Grooving cutter

Abstract

The utility model discloses a grooving cutter which is used for machining an annular tool withdrawal groove around the inner cavity wall of a workpiece by a circle and comprises a cutter handle and a cutter body connected with the cutter handle, and the cutter body is provided with a first cutting edge used for machining the tool withdrawal groove and a second cutting edge used for machining a chamfer of the tool withdrawal groove. According to the grooving cutter, the first cutting edge used for machining the groove body of the tool withdrawal groove and the second cutting edge used for chamfering are integrated, the groove body and the chamfering of the tool withdrawal groove can be machined through one machining beat, the machining beat is reduced, the machining time is saved, and the machining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of workpiece processing tools, in particular to a grooving tool for processing a back-cut groove. Background Art

[0002] In lathe processing, such as turning inner holes and turning threads, in order to facilitate the withdrawal of the tool and to complete the process to the bottom of the blank, an empty groove for withdrawing the tool is often made in advance at the end of the surface to be processed, which is called a withdrawal groove. In the process of the withdrawal groove, the groove body of the withdrawal groove is first processed using a T-shaped grooving cutter, and then the T-shaped grooving cutter is replaced with a chamfering cutter, and the chamfering cutter is used to process the groove wall of the groove body. This results in the need to replace the tool during the withdrawal groove processing in order to process the required size in place. The two tools are prone to problems of mismatch during installation and debugging, which in turn results in poor chamfering processing position and dimensional accuracy. When the workpiece is subsequently assembled with other parts, the chamfer is prone to get stuck at the part, causing assembly difficulties and other problems, and also increases the processing cycle.

[0003] See also Figure 1 , Figure 1 This is a schematic diagram of the assembly of the undercut A100 and the component (spring seat A101) processed by the T-grooving cutter and chamfering cutter. Figure 2 , Figure 2 yes Figure 1 The enlarged view of the part A in the middle. Since the chamfering tool was not properly connected when it was replaced, the position of the processed chamfer A102 was deviated. When assembling the spring seat A101, the spring seat A101 was stuck at the chamfer A102 position and could not move down smoothly. If the spring seat A101 was pushed down by brute force, it would cause the spring seat A101 to deform or break. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a grooving tool which can improve the position accuracy of the chamfer and the backhoe groove and can process the backhoe groove and the chamfer at one time.

[0005] To solve the above technical problems, a technical solution adopted by the utility model is: providing a grooving tool, including a shank and a tool body connected to the shank, wherein the tool body is provided with a first blade for machining a back cutter groove and a second blade for machining the chamfer of the back cutter groove.

[0006] Furthermore, the blade body is a disc-shaped structure, the outer periphery of the blade body forms the first blade, the lower surface of the blade body forms a coaxial conical boss, the diameter of the conical boss gradually increases upwards, and the outer peripheral surface of the conical boss forms the second blade.

[0007] Furthermore, the diameter of the tool body is greater than the maximum diameter of the conical boss, the portion of the lower surface of the tool body surrounding the outer edge of the conical boss forms a first cutting surface of the first blade, the outer peripheral surface of the tool body forms a second cutting surface of the first blade, and the portion of the upper surface of the tool body corresponding to the first cutting surface forms a third cutting surface; the first cutting surface is used to form the lower side groove wall of the tool retreat groove, the second cutting surface is used to form the groove bottom wall of the tool retreat groove, and the third cutting surface is used to form the upper side groove wall of the tool retreat groove.

[0008] Furthermore, the second blade is inclined downward and toward the center, and the upper edge of the second blade is located on the inner side of the first cutting surface.

[0009] Furthermore, the diameter of the second cutting surface is 25 mm.

[0010] Furthermore, the vertical height of the second cutting surface is 2 mm.

[0011] Furthermore, the width of the first cutting surface in the radial direction is 1.5 mm.

[0012] Furthermore, the maximum diameter of the second blade is 23.5 mm, and the minimum diameter is 21 mm; the inclination angle of the second blade is 45 degrees.

