Brazed manganese steel cutter

Abstract

The application relates to the technical field of machining tools, in particular to a brazed manganese steel tool, which comprises a tool body, a tool cavity is arranged in the tool body, the tool cavity is connected to the upper and lower ends of the tool body, tool position grooves are arranged on the two sides of the tool cavity and connected to the upper and lower ends of the tool body, tool handles are filled in the tool position grooves, tool heads are brazed to the bottom ends of the tool handles, the two tool handles are symmetrically arranged on the two sides of an adjusting column, the inner surfaces of the two tool handles face the adjusting column, the welding ends of the tool handles and the tool heads are corrected by the positioning relationship of the tool position grooves, the tool handles and the tool heads are ensured to be in the same straight line, and the tool handles are convenient to adjust positions in the tool position grooves with the tool heads in the process of later use. In addition, the tool is free of clamping tools or mechanisms in the brazing process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of machining tools, in particular to a brazed manganese steel tool. BACKGROUND

[0002] Tool brazing refers to a forming method of machining tools, in which a tool head and a tool handle are separately heated to the melting point at high temperature, and then the two are quickly welded together. Machining tools using brazing process have the advantages of small deformation after welding, smooth and beautiful joint, and small polishing workload of welding points.

[0003] In the welding process, in order to ensure that the tool head and the tool handle do not bend after welding, the two are often fixed by a clamp, which needs to be clamped during welding, affecting work efficiency. When the tool head is close to the tool handle, it is limited by the end of the tool handle, making it difficult to polish the rake angle of the tool head. When machining a hole part, the cooling liquid cannot be reasonably applied to the tool body according to the hole depth, resulting in poor cooling effect. SUMMARY

[0004] In order to solve the above problems, the present application provides a brazed manganese steel tool, which comprises a tool body, a tool cavity is formed in the tool body, the tool cavity penetrates the upper and lower ends of the tool body, tool position grooves are formed on both sides of the tool cavity and penetrate the upper and lower ends of the tool body, a tool handle is filled in the tool position grooves, a tool head is brazed to the bottom end of the tool handle, a bearing is fixed at the middle part of the tool cavity, an adjusting column is installed in the tool cavity, the bottom end of the adjusting column is assembled on the bearing, the two tool position grooves are symmetrically arranged on both sides of the adjusting column, the two tool handles are symmetrically arranged on both sides of the adjusting column, the inner surfaces of the two tool handles face the adjusting column, and screw threads are formed on the inner surfaces of the two tool handles and cooperated with the outer surface of the adjusting column, when the adjusting column rotates in the positive and negative directions, the screw threads lift the two tool handles in the two tool position grooves, and the two tool handles lift the two tool heads.

[0005] A step is arranged at the connection between the top end of the two tool heads and the bottom end of the tool handle, a stepped ring is arranged in the tool cavity, the step faces the bottom surface of the stepped ring, a spring is filled in the tool cavity, the bottom end of the spring elastically contacts the step, and the top end of the spring elastically contacts the bottom surface of the stepped ring, when the tool head rises, the step pushes the spring to compress and shorten upward, and when the tool head descends, the pushing force acting on the spring from the bottom end gradually decreases, and the spring elastically lengthens downward.

[0006] First through holes are formed at the bottom end of the tool body on both sides, and the first through holes on both sides are symmetrically arranged on both sides of the spring, when the spring compresses and shortens, the pitch of the spring gradually compresses and becomes smaller relative to the inner side of the first through holes.

[0007] As further preferred, the bottom end of the tool body is provided with a tapered portion gradually tapering downward, the bottom end of the tool position slot is straight up through the tapered surface of the tapered portion to the tool cavity, so that the tapered surface of the tapered portion forms the outer area surface and the inner area surface on both sides of the tool position slot, the outer area surface is higher than the inner area surface, the bottom end of the tool head is provided with a cutting portion expanding outward in the radial direction, the top end of the cutting portion is located at the bottom of the outer area surface, and a height difference gap is formed between the top end of the cutting portion and the bottom of the outer area surface.

[0008] As further preferred, the first through hole on the same side is at least two places above and below, and the first through hole on the bottom side is close to the top of the step.

[0009] As further preferred, the bottom end of the tapered portion is provided with a second through hole, the top end of the second through hole is communicated with the tool cavity, the top end of the second through hole is also communicated with the inside of the spring, and the top end of the second through hole is also communicated with the inside and outside of the first through hole on both sides.

[0010] The connection between the top end of the second through hole and the tool cavity is provided with a tapered transition portion, and the tapered transition portion gradually tapers toward the second through hole.

