of the first hole are the same as the outer contour and size of the tool holder, restricting the tool holder from rotating in the first hole and guiding the tool holder to slide along the first hole;

[0018] The outer contour and dimensions of the tool holder are smaller than the contour and dimensions of the second hole.

[0019] Furthermore, the screwing part includes an internal hexagonal groove, which is disposed on the tail end face of the variable pitch screw.

[0020] Furthermore, the tool holder is provided with a sleeve hole, and a collar is provided in the sleeve hole, the collar being fixedly connected to the tool holder; the second hole is provided in the collar; the second hole penetrates the collar.

[0021] Furthermore, the sleeve hole is circular and coaxial with the first hole;

[0022] The tool holder is provided with a second fastening hole with internal threads that communicates with the sleeve hole. The second fastening hole is directly opposite the collar. A second fastening screw is provided with the internal thread of the second fastening hole. The tail end of the second fastening screw can abut against the surface of the collar to fix the collar and the tool holder relative to each other.

[0023] Furthermore, the seat rod has two limiting receiving holes and two pitch control components; the two edge control components are respectively set in the two limiting receiving holes; the projections of the two limiting receiving holes on the axis of the shaft are rotationally symmetrical about the axis of the seat rod; the two limiting receiving holes are staggered in the axis of the seat rod.

[0024] Due to the adoption of the above technical solution, this utility model has the following advantages:

[0025] 1. The limiting receiving hole accommodates the limiting tool holder. When the tool holder is controlled by the pitch control component, its rotation and movement within the limiting receiving hole are restricted. That is, when the position of the tool holder is adjusted each time, the tool holder and the seat rod are not completely separated. The movement of the tool holder on the seat rod is controllable, reducing the problem of arbitrary changes in the position of the tool holder each time it is adjusted.

[0026] 2. The variable pitch control component can control the tool holder to move in multiples (less than 1) within the support rod when adjusting its tail displacement, achieving more precise control. That is, the change of large displacement drives the synchronous and proportional change of small displacement, making the manual adjustment of the tool holder position more accurate and smooth.

[0027] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0028] The accompanying drawings of this utility model are described below:

[0029] Figure 1 This is a front view schematic diagram of the boring tool with precisely adjustable cutting amount in the embodiment;

[0030] Figure 2 for Figure 1 Schematic diagram of the AA section structure;

[0031] Figure 3 for Figure 2 Enlarged structural diagram at point B;

[0032] Figure 4 This is a top view of the boring bar with precisely adjustable cutting amount in the embodiment.

[0033] Figure 5This is a schematic diagram of the left-hand structure of a boring tool with precisely adjustable cutting amount in the embodiment;

[0034] Figure 6 for Figure 5 Schematic diagram of the C-section structure;

[0035] Figure 7 This is a schematic diagram of the first three-dimensional structure of a boring tool with precisely adjustable cutting amount in the embodiment.

[0036] Figure 8 This is a schematic diagram of the second three-dimensional structure of a boring tool in the embodiment, which allows for precise adjustment of the cutting amount of the cutting teeth.

[0037] In the figure: 1. Seat rod; 111. First hole; 112. Second hole; 12. First fastening hole; 13. Sleeve hole; 14. Collar; 15. Second fastening hole; 2. Tool holder; 21. Concave hole; 22. Blade; 31. Pitch screw; 311. First external thread; 312. Second external thread; 313. Tightening part. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0039] Example:

[0040] like Figures 1 to 8 As shown, a boring tool with precisely adjustable cutting amount of the cutting teeth includes:

[0041] Seat post 1 has a limiting receiving hole on the side of its head end;

[0042] The tool holder 2 has its tail end set in the receiving hole and its head end fitted with a blade 22; the outer contour and size of the tail end of the tool holder 2 are the same as those of the limiting receiving hole, and it can slide along the limiting receiving hole.

[0043] The pitch control component is installed inside the limiting accommodating hole, and its head end is connected to the tail end of the tool holder 2. When the tail end of the pitch control component moves a certain distance relative to the limiting accommodating hole, its head end drives the tool holder 2 connected to its head end to move along the limiting accommodating hole by a certain distance, reducing the displacement by a factor of a certain distance.

[0044] The limiting receiving hole accommodates the limiting tool holder 2. When the tool holder 2 is controlled by the pitch control component, its rotation and movement within the limiting receiving hole are restricted. That is, each time the position of the tool holder 2 is adjusted, the tool holder 2 is not completely separated from the seat rod 1, and the movement of the tool holder 2 on the seat rod 1 is controllable, reducing the problem of arbitrary changes in the position of the tool holder 2 each time it is adjusted. The pitch control component can control the movement of the tool holder 2 within the seat rod 1 by multiples (less than 1) when adjusting its tail displacement, achieving more precise control. That is, the change of large displacement drives the synchronous and proportional change of small displacement, making the manual adjustment of the position of the tool holder 2 more accurate and smooth.

