Broaching tool with key groove positioning function
By setting a combined structure of positioning grooves, inner grooves, positioning ribs and sliders on the keyway broach and pull sleeve, the vibration problems caused by the lack of vertical limit mechanism during the processing process of the existing keyway broach are solved, and higher machining accuracy and longer tool service life are achieved.
Patent Information
- Application Number
- CN202411864490.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-03-21
AI Technical Summary
During the processing process, existing keyway broaches lack effective vertical limit mechanisms, which are susceptible to unstable factors, causing tool vibration, affecting processing accuracy and increasing production costs.
A broaching tool with the function of positioning keyway is designed. By setting a combined structure of positioning grooves, inner grooves, positioning ribs and sliders on the keyway broach and pull sleeve, it ensures that the tool maintains a stable position and posture during the processing process.
It effectively avoids the tool from being offset or shaking due to cutting force or vibration, improves machining accuracy, reduces tool wear and damage, extends the tool service life, and reduces production costs.
Smart Images
Figure CN119658014A_ABST
Abstract
Description
[0001] The invention belongs to the technical field of mechanical engineering, in particular to a broaching tool with a positioning keyway function. Background Art
[0002] Keyway broaches are tools used to broach keyways, and are suitable for keyway processing of semicircular keyways and flat keys. They have the characteristics of large broaching allowance and large number of teeth, and are suitable for processing keyways of various sizes. In the process of processing keyways in cylinders, the existing keyway broach design has some obvious problems, especially insufficient limit in the vertical direction. Specifically, since the tool body of the keyway broach has no effective limit mechanism in the vertical direction, the broach is easily affected by various unstable factors during the cutting process.
[0003] The design feature of the keyway broach is that there is a cutting edge on its upper part, and this part of the edge will bear a huge reaction force from the workpiece during the broaching process. This reaction force will produce a component force in the vertical direction, causing the broach to vibrate up and down during the cutting process. This vibration will not only affect the processing accuracy, but may also lead to a series of serious consequences.
[0004] First, the up and down vibration will cause the contact between the broach and the workpiece surface to be unstable during the cutting process, which is prone to biting, that is, the broach will scratch or tear the workpiece surface during the cutting process, seriously affecting the processing quality; secondly, due to the additional load caused by the vibration, the cutter teeth may break due to unbearable load, which will not only damage the tool, but also increase production costs and processing time; in addition, vibration will also lead to poor surface quality, ripples, scratches and other defects, which cannot meet the requirements of high-precision processing. Summary of the invention
[0005] In order to solve the problems raised in the above background technology, the present invention provides a broaching tool with a positioning keyway function.
[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a broaching tool with a keyway positioning function, comprising a keyway broach and a broaching sleeve, a positioning groove one is provided on one side surface of the keyway broach, an inner groove one is provided on the inner wall of the positioning groove one, a positioning rib two is fixedly installed on the other side surface of the keyway broach, a slider two is fixedly installed on the surface of the positioning rib two, a positioning groove two is provided on the inner wall of one side of the broaching sleeve, an inner groove two is provided on the inner wall of the positioning groove two, a positioning rib one is fixedly installed on the inner wall of the other side of the broaching sleeve, and a slider one is fixedly installed on the surface of the positioning rib one, a tool handle is fixedly installed on one end of the keyway broach, and cutting teeth are fixedly installed on the surface of the keyway broach.
[0007] Preferably, the inner diameter of the positioning groove 1 is equal to the outer diameter of the positioning rib 1, and the inner diameter of the inner groove 1 is equal to the outer diameter of the slider 1.
[0008] Preferably, the inner diameter of the second positioning groove is equal to the outer diameter of the second positioning rib, and the inner diameter of the second inner groove is equal to the outer diameter of the second slider.
[0009] Preferably, a sponge layer is provided on the surface of the handle, and the cutting teeth are made entirely of stainless steel.
[0010] Preferably, the number of the inner grooves one and the number of the inner grooves two are both three groups, the three groups of the inner grooves one are evenly distributed inside the positioning groove one, and the three groups of the inner grooves two are evenly distributed inside the positioning groove two.
[0011] Preferably, the heights of the cutting teeth are in increasing order from left to right, and the height of the leftmost cutting tooth is lower than that of the rightmost cutting tooth.
