Novel flat milling tool for shafts

Abstract

The utility model belongs to the technical field of shaft milling and flattening, and particularly relates to a novel shaft milling and flattening tool which comprises a groove-shaped tool body, a groove of the tool body forms a limiting groove and is used for clamping a to-be-machined shaft part, a screw hole penetrating through the tool body is formed in the side wall of the limiting groove, and the limiting groove is used for clamping the to-be-machined shaft part. The limiting bolt extends into the limiting groove along the screw hole to abut against the to-be-machined shaft part, and the limiting bolt and the limiting groove jointly clamp and fix the to-be-machined shaft part. The limiting bolt and the limiting groove are used for clamping the shaft part together, an adjustable clamping structure is formed, clamping and loosening of the shaft part are rapidly achieved by screwing the limiting bolt, and the clamping efficiency is remarkably improved; meanwhile, the limiting bolt is matched with the limiting groove in an abutting mode to form stable clamping, it is guaranteed that the part is reliably positioned in the flat milling process, and machining deviation caused by unstable clamping is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of shaft milling technology, specifically relating to a new type of shaft milling tool. Background Technology

[0002] In machining, milling flattening is a very common process for shaft parts, which makes part or the whole cross section of the shaft part into a D shape.

[0003] Current shaft fixtures are generally in the form of a hoop, which is used to clamp and lock the two ends of the shaft part to be processed. However, the clamping process of this fixture is time-consuming and labor-intensive. Moreover, when milling flattening one side of the shaft part, it is necessary to first mill flatten a part of the shaft part, then move the shaft part to expose the area previously clamped by the fixture again, and then mill flatten it again. It is impossible to mill flatten it in one go, resulting in low processing efficiency. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a novel shaft milling fixture. It utilizes a limiting bolt and a limiting groove to clamp shaft parts, forming an adjustable clamping structure. By tightening the limiting bolt, the clamping and loosening of shaft parts can be quickly achieved, significantly improving clamping efficiency. At the same time, the abutting action of the limiting bolt and the limiting groove form a stable clamping, ensuring reliable positioning of the parts during the milling process and avoiding machining deviations caused by unstable clamping.

[0005] The specific technical solution adopted in this utility model is as follows:

[0006] A novel shaft milling fixture includes a groove-shaped fixture body. The groove of the fixture body is formed into a limiting groove for clamping the shaft part to be processed. A threaded hole penetrating the fixture body is provided on the side wall of the limiting groove. A limiting bolt extends into the limiting groove along the threaded hole, abuts against the shaft part, and clamps and fixes the shaft part together with the limiting groove. The processed end of the shaft part extends out of the limiting groove.

[0007] The side of the limiting groove away from the screw hole has a concave arc-shaped structure. The surface of the arc-shaped structure, the bottom of the limiting groove, and the end of the limiting bolt respectively abut against the shaft part and form a three-point clamping. The three points clamping the shaft part are connected to form a triangle that surrounds the center of the cross-section of the shaft part.

[0008] The tooling body has a split structure. The area on the side of the tooling body away from the screw hole is the adjustment part. The adjustment part is connected to the tooling body by means of a telescopic mechanism. The adjustment part has the freedom to extend and retract along the x-axis by means of the telescopic mechanism. The x-axis is perpendicular to the plane where the bottom of the limiting groove is located.

[0009] The telescopic mechanism includes a telescopic rod and a fastener. The telescopic rod is disposed between the adjustment part and the tooling body along the x-axis. The tooling body is provided with an adjustment hole for inserting the telescopic rod. One end of the telescopic rod is fixedly connected to the adjustment part, and the other end of the telescopic rod has the freedom to extend and retract along the adjustment hole. The fastener is located inside the tooling body and has the freedom to clamp and release the telescopic rod. The telescopic rod is fixed by means of the clamping of the fastener.

[0010] The fastener includes a first limiting sleeve, a second limiting sleeve, and an adjusting bolt. The sides of the contact ends of the first and second limiting sleeves are symmetrically arc-shaped and spliced ​​together to form an arc-shaped groove structure. The telescopic rod passes through the arc-shaped groove structure and is clamped by the arc-shaped groove structure. The limiting end of the adjusting bolt is located inside the first limiting sleeve and forms a sleeve fit with the first limiting sleeve. The free end of the adjusting bolt passes through the second limiting sleeve and forms a threaded connection with the second limiting sleeve. The first limiting sleeve has the freedom to move closer to or further away from the second limiting sleeve by means of the adjusting bolt.

