Replaceable rectangular spline alloy hob

Abstract

The application provides a replaceable rectangular spline alloy hob with an oil channel guide applied to the technical field of cutters, a replaceable cutter block is independently installed by a hob replacement groove on a hob tooth, broken cutter heads are conveniently replaced, the service life of the hob is effectively prolonged, the turning fluid is collected by a liquid inlet groove, the turning fluid flows to the alloy cutter head through a guide groove after entering the hob replacement groove, the turning fluid directly acts on the alloy cutter head, the use efficiency of the turning fluid is improved, the alloy cutter head is provided with stable lubrication and cooling effects, the turning fluid is filtered by a filter screen and a movable filter screen, when a turning operation is performed, the alloy cutter head is pressed and lowered before contacting a workpiece, the movable filter screen is pushed on the filter screen by a connecting guide piece to be staggered to realize mutual covering of filter holes, the filter holes are covered to make the turning fluid flow on the filter screen, the turning fluid washes away the chips, and the chips are effectively prevented from entering the liquid inlet groove.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of cutters, in particular to a replaceable rectangular spline alloy hob. BACKGROUND

[0002] During the operation of a machine, gears are very commonly used parts, and in the process of manufacturing gears, a gear hobbing machine is needed, which processes meshing teeth on a raw part through a rotating hob to process gears, and the alloy hob is a gear processing tool with spiral teeth arranged along a cylinder or a cone, which is used for processing cylindrical gears, worm gears and other cylindrical toothed workpieces. According to different uses, the hob is divided into gear hobs, worm gear hobs, non-involute generating hobs and mounting hobs.

[0003] During the turning work of the hob, turning fluid is needed, which is used to cool and lubricate the hob and the machined part, and at the same time, the turning fluid carries away the turning chips. Since there are very deep chip removal grooves between each hob tooth on the hob, the turning fluid directly poured between the hob and the machined part will flow out of the chip removal groove, and the hob head is not effectively lubricated and cooled, which affects the use of the hob and the machining quality of the machined part.

[0004] In view of the above problems, the present application makes corresponding technical assumptions, that is, the hob head on the hob tooth is changed into a detachable installation mode, and a liquid groove for guiding the flow of turning fluid is arranged on the independent hob head, so that the turning fluid can directly act on the tool, improving the use efficiency of the turning fluid and providing stable lubrication and cooling effect for the tool. SUMMARY

[0005] The application aims to improve the use effect of the turning fluid on the hob and improve the protection effect of the tool. Compared with the prior art, a replaceable rectangular spline alloy hob is provided, a hob replacement groove is arranged at the end of the hob tooth, a replacement tool block is connected to the inside of the hob replacement groove through bolts, a liquid inlet groove is arranged at the middle of the hob tooth and is in communication with the hob replacement groove, an alloy tool head is fixedly connected to the top end of the replacement tool block, and a guide groove is arranged at the back of the replacement tool block.

[0006] The independent installation of the replacement insert is realized by opening the replacement groove on the cutter tooth, the replacement of the damaged cutter head is facilitated, the service life of the hob is effectively improved, the turning fluid is collected in the liquid inlet groove, the turning fluid flows to the alloy cutter head through the guide groove after entering the hob replacement groove, the turning fluid directly acts on the alloy cutter head, the use efficiency of the turning fluid is improved, the alloy cutter head is provided with stable lubrication and cooling effect, the turning fluid is filtered by the filter screen and the movable filter screen, when the turning operation is performed, the alloy cutter head is pressed and lowered before contacting the workpiece, the movable filter screen is pushed on the filter screen by the connecting guide piece, the filter holes of the movable filter screen and the filter screen are covered by each other, the filter holes are covered to realize the flow of the turning fluid on the filter screen, the turning fluid washes away the debris, and the debris is effectively prevented from entering the liquid inlet groove.

[0007] Further, the depth of the hob replacement groove is greater than the depth of the liquid inlet groove, the bottom end of the guide groove is connected with the hob replacement groove, the flow of the turning fluid is realized by the different depths of the hob replacement groove and the liquid inlet groove, and the turning fluid entering the hob replacement groove can enter the guide groove, and the circulation efficiency of the turning fluid is effectively improved.

