Cutter clamping sleeve

Abstract

A cutter clamp sleeve comprises a positioning clamp with an axial through hole and a tensioning piece, the upper end of the positioning clamp is provided with a B datum plane, the clamp wall of the positioning clamp is provided with at least one upper open groove and at least one lower open groove, and the upper open grooves and the lower open grooves are arranged in a staggered mode so that the positioning clamp can form an elastic body. The tensioning piece is arranged outside the clamping wall of the positioning clamp in a sleeving mode, and the positioning clamp and the tensioning piece are coaxially arranged and jointly used for clamping a tool. The utility model has the advantages that the cutter clamping sleeve is not easy to shake or loosen, the cutter does not shake or shift, the processing accuracy is higher, the structure is more compact and small, and the cutter swing is smaller during high-speed and high-precision processing.

Description

Technical Field

[0001] The utility model relates to the field of tool clamp sleeves, in particular to a tool clamp sleeve. Background Art

[0002] Automatic tool change in CNC milling machining requires pre-installing the tool on the tool holder or tool holder in advance. If each tool can accurately and reliably fix the relative position reference between the tool and the tool holder during pre-installation, the tool change process can be achieved without tool alignment.

[0003] Chinese patent document CN 216503492 U discloses a high-stability clamping sleeve, comprising a clamping sleeve body; an elastic clamping plate arranged in the clamping sleeve body, the elastic clamping plate having a clamping wall arranged inwardly; and a locking member penetrating the clamping sleeve body and abutting against the elastic clamping plate; the elastic clamping plate is deformed by rotating the locking member, and the shaft passing through the clamping sleeve body is clamped by the clamping wall.

[0004] However, the positioning sleeve used for accurately fixing shaft products in the above-mentioned prior art has the following defects during actual use: first, during use, especially under high-speed rotation, the structure of the positioning sleeve is easy to loosen, causing the positioning sleeve to move up and down, affecting the accuracy of processing; second, the volume of the sleeve is still not small enough, and it is difficult to control the tool swing caused by centrifugal force during high-speed and high-precision processing, thereby affecting the processing accuracy. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a tool holder sleeve which is not prone to shaking or loosening, the knife will not shake or shift, the processing accuracy is higher, the structure is more compact and small, and the tool swing is smaller during high-speed and high-precision processing.

[0006] The technical solution of the utility model is: to provide a tool clamp sleeve, including a positioning clamp with an axial through hole and a tensioning member, the upper end of the positioning clamp is provided with a B reference surface, the clamping wall of the positioning clamp is provided with at least one upper opening groove and at least one lower opening groove, the upper opening groove and the lower opening groove are staggered so that the positioning clamp forms an elastic body, the tensioning member is sleeved outside the clamping wall of the positioning clamp, the positioning clamp and the tensioning member are coaxially arranged and are used together to clamp the tool.

[0007] As an improvement of the present invention, the tensioning member is a tensioning nut, the lower and middle part of the clamping wall of the positioning clamp is provided with an external thread, the tensioning nut is sleeved outside the clamping wall of the positioning clamp, the tensioning nut is provided with an internal thread matching the external thread, the positioning clamp and the tensioning nut are coaxially arranged and are used together to clamp the tool.

[0008] As an improvement of the utility model, the upper opening groove extends downward from the upper end surface of the positioning clamp to a position close to the lower end surface of the positioning clamp, and the lower opening groove extends upward from the lower end surface of the positioning clamp to a position close to the upper end surface of the positioning clamp.

[0009] As an improvement of the present utility model, the positioning clamp comprises a clamp cap portion and a clamp body portion, and the outer diameter of the clamp body portion gradually increases from bottom to top to form a tapered surface.

[0010] As an improvement of the present invention, the inner wall of the tension nut is a conical inner wall matching the conical surface of the clamping body.

[0011] As an improvement of the present utility model, the clamp cap portion is a convex ring structure, and the outer diameter of the clamp cap portion is greater than the outer diameter of the clamp body portion.

[0012] As an improvement of the present utility model, the clamp cap portion and the clamp body portion are integrally formed.

[0013] As an improvement of the present invention, the material of the positioning clip is manganese-titanium hardened steel or other high-hardness and high-elasticity composite materials.

[0014] As an improvement of the present utility model, the number of the at least one upper opening groove is 1 to 5.

[0015] As an improvement of the present utility model, the number of the at least one lower opening groove is 1 to 5.

[0016] As an improvement of the present invention, the outer wall of the tension nut is provided with at least two grooves, and the at least two grooves are arranged around the outer wall of the tension nut at a predetermined interval.