[0011] The first limiting sleeve has a T-shaped cross-section, and the adjusting bolt has a T-shaped structure that matches the cavity of the first limiting sleeve. The wider head of the adjusting bolt and the second limiting sleeve together clamp the first limiting sleeve and form a clamping and fixing.

[0012] The tooling body is provided with a blind hole-shaped adjustment channel. The plane of the adjustment channel is perpendicular to the plane of the adjustment hole. The side wall of the adjustment channel intersects and communicates with the side wall of the adjustment hole. The first limiting sleeve is located on the deep side of the adjustment channel and has the freedom to move along the adjustment channel. The second limiting sleeve is located on the open side of the adjustment channel and is fixedly connected to the tooling body.

[0013] The surface of the telescopic rod is provided with friction texture, and the arc-shaped surface of the first limiting sleeve is provided with texture that cooperates with the friction texture. The first limiting sleeve hinders the movement of the telescopic rod by means of the friction texture.

[0014] The free end of the adjusting bolt passes through the second limiting sleeve and protrudes outside the tooling body, and a handle is sleeved on the outside of the free end of the adjusting bolt.

[0015] The beneficial effects of this utility model are:

[0016] 1. This utility model utilizes the limiting bolt and the limiting groove to clamp shaft parts together, forming an adjustable clamping structure. Compared with the traditional hoop-shaped clamps that require cumbersome connection and multiple adjustments, this structure can quickly clamp and release shaft parts by turning the limiting bolt, significantly improving clamping efficiency. At the same time, the limiting bolt and the limiting groove form a stable three-point clamping, ensuring reliable positioning of the parts during milling and avoiding machining deviations caused by unstable clamping.

[0017] 2. The adjustment part in this utility model is telescopic by means of a telescopic mechanism, which solves the problem of poor versatility of traditional fixtures. It can adapt to shaft parts of different diameters by adjusting the side wall length of the limiting groove, without the need to change the tooling for different sizes, thus significantly improving the applicability of the tooling. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction;

[0020] Figure 3 This is a schematic diagram of the telescopic mechanism when it is locked.

[0021] Figure 4 for Figure 3 An enlarged schematic diagram of part A in the middle;

[0022] Figure 5 A side view of the telescopic mechanism when locked;

[0023] Figure 6 A schematic diagram of the telescopic mechanism when it is open;

[0024] Figure 7 for Figure 6 Enlarged schematic diagram of part B;

[0025] Figure 8 A side view of the telescopic mechanism when it is open;

[0026] Figure 9 This is a schematic diagram of the telescopic rod structure;

[0027] In the attached diagram, 1 is the main body of the tooling, 2 is the limiting groove, 3 is the shaft part, 4 is the limiting bolt, 5 is the adjusting part, 6 is the telescopic rod, 7 is the adjusting hole, 8 is the first limiting sleeve, 9 is the second limiting sleeve, 10 is the adjusting bolt, 11 is the adjusting channel, 12 is the friction texture, 13 is the handle, 14 is the limiting rod, and 15 is the limiting hole. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0029] Specific embodiment 1, such as Figure 1-2As shown, this utility model provides a novel shaft milling fixture, including a fixture body 1 in the shape of a groove. The groove of the fixture body 1 is formed into a limiting groove 2 for clamping the shaft part 3 to be processed. A threaded hole penetrating the fixture body 1 is provided on the side wall of the limiting groove 2. A limiting bolt 4 extends into the limiting groove 2 along the threaded hole, abuts against the shaft part 3, and clamps and fixes the shaft part 3 together with the limiting groove 2. The processed end of the shaft part 3 extends out of the limiting groove 2.

[0030] Current shaft fixtures are generally in the form of a hoop. The hoop is used to connect and lock the two ends of the shaft part 3 to be processed to form a clamping and fixing. However, the clamping process of this fixture is time-consuming and labor-intensive. When milling flattening one side of the shaft part 3, it is necessary to first mill flatten a part of the shaft part 3, and then move the shaft part 3 to expose the area previously clamped by the fixture again, and then mill flatten it again. It is impossible to mill flatten it in one go, resulting in low processing efficiency.