[0008] Further, the number of guide grooves is two, the two guide grooves are symmetrically distributed on the left and right sides of the replacement insert, the outlet end of the guide groove corresponds to the alloy cutter head, and the two groups of guide grooves realize the dispersion of the turning fluid, so that the turning fluid can fully act on the alloy cutter head, and the lubrication and cooling effect of the alloy cutter head is effectively improved.

[0009] Further, the filter screen is inclined, and a guide bend is fixedly connected between the filter screen and the bottom end of the replacement insert, the inclined filter screen facilitates the flow of the turning fluid, and the guide bend improves the fixing stability of the filter screen.

[0010] Further, the connecting guide piece is made of elastic plastic, and the connecting guide piece is movably connected with the guide bend, the sliding of the connecting guide piece is guided by the guide bend, the lifting movement of the expansion gasket is converted into the thrust of the movable filter screen, and the filter holes of the movable filter screen and the filter screen are staggered.

[0011] Further, the filter holes of the filter screen and the movable filter screen are vertically corresponding, and the filter screen and the movable filter screen are made of wear-resistant plastic, when the filter holes of the filter screen and the movable filter screen correspond, the turning fluid is filtered, when the filter holes of the filter screen and the movable filter screen are staggered, the filter holes are covered by each other, the filter holes are covered to realize the flow of the turning fluid on the filter screen, the turning fluid washes away the debris, and the debris is effectively prevented from entering the liquid inlet groove, the filter screen and the movable filter screen made of wear-resistant plastic have high wear resistance, and the service life of the filter screen and the movable filter screen is effectively improved.

[0012] Optionally, the top end of the expansion gasket is fixedly connected with a top contact, the front end of the top contact protrudes outward, the top contact is used to touch the workpiece in advance, so that the expansion gasket is pressed and lowered.

[0013] Further, the top contact is fixedly connected with the top end of the telescopic pad, and the top end of the elastic protection head protrudes the alloy tool bit. When the telescopic pad is pressed to move downward, the elastic protection head is driven to move downward to expose the alloy tool bit, so that the alloy tool bit performs turning work on the workpiece.

[0014] Further, the elastic protection head is made of rubber material, and the outer surface of the elastic protection head is covered with a cut-resistant textile layer. The elastic protection head made of rubber material has good elastic effect and can buffer and protect the alloy tool bit from being bumped, so as to avoid the alloy tool bit from being damaged. The cut-resistant textile layer on the outer surface of the elastic protection head improves the cutting resistance and effectively prevents the alloy tool bit from cutting the elastic protection head.

[0015] Further, the inside of the top contact is hollow, and the inside of the top contact is fixedly connected with the elastic reset rod, and the other end of the elastic reset rod is fixedly connected with the replacement tool block. When the top contact is in advance touched with the workpiece and drives the telescopic pad to move downward, the elastic reset rod is bent under stress. The hollow top contact provides space for the deformation of the elastic reset rod. Subsequently, the elastic force of the elastic reset rod is used to realize the upward recovery of the telescopic pad.

[0016] Compared with the prior art, the advantages of the present application are:

[0017] (1) The present scheme realizes independent installation of the replacement tool block by opening the hob replacement groove on the hob tooth, facilitates replacement of damaged tool bits, effectively improves the service life of the hob, and uses the liquid inlet groove to collect the sprayed turning fluid. After the turning fluid enters the hob replacement groove, it flows to the alloy tool bit through the guide groove, realizes direct action of the turning fluid on the alloy tool bit, improves the use efficiency of the turning fluid, provides stable lubrication and cooling effect for the alloy tool bit, and filters the turning fluid through the filter screen and the movable filter screen. Before the turning operation, the alloy tool bit contacts the workpiece first, and the telescopic pad is pressed to move downward. The movable filter screen is pushed to be staggered on the filter screen through the connecting guide piece, the filter holes of the movable filter screen and the filter screen are covered by each other, the filter holes are covered to realize the flow of the turning fluid on the filter screen, and the turning fluid is washed away. The debris effectively avoids entering the liquid inlet groove.

[0018] (2) The depth of the hob replacement groove is greater than the depth of the liquid inlet groove, the bottom end of the guide groove is connected with the hob replacement groove, and the depth of the hob replacement groove and the liquid inlet groove is different. The flow of the turning fluid is realized, and the turning fluid entering the hob replacement groove enters the guide groove, effectively improving the flow efficiency of the turning fluid.