[0013] Furthermore, the vertical distance between the convex surface of the conical boss and the lower surface of the blade body is 1.25 mm.

[0014] Furthermore, the knife handle is vertically connected to the upper surface of the knife body, and the knife handle, the knife body, the first blade and the second blade are integrally formed.

[0015] Compared with the prior art, the grooving tool of the utility model has at least the following beneficial effects: the grooving tool is integrated with a first blade for processing the groove body of the back cut groove and a second blade for chamfering, and the groove body and chamfer of the back cut groove can be processed in one processing cycle, thereby reducing the processing cycle, saving processing time, and improving processing efficiency; the first blade and the second blade are both arranged on a tool body, so that the setting positions of the first blade and the second blade correspond to the back cut groove and chamfer to be processed, and since the first blade and the second blade are integrally formed on the tool body, the relative positions of the first blade and the second blade are fixed, thereby solving the problem of the prior art that the tool cannot be connected in place due to the need to replace the chamfering tool, and then solving the problem of deviation in the chamfering processing position caused by the tool cannot be connected in place, making the chamfering processing position more accurate, so that the workpiece will not be stuck when it is subsequently assembled with other parts, thereby ensuring smooth assembly of the workpiece with other parts; the second blade and each cutting surface of the first blade are designed corresponding to the back cut groove and chamfer, thereby improving the processing accuracy of the back cut groove and chamfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 It is a schematic diagram of the assembly of the workpiece's back groove and parts processed by a T-shaped grooving cutter and a chamfering cutter.

[0018] Figure 2 yes Figure 1 Enlarged view of part A in the figure.

[0019] Figure 3 It is a schematic diagram of the structure after the tool groove and internal thread are machined on the inner wall of the workpiece.

[0020] Figure 4 yes Figure 3 Enlarged view of part B in the middle.

[0021] Figure 5 It is a structural schematic diagram of an implementation method of a grooving cutter of the utility model.

[0022] Figure 6 yes Figure 5 Sectional view of AA.

[0023] Figure 7 yes Figure 6 Enlarged view of part C in the middle.

[0024] Figure 8 It is a schematic diagram of the assembly of a workpiece with a back cutter groove and other components.

[0025] The accompanying drawings in the specification are numeraled as follows:

[0026] Back cutter groove A100; spring seat A101; chamfer A102;

[0027] Workpiece 100; inner cavity 110; cavity bottom wall 111; tool recess 120; chamfer 130; through hole 140; internal thread 150;

[0028] Grooving knife 200; knife handle 210; knife body 220; first blade 230; first cutting surface 231; second cutting surface 232; third cutting surface 233; second blade 241;

[0029] Spring 310 ; spring seat 320 ; stud 330 ; stopper 331 ; nut 340 ; limiting cylinder 350 ; outer edge 351 ; pressing ring 360 . DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0033] See also Figure 3 , Figure 3 It is a schematic diagram of the structure after the undercut groove 120 and the internal thread are processed on the inner cavity wall of the workpiece 100. The workpiece 100 has a cylindrical inner cavity 110, and the inner cavity 110 passes through one end of the workpiece 100 along the axial direction of the workpiece 100, and the through end forms an opening of the inner cavity 110, and the end of the inner cavity 110 away from the opening forms a cavity bottom wall 111 of the inner cavity 110. Figure 3 In the illustrated embodiment, the workpiece 100 is arranged in a vertical direction, the opening of the inner cavity 110 is located at the upper end of the workpiece 100 , and the bottom wall 111 of the inner cavity 110 is close to the lower end of the workpiece 100 .