[0031] Therefore, this utility model utilizes the limiting bolt 4 and the limiting groove 2 to clamp the shaft part 3, forming an adjustable clamping structure. Compared with the traditional hoop-shaped clamps that require cumbersome fitting and multiple adjustments, this structure can quickly clamp and release the shaft part 3 by turning the limiting bolt 4, significantly improving clamping efficiency. At the same time, the abutting action of the limiting bolt 4 with the limiting groove 2 forms a stable clamping, ensuring reliable positioning of the part during milling and avoiding machining deviations caused by unstable clamping.

[0032] Furthermore, the portion of the shaft-type part 3 exposed outside the limiting groove 2 is not held by a fixture, so it can be milled flat in one go, effectively improving processing efficiency.

[0033] like Figure 2 As shown, the side of the limiting groove 2 away from the screw hole has a concave arc-shaped structure. The surface of the arc-shaped structure, the bottom of the limiting groove 2, and the end of the limiting bolt 4 respectively abut against the shaft part 3 and form a three-point clamping. The three points clamping the shaft part 3 form a triangle that surrounds the center of the cross-section of the shaft part 3. This design ensures that the shaft part 3 is subjected to a uniform clamping force in the circumference, avoiding the tilting or rotation of the part that may be caused by single-point clamping or two-point clamping, and improving clamping stability and positioning accuracy.

[0034] Specific embodiment 2 differs from specific embodiment 1 only in that the position of the adjusting part 5 is adjustable in specific embodiment 2. Figure 3-8 As shown, the tooling body 1 has a split structure. The area on the side of the tooling body 1 away from the screw hole is the adjustment part 5. The adjustment part 5 is connected to the tooling body 1 by means of a telescopic mechanism. The adjustment part 5 has the freedom to extend and retract along the x-axis by means of the telescopic mechanism. The x-axis is perpendicular to the plane where the bottom of the limiting groove 2 is located.

[0035] Specific embodiment 2 solves the problem of poor versatility of traditional fixtures. By adjusting the side wall length of the limiting groove 2, it can adapt to shaft parts 3 of different diameters without changing the tooling for different sizes, thus significantly improving the applicability of the tooling.

[0036] The telescopic mechanism includes a telescopic rod 6 and a fastener. The telescopic rod 6 is positioned between the adjusting part 5 and the tooling body 1 along the x-axis. The tooling body 1 has an adjusting hole 7 for inserting the telescopic rod 6. One end of the telescopic rod 6 is fixedly connected to the adjusting part 5, and the other end of the telescopic rod 6 has the freedom to extend and retract along the adjusting hole 7. The fastener is located inside the tooling body 1 and has the freedom to clamp and release the telescopic rod 6. The telescopic rod 6 is fixed by the clamping of the fastener. This structure makes the position adjustment process of the adjusting part 5 simple and controllable. The clamping function of the fastener ensures the positional accuracy after adjustment, guarantees the stability and reliability of the clamping structure, and thus improves the machining accuracy of the shaft parts 3 to be processed.

[0037] The fastener includes a first limiting sleeve 8, a second limiting sleeve 9, and an adjusting bolt 10. The sides of the contact ends of the first limiting sleeve 8 and the second limiting sleeve 9 are symmetrical arc-shaped and spliced ​​to form an arc-shaped groove structure. The telescopic rod 6 passes through the arc-shaped groove structure and is clamped by the arc-shaped groove structure. The limiting end of the adjusting bolt 10 is located inside the first limiting sleeve 8 and forms a sleeve fit with the first limiting sleeve 8. The free end of the adjusting bolt 10 passes through the second limiting sleeve 9 and forms a threaded connection with the second limiting sleeve 9. The first limiting sleeve 8 has the freedom to move closer to or further away from the second limiting sleeve 9 by means of the adjusting bolt 10.

[0038] The first limiting sleeve 8 has a T-shaped cross-section, and the adjusting bolt 10 has a T-shaped structure that matches the cavity of the first limiting sleeve 8. The wider head of the adjusting bolt 10 and the second limiting sleeve 9 together clamp the first limiting sleeve 8 and form a clamping and fixing.