[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention pushes the keyway broach to slide and causes the positioning rib 1 to slide inside the positioning groove 1, the inner groove 1 to slide inside the slide block 1, and the positioning rib 2 to slide inside the positioning groove 2, while the slide block 2 slides inside the inner groove 2. Compared with the traditional device, this device can ensure that the broaching tool maintains a stable position and posture during the processing, thereby avoiding the tool from shifting or shaking due to cutting force or vibration, thereby ensuring that the size and shape accuracy of the processed parts meet the design requirements. At the same time, this device can reduce the wear and damage of the tool during the processing, thereby preventing the tool from chipping or breaking due to excessive vibration, thereby extending the service life of the tool.
[0013] 2. The present invention can more accurately control the position and posture of the turning tool during the processing through the cooperation between the second positioning rib and the second positioning groove, the cooperation between the second slider and the second inner groove, the cooperation between the first positioning rib and the first positioning groove, and the cooperation between the first inner groove and the first slider, thereby helping to reduce the deviation or shaking of the tool caused by cutting force or vibration, thereby further improving the processing accuracy, and at the same time can enhance the stability of the tool during the processing, reduce the wear and damage caused by vibration or impact, thereby extending the service life of the tool, and then improving production efficiency and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the pull sleeve structure of the present invention; Figure 3 It is a schematic diagram of the explosion structure of the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the partially enlarged structure at center A; Figure 5 For the present invention Figure 3 Schematic diagram of the local enlarged structure at point B in the middle.
[0015] In the figure: 1. keyway broach; 2. tool handle; 3. cutting tooth; 4. positioning groove one; 5. inner groove one; 6. pulling sleeve; 7. positioning rib one; 8. slider one; 9. positioning groove two; 10. inner groove two; 11. positioning rib two; 12. slider two. DETAILED DESCRIPTION
[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0017] like Figures 1 to 5 As shown, the present invention provides a broaching tool with a keyway positioning function, comprising a keyway broach 1 and a broaching sleeve 6, a positioning groove 4 is provided on one side surface of the keyway broach 1, an inner groove 5 is provided on the inner wall of the positioning groove 4, a positioning rib 11 is fixedly installed on the other side surface of the keyway broach 1, a slider 12 is fixedly installed on the surface of the positioning rib 11, a positioning groove 9 is provided on the inner wall of one side of the broaching sleeve 6, an inner groove 10 is provided on the inner wall of the positioning groove 9, a positioning rib 7 is fixedly installed on the inner wall of the other side of the broaching sleeve 6, and a slider 8 is fixedly installed on the surface of the positioning rib 7, a tool handle 2 is fixedly installed on one end of the keyway broach 1, and a cutting tooth 3 is fixedly installed on the surface of the keyway broach 1; The above scheme is adopted: this device can ensure that the broaching tool maintains a stable position and posture during the processing process, thereby preventing the tool from shifting or shaking due to cutting force or vibration, thereby ensuring that the size and shape accuracy of the processed parts meet the design requirements. At the same time, this device can reduce the wear and damage of the tool during the processing process, thereby preventing the tool from chipping or breaking due to excessive vibration, and extending the service life of the tool.
[0018] like Figure 3 As shown, the inner diameter of the positioning groove 4 is equal to the outer diameter of the positioning rib 7, and the inner diameter of the inner groove 5 is equal to the outer diameter of the slider 8; The above scheme is adopted: by setting the inner diameter value of the positioning groove 4 and the outer diameter value of the positioning rib 7 to be equal in size, and setting the inner diameter value of the inner groove 5 and the outer diameter value of the slider 8 to be equal in size, the positioning rib 7 is more stable when sliding inside the positioning groove 4, and the slider 8 is more stable when sliding inside the inner groove 5.
[0019] like Figure 3As shown, the inner diameter of the second positioning groove 9 is equal to the outer diameter of the second positioning rib 11, and the inner diameter of the second inner groove 10 is equal to the outer diameter of the second slider 12; The above scheme is adopted: by setting the inner diameter value of the positioning groove 2 9 and the outer diameter value of the positioning rib 2 11 to be equal in size, and setting the inner diameter value of the inner groove 2 10 and the outer diameter value of the slider 2 12 to be equal in size, so that the positioning rib 2 11 can slide more closely inside the positioning groove 2 9, and the slider 2 can slide more closely inside the inner groove 2 10.