[0017] The utility model comprises a positioning clamp and a tensioning member with an axial through hole, the upper end of the positioning clamp is provided with a B reference surface, the clamp wall of the positioning clamp is provided with at least one upper opening groove and at least one lower opening groove, the upper opening groove and the lower opening groove are staggered so that the positioning clamp forms an elastic body, the tensioning member is sleeved outside the clamp wall of the positioning clamp, the positioning clamp and the tensioning member are coaxially arranged and are used together to clamp the tool. When the utility model is used, the positioning clamp is first fixed. Since the upper end surface of the positioning clamp is provided with a B reference surface, the relative position of the B reference surface and the matching piece is fixed, so that the knife alignment can be avoided. Then the knife is placed in the fixed positioning clamp so that the relative distance between the E reference surface of the bottom surface of the knife and the B reference surface reaches a predetermined distance. Then the tensioning piece is sleeved on the clamp wall of the positioning clamp, and the tensioning piece is screwed upward to move the tensioning piece upward, thereby pushing the positioning clamp to retract until the inner wall of the positioning clamp is completely tightly held on the knife surface. In the utility model, since the upper opening groove and the lower opening groove are staggered, the retracted movement of the positioning clamp is always equidistant in the radial direction of the knife, and is The locked positioning clamp B reference surface and the knife axis A reference ensure a high degree of verticality, so that during use, even at high speed, the tool holder will not shake or loosen. In this way, not only can the B reference surface always remain horizontal, but the knife will not shake or shift. In this way, the distance between the B reference surface and the E reference surface can always remain consistent. Even if the clamping is repeated, the distance between the B reference surface and the E reference surface can be basically consistent each time. In addition, in the utility model, the tool holder has fewer parts and a more compact structure. During high-speed and high-precision processing, the centrifugal force is smaller, the knife swing is smaller, and the processing accuracy is better. Therefore, the utility model has the advantages that the tool holder is not easy to shake or loosen, the knife will not shake or shift, the processing accuracy is higher, the structure is more compact, and the knife swing is smaller during high-speed and high-precision processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a three-dimensional exploded structure of an implementation method of the utility model.

[0019] Figure 2 yes Figure 1 A front view schematic diagram of .

[0020] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure after complete assembly.

[0021] Figure 4 yes Figure 3 Schematic diagram of the front view.

[0022] Figure 5 yes Figure 4 Top view of the .

[0023] Figure 6 yes Figure 5 Schematic cross-sectional view in the AA direction. DETAILED DESCRIPTION

[0024] See also Figures 1 to 6 , Figures 1 to 6Disclosed is an embodiment of a tool clamp sleeve, which includes a positioning clamp 1 with an axial through hole 100 and a tensioning member 2, the upper end of the positioning clamp 1 is provided with a B reference surface, the clamp wall 10 of the positioning clamp 1 is provided with at least one upper open groove 11 and at least one lower open groove 12, the upper open groove 11 and the lower open groove 12 are staggered so that the positioning clamp 1 forms an elastic body, the tensioning member 2 is sleeved outside the clamp wall 10 of the positioning clamp 1, the positioning clamp 1 and the tensioning member 2 are coaxially arranged and are commonly used to clamp the tool 4, in this embodiment, specifically, the tensioning member 2 is a tensioning nut, the middle and lower part of the clamp wall 10 of the positioning clamp 1 is provided with an external thread 160, the tensioning nut is sleeved outside the clamp wall 10 of the positioning clamp 1, the tensioning nut is provided with an internal thread matching the external thread 160, the positioning clamp 1 and the tensioning nut 2 are coaxially arranged and are commonly used to clamp the tool 4. When the utility model is used, the positioning clamp 1 is first fixed, specifically, the positioning clamp 1 is placed in a matching body (not shown in the figure). Since the upper end surface of the positioning clamp 1 is provided with a B reference surface, the relative position of the B reference surface and the matching piece is fixed, so that the knife 4 can be avoided, and the relative position can be guaranteed to remain unchanged during subsequent repeated clamping; then the knife 4 is axially placed in the through hole 100 of the fixed positioning clamp 1, so that the relative distance between the E reference surface on the bottom surface of the knife 4 and the B reference surface reaches a predetermined distance (in the utility model, the predetermined distance can be set according to actual use requirements, and the utility model is not limited thereto), and then the tensioning nut 2 is sleeved on the clamping wall 10 of the positioning clamp 1, and the tensioning nut 2 is screwed upward, and the tensioning nut 2 moves upward along the clamping wall 10, thereby causing the tensioning nut 2 to move upward, and since the positioning clamp 1 is an elastic body with two upper opening grooves 11 and two lower opening grooves 12, the upward push of the tensioning nut 2 will push the positioning clamp 1 to retract until the inner wall of the positioning clamp 1 is completely tightly hugged to the outer wall surface of the knife 4. In the utility model, since the upper opening groove 11 and the lower opening groove 12 are staggered, the positioning clamp 1 can be completely and equally retracted or opened in the radial direction, so that the tool 4 can smoothly enter the positioning clamp 1 with the center of gravity always at the center of the axis. The retracted movement of the positioning clamp 1 is always equidistant in the radial direction of the tool 4. The B reference surface of the locked positioning clamp 1 and the axis A reference of the tool 4 ensure a high verticality. In this way, during use, even at high speed, the tool clamp sleeve will not shake or loosen, and the tool 4 is clamped very firmly. In this way, not only can the B reference surface always remain horizontal, but the tool 4 will not shake or shift. In this way, the distance between the B reference surface and the E reference surface can always remain consistent. Even if the clamping is repeated, the distance between the B reference surface and the E reference surface can be basically consistent each time, so that the accuracy of the repeated clamping processing can be guaranteed. In addition, in the utility model, the tool clamp sleeve has fewer parts and a more compact and compact structure. During high-speed and high-precision processing, the centrifugal force is smaller, the tool swing is smaller, and the processing accuracy is better.