[0011] As further preferred, the bottom end of the adjusting column is provided with a thin rod, and the thin rod is assembled on the bearing.

[0012] As further preferred, the bearing is fixed above the stepped ring, and the bottom surface of the bearing is limited on the top surface of the stepped ring.

[0013] As further preferred, the inner side surface of the tool handle is provided with an arc surface, the tool cavity is a circular hole, and the arc surface on the inner side surface of the tool handle coincides with the circular inner surface of the tool cavity on the same circumference.

[0014] The outer surface of the spring is smoothly contacted on the arc surface of the tool handle, and the outer surface of the spring is also smoothly contacted on the circular inner surface of the tool cavity.

[0015] As further preferred, an inner hexagonal hole is formed downward from the top end of the adjusting column, and a tapered surface is formed on the outer peripheral surface of the tool body.

[0016] The beneficial effects of the present application compared with the prior art are:

[0017] 1. When the tool is used to weld the manganese steel cutter head to the tool handle, the handle can be inserted into the tool position slot of the tool first, and the handle is pushed to make the welding end of the handle leak out from the bottom end of the tool position slot, and the top end of the cutter head is butted against the bottom end of the handle, then the welding ends of the two are heated to the melting point by high temperature flame, so that the two are brazed together, and finally the top end of the handle is pulled up with force, and the bottom end of the handle is used to pull the cutter head into the tool position slot, at this time, since the welding ends of the cutter head and the handle are both in a high-temperature welding state, when the welding ends are pulled back into the tool position slot, the melting point can be smoothed by the groove surface of the tool position slot, and the welding ends of the handle and the cutter head are corrected by the positioning relationship of the tool position slot, so that the handle and the cutter head are in the same straight line, which is beneficial to the adjustment of the position of the handle with the cutter head in the tool position slot during the later use. In addition, the tool saves the clamping tool or mechanism in the brazing process.

[0018] 2. The heat generated during machining is relatively small, so the spring is compressed and shortened at this time, the flow of the cooling liquid entering the tool cavity through the first through hole is small, and the amount of the cooling liquid entering the tool is sufficient to meet the cooling requirement, and the excess cooling liquid directly acts on other parts of the tool, which is helpful for the rapid cooling of the outside of the tool. Conversely, by adjusting the bottom end of the cutter head downward relative to the bottom end of the tool body, the spring is lengthened, and the gap between each pitch of the spring is increased, that is, more cooling liquid enters the tool cavity through the first through hole. Since the cutter head is adjusted upward, it is suitable for deep hole machining, so the heat generated during machining is relatively high, the spring is lengthened, and the flow of the cooling liquid entering the tool cavity through the first through hole is large, which accelerates the cooling during deep hole machining. Therefore, the cooling liquid can be reasonably applied to the tool body according to the hole depth during hole machining, and the cooling effect is improved.

[0019] 3. The cutting part is adjusted downward relative to the bottom end of the tool body, so that the height difference gap between the cutting part and the bottom of the outer area surface is far away. This height difference gap is the area of the grinding wheel when grinding the cutting part. After this adjustment, the grinding wheel can complete the grinding work in a larger height difference gap, avoiding the influence of the bottom end of the tool body on the rotation of the grinding wheel. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A three-dimensional perspective view of a brazed manganese steel tool is provided for the embodiment of the present application;

[0021] Figure 2 A schematic view of the brazed manganese steel tool provided for the embodiment of the present application is shown in the view from below; Figure 1

[0022] Figure 3 A schematic view of the brazed manganese steel tool provided for the embodiment of the present application is shown in the view from below;

[0023] Figure 4 ​A schematic view of a brazed manganese steel cutter after the cutter body is removed is provided for an embodiment of the present application.

[0024] Figure 5 A brazed manganese steel cutter is provided for an embodiment of the present application, which is shown in another perspective view. Figure 4

[0025] Figure 6 A schematic view of the welding combination of the shank and the head of a brazed manganese steel cutter of an embodiment of the present application when moving downward along the cutter position slot.

[0026] In the figure: 1, cutter body; 2, cutter cavity; 3, cutter position slot; 4, shank; 5, head; 6, bearing; 7, adjusting column; 8, threaded structure; 9, step; 10, stepped ring; 11, spring; 12, first through hole; 13, tapered portion; 14, cutting portion; 15, height difference gap; 16, second through hole; 17, tapered transition portion; 18, thin rod; 19, arc surface; 20, outer area surface; 21, inner area surface; 22, inner hexagonal hole; 23, tapered surface. DETAILED DESCRIPTION

[0027] The above and other embodiments and advantages of the present application are more fully described below in conjunction with the attached drawings. It is obvious that the described embodiments are only some embodiments of the present application, not all embodiments.