[0020] like Figure 1 As shown, the surface of the handle 2 is provided with a sponge layer, and the cutting teeth 3 are made entirely of stainless steel; The above solution is adopted: a sponge layer is provided on the surface of the handle 2 to improve the comfort of the staff, and the cutting teeth 3 are made entirely of stainless steel, which has high strength and good rust resistance.
[0021] like Figure 3 As shown, the number of inner grooves 1 5 and inner grooves 2 10 are both three groups, the three groups of inner grooves 1 5 are evenly distributed inside the positioning groove 1 4, and the three groups of inner grooves 2 10 are evenly distributed inside the positioning groove 2 9; The above solution is adopted: by providing three groups of inner grooves 1 5 and inner grooves 2 10, and the three groups of inner grooves 1 5 and inner grooves 2 10 are respectively distributed inside the positioning grooves 1 4 and the positioning grooves 2 9, so as to further improve the stability and thus improve the quality.
[0022] like Figure 1 As shown, the heights of the cutting teeth 3 are in increasing order from left to right, and the height of the cutting tooth 3 at the far left is lower than that of the cutting tooth 3 at the far right; By adopting the above scheme, the height of the cutting teeth 3 is increased from left to right, and the height of the leftmost cutting tooth 3 is lower than the rightmost cutting tooth 3, so that the metal can be cut layer by layer, realizing a continuous and smooth cutting process.
[0023] The working principle and use process of the present invention: When in use, the staff holds the tool handle 2 and pushes the keyway broach 1, so that the keyway broach 1 moves forward inside the pull sleeve 6 and processes the object to be processed through the cutting teeth 3. At the same time, the positioning rib 7 slides synchronously inside the positioning groove 4, and the slider 8 slides inside the inner groove 5 at the same time. The positioning rib 11 slides inside the positioning groove 9 at the same time, and the slider 12 slides inside the inner groove 10, thereby ensuring the stability of the cutting teeth 3 when processing the object.
[0024] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A broaching tool with a keyway positioning function, comprising a keyway broach (1) and a broaching sleeve (6), characterized in that: A positioning groove (4) is provided on one side surface of the keyway broach (1), an inner groove (5) is provided on the inner wall of the positioning groove (4), a positioning rib (11) is fixedly mounted on the other side surface of the keyway broach (1), a slider (12) is fixedly mounted on the surface of the positioning rib (11), a positioning groove (9) is provided on the inner wall of one side of the pull sleeve (6), an inner groove (10) is provided on the inner wall of the positioning groove (9), a positioning rib (7) is fixedly mounted on the inner wall of the other side of the pull sleeve (6), and a slider (8) is fixedly mounted on the surface of the positioning rib (7), a tool handle (2) is fixedly mounted on one end of the keyway broach (1), and a cutting tooth (3) is fixedly mounted on the surface of the keyway broach (1).
2. The broaching tool with positioning keyway function according to claim 1, characterized in that: The inner diameter of the positioning groove 1 (4) is equal to the outer diameter of the positioning rib 1 (7), and the inner diameter of the inner groove 1 (5) is equal to the outer diameter of the slider 1 (8).
3. The broaching tool with positioning keyway function according to claim 1, characterized in that: The inner diameter of the second positioning groove (9) is equal to the outer diameter of the second positioning rib (11), and the inner diameter of the second inner groove (10) is equal to the outer diameter of the second slider (12).
4. The broaching tool with positioning keyway function according to claim 1, characterized in that: The surface of the knife handle (2) is provided with a sponge layer, and the cutting teeth (3) are made entirely of stainless steel.
5. The broaching tool with positioning keyway function according to claim 1, characterized in that: The number of the inner grooves one (5) and the inner grooves two (10) is three groups, the three groups of the inner grooves one (5) are evenly distributed inside the positioning groove one (4), and the three groups of the inner grooves two (10) are evenly distributed inside the positioning groove two (9).
6. The broaching tool with positioning keyway function according to claim 1, characterized in that: The heights of the cutting teeth (3) are in an increasing state from left to right, and the height of the cutting teeth (3) at the far left is lower than that of the cutting teeth (3) at the far right.