[0039] The tooling body 1 is provided with an adjustment channel 11 in the shape of a blind hole. The plane of the adjustment channel 11 is perpendicular to the plane of the adjustment hole 7. The side wall of the adjustment channel 11 intersects and communicates with the side wall of the adjustment hole 7. The first limiting sleeve 8 is located on the deep side of the adjustment channel 11 and has the freedom to move along the adjustment channel 11. The second limiting sleeve 9 is located on the opening side of the adjustment channel 11 and is fixedly connected to the tooling body 1.

[0040] When the size of the shaft part 3 to be processed is large, it cannot enter the limiting groove 2, such as Figure 6 As shown by the circular dashed line 3 in the figure, it is necessary to adjust the position of the adjustment part 5 to increase the filling size range of the limit groove 2.

[0041] like Figure 6-8As shown, when the position of the adjusting part 5 needs to be adjusted, the adjusting bolt 10 is rotated. Since the position of the second limiting sleeve 9 is fixed and the first limiting sleeve 8 and the second limiting sleeve 9 do not rotate together with the adjusting bolt 10, the wider head of the adjusting bolt 10 will gradually move away from the narrow opening of the first limiting sleeve 8, so that the first limiting sleeve 8 has the freedom to move away from the second limiting sleeve 9. At this time, the groove structure formed by the first limiting sleeve 8 and the second limiting sleeve 9 will separate and cannot effectively clamp the telescopic rod 6. At this time, the telescopic rod 6 can freely extend and retract, and the extension length can be adjusted according to the diameter of the shaft part 3.

[0042] like Figure 3-5 As shown, when the adjusting part 5 is adjusted to the desired position, the adjusting bolt 10 is rotated in the opposite direction. The wider head of the adjusting bolt 10 will gradually approach the narrow opening of the first limiting sleeve 8 and form abutment. As the adjusting bolt 10 is rotated in the opposite direction, since the position of the second limiting sleeve 9 is fixed, the head of the adjusting bolt 10 and the second limiting sleeve 9 will clamp the first limiting sleeve 8, so that the groove structure formed by the first limiting sleeve 8 and the second limiting sleeve 9 will close again and effectively clamp the telescopic rod 6. At this time, the position of the telescopic rod 6 is fixed and cannot be extended or retracted. Thus, the position of the adjusting part 5 is fixed, and the position adjustment is completed.

[0043] like Figure 9 As shown, the surface of the telescopic rod 6 is provided with friction texture 12, and the arc-shaped surface of the first limiting sleeve 8 is provided with textures that cooperate with the friction texture 12. The first limiting sleeve 8 uses the friction texture 12 to hinder the movement of the telescopic rod 6. When the groove structure formed by the first limiting sleeve 8 and the second limiting sleeve 9 recloses and clamps the telescopic rod 6, the texture on the surface of the first limiting sleeve 8 will cooperate with the friction texture 12, increasing the friction system between the two, thereby hindering the movement of the telescopic rod 6 along the adjusting hole 7.

[0044] The free end of the adjusting bolt 10 passes through the second limiting sleeve 9 and protrudes outside the tooling body 1. A handle 13 is sleeved on the outside of the free end of the adjusting bolt 10, which facilitates the operator to rotate the adjusting bolt 10.

[0045] like Figure 3 and Figure 6 As shown, the adjustment part 5 is also provided with a limit rod 14, and the tooling body 1 is provided with a limit hole 15 that cooperates with the limit rod 14. The limit hole 15 and the adjustment hole 7 are arranged parallel to each other along the direction of the limit bolt 4. The limit rod 14 and the telescopic rod 6 are arranged parallel to each other along the direction of the limit bolt 4. The limit rod 14 and the telescopic rod 6 cooperate to provide a stable guiding effect and avoid shaking or deviation during adjustment.

[0046] In another specific embodiment 2, the tooling body 1 includes a support part. The support part and the limiting bolt 4 are located on both sides of the limiting groove 2. The support part is used to support the adjustment part 5. Since the adjustment part 5 will be subjected to external force when the limiting bolt 4 abuts against the shaft part 3, but the limiting rod 14 and the telescopic rod 6 are prone to breakage when subjected to large external force, the support part is provided to bear this part of the external force and avoid the limiting rod 14 and the telescopic rod 6 being subjected to external force perpendicular to themselves.