[0028] In an embodiment, as shown in Figures 1-6

[0029] The present embodiment provides a brazed manganese steel cutter, which includes a cutter body 1, a cutter cavity 2 is formed in the cutter body 1, the cutter cavity 2 is straight through the upper and lower ends of the cutter body 1, cutter position slots 3 are formed on both sides of the cutter cavity 2 and straight through the upper and lower ends of the cutter body 1, shanks 4 are filled in the cutter position slots 3, heads 5 are brazed to the bottom ends of the shanks 4, bearings 6 are tightly fixed in the middle of the cutter cavity 2, adjusting columns 7 are installed in the cutter cavity 2, the bottom ends of the adjusting columns 7 are assembled on the bearings 6, the two cutter position slots 3 are symmetrically arranged on both sides of the adjusting column 7, the two shanks 4 are symmetrically arranged on both sides of the adjusting column 7, the inner surfaces of the two shanks 4 face the adjusting column 7, threaded structures 8 are formed on the inner surfaces of the two shanks 4 and cooperated with the outer surface of the adjusting column 7, when the adjusting column 7 is rotated in the positive direction or the reverse direction, the two shanks 4 are lifted and lowered in the two cutter position slots 3 by the threaded structure 8, and the two heads 5 are lifted and lowered by the two shanks 4.

[0030] ​​The top end of the two tool bits 5 is connected with the bottom end of the shank 4, and a step 9 is arranged at the connection position. A stepped ring 10 is arranged in the tool cavity 2, and the step 9 faces the bottom surface of the stepped ring 10. A spring 11 is filled in the tool cavity 2, and the bottom end of the spring 11 elastically contacts the step 9, and the top end of the spring 11 elastically contacts the bottom surface of the stepped ring 10. When the tool bit 5 is lifted, the step 9 forces the bottom end of the spring 11, and pushes the spring 11 to compress and shorten. When the tool bit 5 is lowered, the pushing force acting on the spring 11 from the bottom end gradually decreases, and the spring 11 is elastically stretched downward. The first through hole 12 on the same side is at least two, and the first through hole 12 on the bottom side is close to the top of the step 9, that is, the first through hole 12 is arranged in the range where the spring 11 is installed.

[0031] The first through hole 12 is arranged at the bottom end of the tool body 1 on both sides, and the first through holes 12 on both sides are symmetrical on both sides of the spring 11. When the spring 11 is compressed and shortened, the pitch thereof gradually decreases relative to the inner side of the first through hole 12.

[0032] An inner hexagonal hole 22 for rotating the adjusting column 7 by an inner hexagonal wrench is arranged at the top end of the adjusting column 7 downward, and a tapered surface 23 is arranged on the outer peripheral surface of the tool body 1. In use, the tool body 1 is installed on the tailstock of a horizontal machine tool through the tapered surface 23, or is installed on the clamping sleeve of a vertical machine tool. For example, a drill clamp is installed on the tailstock of a common drill press. In order to install the tool on the drill press, the tool sleeve where the tool is arranged is provided with such a tapered surface 23, and the tool sleeve with the tool is forced to hit the drill clamp to complete the fixation.

[0033] In the welding process, when the tool bit 5 made of manganese steel is welded to the shank 4, the shank 4 is first inserted into the tool position groove 3 of the tool, the shank 4 is pushed, the welding end (bottom end) of the shank 4 is leaked from the bottom end of the tool position groove 3, the top end of the tool bit 5 is butted on the bottom end of the shank 4, and then the welding ends of the two are heated to the melting point by a high-temperature flame, so that the two are brazed together. Finally, the top end of the shank 4 is pulled upward, the bottom end of the shank 4 is used to pull the tool bit 5 into the tool position groove 3, at this time, since the welding ends of the tool bit 5 and the shank 4 are in a high-temperature welding state, when the welding ends of the tool bit 5 and the shank 4 are pulled back into the tool position groove 3, the groove surface of the tool position groove 3 can be used to smooth the melting point, and the tool position groove 3 can be used to correct the welding ends of the shank 4 and the tool bit 5, so that the shank 4 and the tool bit 5 are in the same straight line, which is beneficial to the adjustment of the position of the shank 4 with the tool bit 5 in the tool position groove 3 in the later use process. In addition, the tool also saves the clamping tool or mechanism in the brazing process.