[0019] (3) The number of guide grooves is two, and the two guide grooves are symmetrically distributed on the left and right sides of the replacement tool block. The outlet end of the guide groove corresponds to the alloy tool bit, and the two groups of guide grooves realize dispersion of the turning fluid, facilitate full action of the turning fluid on the alloy tool bit, and effectively improve the lubrication and cooling effect of the alloy tool bit.

[0020] (4) The filter screen is set at an angle, and a guide bend is fixedly connected between the filter screen and the bottom of the replacement blade block. The angled filter screen facilitates the flow of cutting fluid, and the guide bend improves the fixed stability of the filter screen.

[0021] (5) The connecting guide is made of elastic plastic and is movably connected to the guide bend. The guide bend guides the sliding of the connecting guide, thereby converting the lifting motion of the telescopic pad into the thrust of the movable filter screen, and thus achieving the misalignment of the filter holes of the movable filter screen and the filter screen.

[0022] (6) The meshes of the filter screen and the movable filter screen are vertically aligned, and both the filter screen and the movable filter screen are made of wear-resistant plastic. When the meshes of the filter screen and the movable filter screen are aligned, the turning fluid is filtered. When the meshes of the filter screen and the movable filter screen are staggered, the filter holes are covered by each other. The covering of the filter holes allows the turning fluid to flow on the filter screen, flushing away the debris and effectively preventing the debris from entering the liquid inlet tank. The filter screen and the movable filter screen made of wear-resistant plastic have high wear resistance and effectively improve the service life of the filter screen and the movable filter screen.

[0023] (7) A top contact is fixedly connected to the top outer surface of the telescopic pad. The front end of the top contact protrudes outward, and the top contact touches the workpiece in advance, thereby realizing the compression reduction of the telescopic pad.

[0024] (8) An elastic protective head is fixedly connected between the top contact and the top of the telescopic pad, and the top of the elastic protective head protrudes from the alloy cutting head. When the telescopic pad is pressed down, it drives the elastic protective head down and exposes the alloy cutting head, so that the alloy cutting head can perform turning operations on the workpiece.

[0025] (9) The elastic protective head is made of rubber material and the outer surface of the elastic protective head is covered with a cut-resistant textile layer. The elastic protective head made of rubber material has good elasticity and can buffer and protect the alloy blade from impacts, preventing the alloy blade from breaking. The cut-resistant textile layer on the outside of the elastic protective head improves the cut resistance and effectively prevents the alloy blade from cutting the elastic protective head.

[0026] (10) The top contact is hollow inside, and an elastic reset rod is fixedly connected inside the top contact. The other end of the elastic reset rod is fixedly connected to the replacement tool block. When the top contact touches the workpiece in advance and drives the telescopic pad to move downward, the elastic reset rod is bent by force. The hollow top contact provides space for the deformation of the elastic reset rod. The elastic force of the elastic reset rod is then used to realize the upward restoration of the telescopic pad. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the present application;

[0028] Figure 2 For this application Figure 1the local enlarged view in the figure;

[0029] Figure 3 a perspective view of the replaceable insert of the present application;

[0030] Figure 4 a demonstration of the flow of the turning fluid of the present application;

[0031] Figure 5 a side view of the present application;

[0032] Figure 6 a perspective view of the replaceable insert of the present application; Figure 5 the local enlarged view in the figure;

[0033] Figure 7 a demonstration of the turning working state of the present application;

[0034] Figure 8 a perspective view of the replaceable insert and the expansion gasket of the present application;

[0035] Figure 9 a side view of the replaceable insert and the expansion gasket of the present application;

[0036] Figure 10 a demonstration of the deformation bending change of the elastic reset rod of the present application.

[0037] Explanation of the figure:

[0038] 1 cutter shaft, 2 cutter tooth, 201 cutter replacement slot, 202 replaceable insert, 203 liquid inlet slot, 204 alloy tool bit, 205 guide groove, 3 chip removal slot, 4 filter screen, 5 expansion gasket, 501 connecting guide piece, 502 movable filter screen, 6 guide bending piece, 7 top contact, 701 elastic protection head, 702 elastic reset rod. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0040] Embodiment 1:

[0041] The present application provides a replaceable rectangular spline alloy hob, please refer to Figures 1-4, including the hob shaft 1, and the hob shaft 1 surface spiral arrangement fixedly connected with the hob teeth 2, the adjacent hob teeth 2 between the opening of the chip flute 3, the hob teeth 2 of the end opening of the hob replacement slot 201, and the inside bolt connection of the hob replacement slot 201 has a replacement blade 202, the middle part of the hob teeth 2 opening has a liquid inlet groove 203, and the liquid inlet groove 203 is communicated with the hob replacement slot 201, the depth of the hob replacement slot 201 is greater than the depth of the liquid inlet groove 203, the top of the replacement blade 202 is fixedly connected with the alloy tool bit 204, the back of the replacement blade 202 is provided with a guide groove 205, the bottom of the guide groove 205 is communicated with the hob replacement slot 201, the guide groove 205 is two, two guide grooves 205 are symmetrically distributed on the left and right sides of the replacement blade 202, and the outlet end of the guide groove 205 corresponds to the alloy tool bit 204;

[0042] In use, the replacement blade 202 that meets the requirements of the workpiece is selected, the replacement blade 202 is assembled into the hob replacement slot 201 in the form of bolt installation, the independent installation of the replacement blade 202 is realized, the replacement blade 202 can be replaced in time when the alloy tool bit 204 on the replacement blade 202 is damaged, the service life of the hob is effectively improved, the liquid inlet groove 203 collects the turning fluid poured during turning, the design that the depth of the hob replacement slot 201 is greater than the depth of the liquid inlet groove 203 is used, the turning fluid enters the hob replacement slot 201, then flows to the alloy tool bit 204 through the guide groove 205, and two groups of guide grooves 205 realize dispersion of the turning fluid, so that the turning fluid can fully act on the alloy tool bit 204, the turning fluid directly acts on the alloy tool bit 204, the use efficiency of the turning fluid is improved, and stable lubrication and cooling effects are provided for the alloy tool bit 204.

[0043] Embodiment 2:

[0044] Compared with embodiment 1, the embodiment mainly adds the movable filter screen 502 on the filter screen 4, the filter holes of the movable filter screen 502 and the filter screen 4 are mutually covered, and the debris is prevented from entering the liquid inlet groove 203, please refer to Figures 5-7 , the inside of the liquid inlet groove 203 is fixedly connected with the filter screen 4, the filter screen 4 is inclinedly arranged, and the filter screen 4 and the bottom end of the replacement blade 202 are fixedly connected with the guide bent piece 6, the outer surface of the replacement blade 202 is movably connected with the expansion joint 5, the bottom end of the expansion joint 5 is fixedly connected with the connecting guide piece 501, the connecting guide piece 501 is made of elastic plastic, the connecting guide piece 501 is movably connected with the guide bent piece 6, the bottom end of the connecting guide piece 501 is fixedly connected with the movable filter screen 502, and the movable filter screen 502 is movably connected with the filter screen 4, the filter screen 4 and the movable filter screen 502 are vertically corresponding, and the filter screen 4 and the movable filter screen 502 are both made of wear-resistant plastic;

[0045] When the turning operation is performed, the helically arranged hob teeth 2 on the hob successively turn the workpiece, and before the alloy cutter head 204 contacts the workpiece, the telescopic pad 5 is pressed and lowered due to the fact that the top contact head 7 contacts the workpiece first, the pressure of the telescopic pad 5 being lowered is applied to the movable filter screen 502 through the connecting guide piece 501, so that the movable filter screen 502 is staggered on the filter screen 4, the filter holes on the movable filter screen 502 and the filter screen 4 are covered by each other, and the filter holes are in a covered state, and the turning fluid that can originally pass through can only flow on the filter screen, the debris turned down by the subsequent hob tooth 2 falls on the closed filter screen and is washed away by the subsequent flowing turning fluid, so that the debris is effectively prevented from entering the liquid inlet groove 203.

[0046] Embodiment 3

[0047] Compared with embodiment 1, the embodiment mainly adds the top contact head 7 and the elastic protection head 701, and the elastic protection head 701 is used to protect the alloy cutter head 204, please refer to Figures 8-10 The top end outer surface of the telescopic pad 5 is fixedly connected with the top contact head 7, the front end of the top contact head 7 protrudes outward, the top contact head 7 is used to touch the workpiece in advance, so that the telescopic pad 5 is pressed and lowered, the top contact head 7 and the top end of the telescopic pad 5 are fixedly connected with the elastic protection head 701, and the top end of the elastic protection head 701 protrudes the alloy cutter head 204, the elastic protection head 701 is made of rubber material and the outer surface of the elastic protection head 701 is covered with a cut-resistant textile layer, the elastic protection head 701 made of rubber material has good elastic effect and can buffer and protect the alloy cutter head 204 from being bumped, the inside of the top contact head 7 is hollow, and the inside of the top contact head 7 is fixedly connected with the elastic reset rod 702, and the other end of the elastic reset rod 702 is fixedly connected with the replacement cutter block 202.