[0045] In this embodiment, as Figure 2 , Figure 3 As shown, the seat rod 1 is also provided with a first fastening hole 12 with internal threads that communicates with the accommodating and limiting hole; the first fastening hole 12 is directly opposite the tool holder 2; the first fastening hole 12 is provided with a first fastening screw (not shown in the figure) in the internal thread; the tail end of the first fastening screw can abut against the surface of the tool holder 2 to fix the tool holder 2 relative to the limiting accommodating hole.

[0046] In this embodiment, as Figure 2 As shown, the axis of the first fastening hole 12 is perpendicular to the axis of the limiting receiving hole; the inner diameter of the first fastening hole 12 is smaller than the inner wall contour of the limiting receiving hole directly opposite it; there are two first fastening holes 12 and two first fastening screws.

[0047] Two first fastening holes 12 are located on the same side of the limiting receiving hole and are spaced apart; the first fastening holes 12 are located on the side of the seat rod 1.

[0048] Setting two first fastening screws can better restrict and fix the tool holder 2. Specifically, in addition to the two first fastening holes 12 being set on the same side in this embodiment, the two first fastening holes 12 can also be set at an included angle, so that multiple sides of the tool holder 2 are tightly fixed to the seat rod 1.

[0049] In this embodiment, as Figure 2 , Figure 3 As shown, the pitch control assembly includes: a pitch screw 31, with a first external thread 331 on the outer surface of the head end and a second external thread 312 on the tail end; the pitch of the first external thread 331 is smaller than the pitch of the second external thread 312.

[0050] The limiting receiving hole is provided with an internal thread that matches the second external thread 312; the tail of the tool holder 2 is provided with a concave hole 21 with an internal thread that matches the first external thread 331; the head end of the variable pitch screw 31 is threadedly connected to the concave hole 21 of the tool holder 2, and the tail end is threadedly connected to the limiting receiving hole.

[0051] The tail of the variable pitch screw 31 is provided with a turning part 313. By rotating the variable pitch screw 31 through the turning part 313, the tool holder 2 is controlled to slide along the limiting receiving hole under the control of the first external thread 331.

[0052] The variable pitch screw 31 has threads at both ends with different pitches, which are matched with the seat rod 1 and the tool holder 2 respectively. After the variable pitch screw 31 rotates relative to the seat rod 1 by a specific angle and moves a certain distance, the tool holder 2 will also move a certain distance along the limiting receiving hole. This distance is less than the distance moved by the variable pitch screw 31. This achieves large displacement control of small displacement, allowing for more precise adjustment of the position of the tool holder 2.

[0053] In this embodiment, as Figure 2 As shown, the limiting receiving hole includes a first hole 111 and a second hole 112 that are coaxially arranged and connected; the inner wall of the second hole 112 is provided with an internal thread that matches the second external thread 312; the outer contour and size of the first hole 111 are the same as the outer contour and size of the tool holder 2, which restricts the tool holder 2 from rotating in the first hole 111 and guides the tool holder 2 to slide along the first hole 111.

[0054] The outer contour and dimensions of the tool holder 2 are smaller than the contour and dimensions of the second hole 112.

[0055] The outer contour and dimensions are designed to be smaller than those of the second hole 112, so that the tool holder 2 and the pitch screw 31 can be smoothly installed into the limiting receiving hole. At the same time, the tool holder 2 can be pre-screwed onto the pitch screw 31, and the depth of the screw can control the maximum and minimum extension of the tool holder 2 on the seat rod 1.

[0056] In this embodiment, as Figure 5 , Figure 7 , Figure 8 As shown, the screwing part 313 includes an internal hexagonal groove, which is disposed on the tail end face of the variable pitch screw 31.

[0057] In this embodiment, as Figure 2 , Figure 3 As shown, the tool holder 2 is provided with a sleeve hole 13, and a collar 14 is provided in the sleeve hole 13. The collar 14 is fixedly connected to the tool holder 2. The second hole 112 is provided in the collar 14. The second hole 112 passes through the collar 14.

[0058] In order to increase the service life of the seat rod 1 and to replace the variable pitch screw 31 with different threads, a collar 14 is provided.

[0059] In this embodiment, as Figure 4 , Figure 6 , Figure 7 , Figure 8 As shown, the sleeve hole 13 is circular and coaxial with the first hole 111;

[0060] The tool holder 2 is provided with a second fastening hole 15 with internal threads that communicates with the sleeve hole 13. The second fastening hole 15 is directly opposite the collar 14. A second fastening screw is provided with the internal thread of the second fastening hole 15. The tail end of the second fastening screw can abut against the surface of the collar 14 to fix the collar 14 and the tool holder 2 relative to each other.

[0061] The collar 14 can be fixed relative to the seat rod 1 by the second fastening screw.