[0034] The tool retreat groove 120 is located below the internal thread 150 and is distributed around the inner cavity wall to form an annular tool retreat groove. The end of the internal thread 150 is connected to the tool retreat groove 120. The tool retreat groove 120 is opened outward from the inner cavity wall, the groove opening of the tool retreat groove 120 faces inward, and the groove bottom faces the outer side of the workpiece 100. The side wall of the tool retreat groove 120 close to the opening (i.e., the side wall close to the internal thread 150) is the first side groove wall (upper side groove wall) of the tool retreat groove 120, and the side wall close to the cavity bottom wall 111 of the inner cavity 110 is the second side groove wall (lower side groove wall) of the tool retreat groove 120, and a chamfer 130 is provided at the connection between the lower side groove wall and the inner cavity wall.

[0035] See also Figure 4In the embodiment shown, the angle α between the chamfer 130 and the horizontal plane where the second side groove wall is located is 45 degrees. The distance from the bottom wall of the undercut groove 120 to the groove opening is 1.5 mm, the distance from the upper side groove wall to the lower side groove wall is 2 mm, and the distance from the horizontal plane where the lower edge of the chamfer 130 is located to the lower side groove wall is 1.25 mm. It should be understood that the size of the undercut groove 120 can be set according to the requirements of different embodiments and should not be limited by the above-mentioned size.

[0036] See also Figure 5 , Figure 5 Schematic diagram of the structure of a grooving cutter 200 of the utility model. Figure 3 The arrangement state of the workpiece 100 shown is adapted, and the grooving cutter 200 is also arranged in the vertical direction. It should be understood that in actual application, the directions of the workpiece 100 and the grooving cutter 200 may not be limited to the vertical direction shown in the drawings, for example, they may also be arranged obliquely, horizontally, etc. Correspondingly, the axial direction of the inner cavity 110, the axial direction of the workpiece 100, the opening direction of the inner cavity 110, etc. all change with the arrangement direction.

[0037] The grooving tool 200 is used to go around the inner wall of the workpiece 100 to machine the annular undercut 120, and the grooving tool 200 includes a tool handle 210 and a tool body 220 connected to the tool handle 210. The tool handle 210 is a columnar structure distributed in the vertical direction, and the tool body 220 is coaxially arranged at the lower end of the tool handle 210. The tool body 220 is preferably integrally formed with the tool handle 210. The blade body 220 is a disc-shaped structure, and its diameter is greater than the diameter of the blade handle 210. The upper surface of the blade body 220 is connected to the lower end of the blade handle 210. The blade body 220 is provided with a first blade 230 for processing the back cut groove 120 and a second blade 241 for processing the chamfer 130 of the back cut groove 120. The first blade 230 and the second blade 241 are formed on the outer periphery of the blade body 220 with a disc-shaped structure, and the first blade 230 and the second blade 241 are both integrally formed with the blade body 220.

[0038] A conical boss 240 is coaxially disposed on the lower surface of the cutter body 220, the diameter of the conical boss 240 gradually increases upward, and the maximum diameter of the conical boss 240 (the diameter of the top surface of the conical boss 240) is smaller than the outer diameter of the cutter body 220. On the axial projection of the grooving cutter 200 (i.e., the horizontal projection plane), the projection portion of the cutter body 220 that exceeds the conical boss 240 in the radial direction forms the first blade 230, and the inclined outer peripheral surface of the conical boss 240 forms the second blade 241.

[0039] See also Figure 6and Figure 7 The first blade body 220 is composed of the following parts: (1) a portion of the lower surface of the blade body 220 surrounding the conical boss 240, which forms the first cutting surface 231 of the first blade 230; (2) the outer peripheral surface (external elevation) of the blade body 220, which forms the second cutting surface 232 of the first blade 230; (3) a portion of the upper surface of the blade body 220 corresponding to the first cutting surface 231 (usually the portion of the upper surface of the blade body 220 aligned with the first cutting surface 231), which forms the third cutting surface 233 of the first blade 230. The first cutting surface 231 is used to form the lower groove wall of the retreat groove 120, the second cutting surface 232 is used to form the groove bottom wall of the retreat groove 120, and the third cutting surface 233 is used to form the upper groove wall of the retreat groove 120. The third cutting surface 233 and the first cutting surface 231 are annular cutting surfaces arranged opposite to each other.