[0048] When the hob is not in the turning operation state, the elastic protection head 701 on the telescopic pad 5 has a shielding effect on the alloy cutter head 204, when a hard object in the outside world bumps into the hob, the elastic protection head 701 made of rubber material buffers and protects the alloy cutter head 204 from being bumped, so that the alloy cutter head 204 is prevented from being damaged, the cut-resistant textile layer on the elastic protection head 701 effectively prevents the alloy cutter head 204 from cutting the elastic protection head 701, when the turning operation is performed, the helically arranged hob teeth 2 on the hob successively turn the workpiece, in the process of rotating the hob, the top contact head 7 is used to touch the workpiece in advance, the top contact head 7 is stressed to apply downward pressure to the telescopic pad 5, the telescopic pad 5 is lowered, the alloy cutter head 204 originally covered by the elastic protection head 701 is exposed, so that the alloy cutter head 204 turns the workpiece, in the process of the telescopic pad 5 being lowered, the elastic reset rod 702 is bent due to pressure, the elastic reset rod 702 provides upward thrust to the telescopic pad 5 by using the elastic force of the elastic reset rod 702, and the telescopic pad 5 is restored at the end of the turning.

[0049] The above description is only preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacements or changes according to the technical solution and the improvement concept of the present application within the technical scope disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A replaceable rectangular spline alloy hob, comprising a hob shaft (1), wherein hob teeth (2) are helically arranged and fixedly connected to the surface of the hob shaft (1), and chip removal grooves (3) are provided between adjacent hob teeth (2), characterized in that, The end of the hobbing tooth (2) is provided with a hobbing replacement groove (201), and a replacement blade block (202) is bolted inside the hobbing replacement groove (201). The middle part of the hobbing tooth (2) is provided with a liquid inlet groove (203), and the liquid inlet groove (203) is connected to the hobbing replacement groove (201). The top of the replacement blade block (202) is fixedly connected with an alloy blade head (204). The back of the replacement blade block (202) is provided with a guide groove (205). The depth of the hobbing replacement groove (201) is greater than the depth of the liquid inlet groove (203). The bottom end of the guide groove (205) is connected to the hobbing replacement groove (201). The liquid inlet tank (203) is fixedly connected to a filter screen (4), and the outer surface of the replacement blade block (202) is movably connected to a telescopic pad (5). The bottom end of the telescopic pad (5) is fixedly connected to a connecting guide plate (501), and the bottom end of the connecting guide plate (501) is fixedly connected to a movable filter screen (502). The movable filter screen (502) is movably connected to the filter screen (4). The top outer surface of the telescopic pad (5) is fixedly connected to a top contact (7). The front end of the top contact (7) protrudes outward. An elastic protective head (701) is fixedly connected between the top contact (7) and the top of the telescopic pad (5). The top of the elastic protective head (701) protrudes an alloy blade (204). The elastic protective head (701) is made of rubber material. The outer surface of the elastic protective head (701) is covered with a cut-resistant textile layer. The interior of the top contact (7) is hollow. An elastic reset rod (702) is fixedly connected inside the top contact (7). The other end of the elastic reset rod (702) is fixedly connected to the replacement blade block (202).

2. The replaceable rectangular spline alloy hob according to claim 1, characterized in that, There are two guide grooves (205), which are symmetrically distributed on the left and right sides of the replacement blade block (202). The outlet end of the guide groove (205) corresponds to the alloy blade head (204).

3. The replaceable rectangular spline alloy hob according to claim 1, characterized in that, The filter screen (4) is inclined, and a guide bend (6) is fixedly connected between the filter screen (4) and the bottom end of the replacement blade block (202).

4. The replaceable rectangular spline alloy hob according to claim 3, characterized in that, The connecting guide plate (501) is made of elastic plastic and is movably connected to the guide bend plate (6).

5. The replaceable rectangular spline alloy hob according to claim 1, characterized in that, The mesh openings of the filter screen (4) and the movable filter screen (502) are vertically aligned, and both the filter screen (4) and the movable filter screen (502) are made of wear-resistant plastic.

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