[0062] In this embodiment, as Figure 2 , Figure 7 , Figure 8 As shown, there are two limiting receiving holes and two pitch control components on the seat rod 1; the two edge distance control components are respectively set in the two limiting receiving holes; the projections of the two limiting receiving holes on the axis of the shaft are rotationally symmetrical about the axis of the seat rod 1; the two limiting receiving holes are staggered in the axis of the seat rod 1.

[0063] Setting two tool holders 2 on the support rod 1 can improve the dynamic balance of the support rod 1. At the same time, setting a slight deviation in the height of the two tool holders 2 can allow the cutting tools 22 on the two tool holders 2 to process the workpiece surface step by step along the depth of the support rod 1.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A boring tool with precisely adjustable cutting amount of the cutting teeth, characterized in that, include: The seat post has a limiting receiving hole on the side of its head end; The tool holder has its tail end set in a receiving hole and its head end fitted with a cutting blade; the outer contour and dimensions of the tail end of the tool holder are the same as those of the limiting receiving hole, and it can slide along the limiting receiving hole; A pitch control component is installed inside a limiting receiving hole, with its head end connected to the tail end of the tool holder. When the tail end of the pitch control component moves a specific distance relative to the limiting receiving hole, its head end drives the tool holder connected to its head end to move along the limiting receiving hole by a specific distance, reducing its displacement by a factor of two.

2. The boring tool with precisely adjustable cutting amount of the cutting teeth according to claim 1, characterized in that, The seat rod is also provided with a first fastening hole with internal threads that communicates with the accommodating and limiting hole; the first fastening hole is directly opposite the tool holder; the first fastening hole is provided with a first fastening screw in the internal thread; the tail end of the first fastening screw can abut against the surface of the tool holder to fix the tool holder and the limiting and accommodating hole relative to each other.

3. The boring tool with precisely adjustable cutting amount of the cutting teeth according to claim 2, characterized in that, The axis of the first fastening hole is perpendicular to the axis of the limiting receiving hole; the inner diameter of the first fastening hole is smaller than the inner wall contour of the limiting receiving hole directly opposite it; there are two of each of the first fastening holes and the first fastening screw.

4. The boring tool with precisely adjustable cutting amount of the cutting teeth according to claim 3, characterized in that, The two first fastening holes are located on the same side of the limiting receiving hole and are spaced apart; the first fastening holes are located on the side of the seat rod.

5. The boring tool with precisely adjustable cutting amount of the cutting teeth according to claim 1, characterized in that, The pitch control assembly includes: a pitch screw, with a first external thread on the outer surface of the head end and a second external thread on the tail end; the pitch of the first external thread is smaller than the pitch of the second external thread; The limiting receiving hole is provided with an internal thread that matches the second external thread; the tail of the tool holder is provided with a concave hole with an internal thread that matches the first external thread; the head end of the variable pitch screw is threadedly connected to the concave hole of the tool holder, and the tail end is threadedly connected to the limiting receiving hole. The tail of the variable pitch screw is provided with a turning part. By rotating the variable pitch screw through the turning part, the tool holder is controlled to slide along the limiting receiving hole under the control of the first external thread.

6. The boring tool with precisely adjustable cutting amount of the cutting teeth according to claim 5, characterized in that, The limiting receiving hole includes a first hole and a second hole that are coaxially arranged and connected; the inner wall of the second hole is provided with an internal thread that matches the second external thread; the outer contour and size of the first hole are the same as the outer contour and size of the tool holder, which restricts the rotation of the tool holder in the first hole and guides the tool holder to slide along the first hole; The outer contour and dimensions of the tool holder are smaller than the contour and dimensions of the second hole.

7. The boring tool with precisely adjustable cutting amount of the cutting teeth according to claim 5, characterized in that, The screwing part includes an internal hexagonal groove, which is provided on the tail end face of the variable pitch screw.

8. The boring tool with precisely adjustable cutting amount of the cutting teeth according to claim 6, characterized in that, The tool holder has a sleeve hole, and a collar is provided in the sleeve hole. The collar is fixedly connected to the tool holder. The second hole is provided in the collar and passes through the collar.

9. The boring tool with precisely adjustable cutting amount of the cutting teeth according to claim 8, characterized in that, The sleeve hole is circular and coaxial with the first hole; The tool holder is provided with a second fastening hole with internal threads that communicates with the sleeve hole. The second fastening hole is directly opposite the collar. A second fastening screw is provided with the internal thread of the second fastening hole. The tail end of the second fastening screw can abut against the surface of the collar to fix the collar and the tool holder relative to each other.

10. The boring tool with precisely adjustable cutting amount of the cutting teeth according to any one of claims 1-9, characterized in that, The seat rod has two limiting receiving holes and two pitch control components; the two edge control components are respectively set in the two limiting receiving holes; the projections of the two limiting receiving holes on the axis of the shaft are rotationally symmetrical about the axis of the seat rod; the two limiting receiving holes are staggered in the axis of the seat rod.

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