[0040] Specifically, the width of the first cutting surface 231 and the third cutting surface 233 in the horizontal direction (radial direction) is limited to 1.5 mm, and the vertical height of the third cutting surface 233 is 2 mm. The second blade 241 is inclined downward and toward the center, and the upper edge of the second blade 241 is located on the inner side of the first cutting surface 231. The inclination angle of the second blade 241 is 45 degrees (that is, the angle between the second blade 241 and the horizontal plane where the first cutting surface 231 is located is 45 degrees). The diameter of the blade body 220 is limited to 25 mm, and the maximum diameter of the tapered boss 240 (that is, the diameter of the upper end face of the tapered boss 240) is 23.5 mm, thereby defining the width of the first cutting surface 231 and the third cutting surface 233 in the radial direction to be 1.5 mm. The minimum diameter of the conical boss 240 (the diameter of the lower convex surface of the conical boss 240 ) is 21 mm, and the vertical distance between the lower convex surface of the conical boss 240 and the lower surface of the blade body 220 is 1.25 mm.

[0041] See also Figure 8 , Figure 8 1 is a schematic diagram of assembling a workpiece 100 with a backing groove 120 and other parts. The workpiece 100 is used to cooperate with a spring 310, a spring seat 320, a stud 330, a nut 340, etc., to assemble the battery box on a car. It should be understood that Figure 8 This is only an exemplary embodiment, and is intended to illustrate the relationship between the undercut groove 120 machined in the workpiece 100 and the corresponding parts ( Figure 8 The spring seat 320 in the housing does not interfere. Figure 8In the embodiment, the workpiece 100 is defined as a mounting seat, one of the outer side walls of the mounting seat is connected to the battery box housing. The mounting seat has an inner cavity 110 arranged along its axial direction, and the inner cavity 110 passes through an axial end face ( Figure 8 The upper end surface of the mounting base is formed to form the opening of the inner cavity 110. The end of the mounting base ( Figure 8 The lower end of the inner cavity 110 is provided with a through hole 140 arranged in the axial direction, the upper end of the through hole 140 penetrates the bottom wall 111 of the inner cavity 110 to communicate with the inner cavity 110, and the lower end of the through hole 140 penetrates the lower end surface of the mounting seat. The upper section of the inner cavity wall of the inner cavity 110 is distributed with internal threads 150, and the position below the internal threads 150 on the inner cavity wall is a knife retreat groove 120, and the knife retreat groove 120 is Figure 5 The grooving cutter 200 shown is processed, and the thread cutter withdraws from the retreat groove 120 after processing the thread. In the embodiment of the utility model, the first blade 230 of the groove body for processing the retreat groove 120 and the second blade 241 for processing the chamfer 130 are integrated on the same cutter body 220, so that the grooving cutter 200 formed can solve the problem of the tool not being in place due to tool change in the traditional technology, and solve the problem of deviation in the processing position of the chamfering cutter.

[0042] The stud 330 is inserted into the through hole 140, and the lower end of the stud 330 extends downward through the lower end surface of the mounting seat to be screwed to the corresponding position on the car. The upper section of the stud 330 extends into the inner cavity 110, and a stopper 331 is provided on the stud 330 to prevent the stud 330 from falling downward. The outer periphery of the upper section of the stud 330 extending into the inner cavity 110 is surrounded by a spring 310, and the upper end of the spring 310 is pressed with the spring seat 320. A limiting cylinder 350 is provided above the spring seat 320, and the limiting cylinder 350 is sleeved on the outer periphery of the upper section of the stud 330. The outer periphery of the lower end of the limiting cylinder 350 is provided with an outer edge 351, and the upper surface of the outer edge 351 is abutted with a pressing ring 360, and the lower end of the pressing ring 360 presses the spring seat 320, and the pressing ring 360 is pressed by the lower end of the nut 340 threadedly engaged with the internal thread 150. The spring 310 is used to generate a pressing force between the nut 340 and the internal thread 150 in the vertical direction through its own elastic force, so as to prevent the nut 340 from moving slightly in the vertical direction. The spring seat 320 is located below the back cutter groove 120 after assembly. The back cutter groove 120 is formed by Figure 5After the grooving cutter 200 shown is processed, the chamfer 130 is accurately processed and will not interfere with the spring seat 320, thereby solving the problems of spring seat 320 installation jamming, spring seat 320 deformation, breakage, etc. caused by the position deviation of the chamfer 130, and ensuring the normal operation of the spring 310 and the spring seat 320 in the later stage.