Claims

1. A novel shaft milling fixture, comprising a fixture body (1) in the shape of a groove, wherein the groove of the fixture body (1) is formed as a limiting groove (2) and used to clamp the shaft part (3) to be processed, characterized in that, The side wall of the limiting groove (2) is provided with a screw hole that penetrates the tooling body (1). The limiting bolt (4) extends into the limiting groove (2) along the screw hole to abut against the shaft part (3) and together with the limiting groove (2) clamps and fixes the shaft part (3). The machined end of the shaft part (3) extends out of the limiting groove (2).

2. The novel shaft milling fixture according to claim 1, characterized in that, The side of the limiting groove (2) away from the screw hole has a concave arc-shaped structure. The surface of the arc-shaped structure, the bottom of the limiting groove (2) and the end of the limiting bolt (4) respectively abut against the shaft part (3) and form a three-point clamping. The three points clamping the shaft part (3) are connected to form a triangle that surrounds the center of the cross-section of the shaft part (3).

3. The novel shaft milling fixture according to claim 1, characterized in that, The tooling body (1) has a split structure. The area on the side of the tooling body (1) away from the screw hole is the adjustment part (5). The adjustment part (5) is connected to the tooling body (1) by means of a telescopic mechanism. The adjustment part (5) has the freedom to extend and retract along the x-axis by means of the telescopic mechanism. The x-axis is perpendicular to the plane where the bottom of the limiting groove (2) is located.

4. A novel shaft milling fixture according to claim 3, characterized in that, The telescopic mechanism includes a telescopic rod (6) and a fastener. The telescopic rod (6) is arranged between the adjustment part (5) and the tooling body (1) along the x-axis. The tooling body (1) is provided with an adjustment hole (7) for the telescopic rod (6) to be inserted. One end of the telescopic rod (6) is fixedly connected to the adjustment part (5), and the other end of the telescopic rod (6) has the freedom to extend and retract along the adjustment hole (7). The fastener is located inside the tooling body (1) and has the freedom to clamp the telescopic rod (6) and release it. The telescopic rod (6) is fixed by means of the clamping of the fastener.

5. A novel shaft milling fixture according to claim 4, characterized in that, The fastener includes a first limiting sleeve (8), a second limiting sleeve (9), and an adjusting bolt (10). The sides of the contact ends of the first limiting sleeve (8) and the second limiting sleeve (9) are symmetrical arc-shaped and spliced ​​to form an arc-shaped groove structure. The telescopic rod (6) passes through the arc-shaped groove structure and is clamped by the arc-shaped groove structure. The limiting end of the adjusting bolt (10) is located inside the first limiting sleeve (8) and forms a sleeve fit with the first limiting sleeve (8). The free end of the adjusting bolt (10) passes through the second limiting sleeve (9) and forms a threaded connection with the second limiting sleeve (9). The first limiting sleeve (8) has the freedom to move closer to or further away from the second limiting sleeve (9) by means of the adjusting bolt (10).

6. A novel shaft milling fixture according to claim 5, characterized in that, The first limiting sleeve (8) has a T-shaped cross-section, and the adjusting bolt (10) has a T-shaped structure that matches the cavity of the first limiting sleeve (8). The wider head of the adjusting bolt (10) and the second limiting sleeve (9) together clamp the first limiting sleeve (8) and form a clamping and fixing.

7. A novel shaft milling fixture according to claim 5, characterized in that, The tooling body (1) is provided with an adjustment channel (11) in the shape of a blind hole. The plane of the adjustment channel (11) is perpendicular to the plane of the adjustment hole (7). The side wall of the adjustment channel (11) intersects and communicates with the side wall of the adjustment hole (7). The first limiting sleeve (8) is located on the deep side of the adjustment channel (11) and has the freedom to move along the adjustment channel (11). The second limiting sleeve (9) is located on the opening side of the adjustment channel (11) and is fixedly connected to the tooling body (1).

8. A novel shaft milling fixture according to claim 5, characterized in that, The surface of the telescopic rod (6) is provided with friction texture (12), and the arc surface of the first limiting sleeve (8) is provided with texture that matches the friction texture (12). The first limiting sleeve (8) uses the friction texture (12) to hinder the movement of the telescopic rod (6).

9. A novel shaft milling fixture according to claim 5, characterized in that, The free end of the adjusting bolt (10) passes through the second limiting sleeve (9) and protrudes outside the tooling body (1). A handle (13) is sleeved on the outside of the free end of the adjusting bolt (10).

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