[0025] In the utility model, preferably, the upper opening groove 11 extends downward from the upper end face 13 of the positioning clamp to a position close to the lower end face 14 of the positioning clamp, and the lower opening groove 12 extends upward from the lower end face 14 of the positioning clamp to a position close to the upper end face 13 of the positioning clamp, and the upper opening groove 11 and the lower opening groove 12 are staggered, so that it can be ensured that the positioning clamp 1 can be completely and equally retracted or opened radially.

[0026] In the present invention, preferably, the positioning clamp 1 includes a clamp cap portion 15 and a clamp body portion 16, the outer diameter of the clamp body portion 16 gradually increases from bottom to top to form a conical surface, and the inner wall 22 of the tensioning nut is a conical inner wall that matches the conical surface of the clamp body portion 16. The advantage of such a design is that the conical surface of the clamp body portion 16 matches the conical inner wall of the tensioning nut, and during the process of pushing the tensioning nut up, the outer surface of the clamp body portion 16 can be pressed, and the positioning clamp 1 retracts to hold the knife 4, so that the fixing effect of the tool clamp sleeve of the present invention is better.

[0027] In the present invention, preferably, the clamp cap portion 15 is a convex ring structure, and the outer diameter of the clamp cap portion 15 is greater than the outer diameter of the clamp body portion 16. Specifically, in the present invention, the clamp cap portion 15 and the clamp body portion 16 are integrally formed.

[0028] In the present invention, preferably, the material of the positioning clamp 1 is manganese-titanium hardened steel or other high-hardness and high-elasticity composite materials. The advantage of using manganese-titanium hardened steel is that it can ensure that the positioning clamp 1 has good elasticity; in addition, in the present invention, in order to ensure that the center of gravity of the tool holder sleeve itself is highly consistent with the axis center, the positioning clamp 1 and the tightening nut can all be processed by high-precision CNC lathes.

[0029] In the utility model, preferably, the outer wall of the tensioning nut is provided with at least two grooves 23, and at least two of the grooves 23 are arranged around the outer wall of the tensioning nut at a predetermined interval. In this embodiment, there are four grooves 23, and the function of the grooves 23 is to prevent slipping, so that the friction force of the tensioning nut can be increased when rotating, and the tightening effect is better.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A tool holder, characterized in that: The invention comprises a positioning clamp (1) having an axial through hole (100) and a tensioning member (2), wherein the upper end of the positioning clamp (1) is provided with a B reference surface, the clamp wall (10) of the positioning clamp (1) is provided with at least one upper opening groove (11) and at least one lower opening groove (12), the upper opening groove (11) and the lower opening groove (12) are arranged in a staggered manner so that the positioning clamp (1) forms an elastic body, the tensioning member (2) is sleeved outside the clamp wall (10) of the positioning clamp (1), and the positioning clamp (1) and the tensioning member (2) are coaxially arranged and are used together to clamp a tool (4).

2. The tool holder according to claim 1, characterized in that: The tensioning member (2) is a tensioning nut. An external thread (160) is provided at a middle and lower portion of the clamp wall (10) of the positioning clamp (1). The tensioning nut is sleeved outside the clamp wall (10) of the positioning clamp (1). The tensioning nut is provided with an internal thread matching the external thread (160). The positioning clamp (1) and the tensioning nut are coaxially arranged and are used together to clamp the tool (4).

3. The tool holder according to claim 2, characterized in that: The upper opening groove (11) extends downward from the upper end surface (13) of the positioning clamp to a position close to the lower end surface (14) of the positioning clamp, and the lower opening groove (12) extends upward from the lower end surface (14) of the positioning clamp to a position close to the upper end surface (13) of the positioning clamp.

4. The tool holder according to claim 1, characterized in that: The positioning clamp (1) comprises a clamp cap portion (15) and a clamp body portion (16); the outer diameter of the clamp body portion (16) gradually increases from bottom to top to form a conical surface.

5. The tool holder according to claim 2, characterized in that: The inner wall (22) of the tension nut is a conical inner wall that matches the conical surface of the clamping body (16).

6. The tool holder according to claim 4, characterized in that: The clamp cap portion (15) is a convex ring structure, and the outer diameter of the clamp cap portion (15) is greater than the outer diameter of the clamp body portion (16).

7. The tool holder according to claim 6, characterized in that: The clamp cap portion (15) and the clamp body portion (16) are integrally formed.

8. The tool holder according to claim 1, characterized in that: The material of the positioning clip (1) is manganese-titanium hardened steel.

9. The tool holder according to claim 1, characterized in that: The number of the at least one upper opening groove (11) is 1 to 5.

10. The tool holder according to claim 1, characterized in that: The number of the at least one lower opening groove (12) is 1 to 5.

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