[0043] In summary, compared with the prior art, the grooving tool of the utility model has at least the following beneficial effects: the grooving tool is integrated with a first blade for processing the groove body of the back cut groove and a second blade for chamfering, and the groove body and chamfer of the back cut groove can be processed in one processing cycle, thereby reducing the processing cycle, saving processing time, and improving processing efficiency; the first blade and the second blade are both arranged on a tool body, so that the setting positions of the first blade and the second blade correspond to the back cut groove and chamfer to be processed, and since the first blade and the second blade are integrally formed on the tool body, the relative positions of the first blade and the second blade are fixed, thereby solving the problem of the prior art that the tool cannot be connected in place due to the need to replace the chamfering tool, and then solving the problem of deviation in the chamfering processing position caused by the tool cannot be connected in place, thereby making the chamfering processing position more accurate, so that the workpiece will not be stuck when it is subsequently assembled with other parts, thereby ensuring smooth assembly of the workpiece with other parts; the second blade and each cutting surface of the first blade are designed corresponding to the back cut groove and chamfer, thereby improving the processing accuracy of the back cut groove and chamfer.

[0044] The above embodiments only express the preferred implementation of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A grooving tool, characterized in that: The invention is used for machining an annular tool retreat groove around the inner cavity wall of a workpiece, comprising a tool handle and a tool body connected to the tool handle, wherein the tool body is provided with a first blade for machining the tool retreat groove and a second blade for machining the chamfer of the tool retreat groove.

2. The grooving cutter according to claim 1, characterized in that: The blade body is a disc-shaped structure, the outer periphery of the blade body forms the first blade edge, the lower surface of the blade body forms a coaxial conical boss, the diameter of the conical boss gradually increases upwards, and the outer peripheral surface of the conical boss forms the second blade edge.

3. The grooving cutter according to claim 2, characterized in that: The diameter of the tool body is greater than the maximum diameter of the conical boss, the portion of the lower surface of the tool body surrounding the outer edge of the conical boss forms a first cutting surface of the first blade, the outer peripheral surface of the tool body forms a second cutting surface of the first blade, and the portion of the upper surface of the tool body corresponding to the first cutting surface forms a third cutting surface; the first cutting surface is used to form the lower side groove wall of the retreat groove, the second cutting surface is used to form the groove bottom wall of the retreat groove, and the third cutting surface is used to form the upper side groove wall of the retreat groove.

4. The grooving cutter according to claim 3, characterized in that: The second blade is inclined downward and toward the center, and the upper edge of the second blade is located on the inner side of the first cutting surface.

5. The grooving cutter according to claim 3, characterized in that: The diameter of the second cutting surface is 25 mm.

6. The grooving cutter according to claim 5, characterized in that: The vertical height of the second cutting surface is 2 mm.

7. The grooving cutter according to claim 3, characterized in that: The width of the first cutting surface in the radial direction is 1.5 mm.

8. The grooving cutter according to claim 3, characterized in that: The maximum diameter of the second blade is 23.5 mm, and the minimum diameter is 21 mm; the inclination angle of the second blade is 45 degrees.

9. The grooving cutter according to claim 2, characterized in that: The vertical distance between the convex surface of the conical boss and the lower surface of the knife body is 1.25 mm.

10. The grooving cutter according to any one of claims 1 to 9, characterized in that: The knife handle is vertically connected to the upper surface of the knife body, and the knife handle, the knife body, the first blade and the second blade are integrally formed.

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