[0034] When machining a shallow hole of a workpiece, the tool head 5 does not need to protrude too much from the bottom end of the tool body 1, so the tool shank 4 can be adjusted inward along the tool seat groove 3, and the adjusting column 7 is rotated, and since the height position of the adjusting column 7 does not change, the rotation of the adjusting column 7 will drive the two tool shanks 4 to rise along the two tool seat grooves 3 through the transmission relationship of the screw structure 8, and the two tool shanks 4 drive the two tool heads 5 to rise to a position that can meet the machining of the shallow hole. Conversely, when machining a deep hole of a workpiece, the tool head 5 needs to be adjusted downward, the adjusting column 7 is rotated in the opposite direction, the screw structure 8 is driven by the adjusting column 7, and since the height position of the adjusting column 7 does not change, the reverse rotation of the adjusting column 7 will drive the two tool shanks 4 to descend along the two tool seat grooves 3 through the transmission relationship of the screw structure 8, and the two tool shanks 4 drive the two tool heads 5 to descend to a position that can meet the machining of the deep hole. Thus, the two tool heads 5 are installed in sliding fit on the two tool seat grooves 3, so that the two tool heads 5 can meet the requirements when machining different depths.

[0035] Since the two tool heads 5 can be adjusted in position on the tool seat groove 3, when the tool head 5 needs to be polished after machining, the tool head 5 is also adjusted downward in this way, at this time the tool head 5 is far away from the bottom end of the tool body 1, and the cutting part 14 is the part involved in cutting of the tool head 5, so when the tool head 5 is adjusted downward, it is equivalent to the cutting part 14 also being adjusted downward relative to the bottom end of the tool body 1, so that the height difference gap 15 between the cutting part 14 and the bottom of the outer area surface 20 is pulled away, and this height difference gap 15 is the area for polishing the cutting part 14 by the grinding wheel, after this adjustment, the grinding wheel can complete the polishing work in a larger height difference gap 15, avoiding the influence of the bottom end of the tool body 1 on the rotation of the grinding wheel, and this adjustment of the height difference gap 15 is completed by the downward adjustment of the tool head 5 along the tool seat groove 3, and the downward adjustment of the tool head 5 is completed by the downward adjustment of the tool shank 4, and the downward adjustment of the tool shank 4 is also completed by the transmission action of the screw structure 8 on the inner surface of the tool shank 4 through the rotation of the adjusting column 7. Therefore, the structure of the tool shank 4 adjusting the height of the adjusting column 7 is not only used to adjust the tool head 5 to participate in the machining of different deep holes, but also facilitates the polishing of the tool head 5 after adjustment.

[0036] When the tool head 5 is used to process a hole of a workpiece, heat is generated, and when cooling liquid is supplied to the tool head 5, the cooling liquid enters the tool cavity 2 through the first through holes 12 on both sides, so as to fully cool the inside and outside of the tool. Compared with the existing tool structure, the inside and outside cooling mode is more thorough. When the tool head 5 is adjusted upward relative to the bottom end of the tool body 1 through the above adjustment mode, the tool head 5 will also push the spring 11 upward by using the step 9 at the top end, so that the spring 11 is compressed and shortened. Thus, the gap between each pitch of the spring 11 becomes smaller, that is, the cooling liquid entering the tool cavity 2 through the first through holes 12 will be less. Since the tool head 5 is adjusted upward for shallow hole processing, the heat generated during machining is relatively small, so the spring 11 is compressed and shortened at this time, the flow of the cooling liquid entering the tool cavity 2 through the first through holes 12 is small, and the amount of the cooling liquid entering the inside of the tool meets the cooling requirement, and the excess cooling liquid directly acts on other parts of the tool, which is helpful for rapid cooling of the outside of the tool. Conversely, when the tool head 5 is adjusted downward relative to the bottom end of the tool body 1 through the above adjustment mode, the spring 11 is lengthened, so that the gap between each pitch of the spring 11 becomes larger, that is, the cooling liquid entering the tool cavity 2 through the first through holes 12 will be more. Since the tool head 5 is adjusted upward for deep hole processing, the heat generated during machining is relatively high, so the spring 11 is lengthened at this time, the flow of the cooling liquid entering the tool cavity 2 through the first through holes 12 is large, and the cooling is accelerated during deep hole processing. Therefore, the cooling liquid can be reasonably applied to the tool body according to the hole depth during hole processing, and the cooling effect is improved.

[0037] The connection between the top end of the second through hole 16 and the tool cavity 2 is provided with a tapered transition part 17, which gradually tapers towards the second through hole 16.

[0038] The bottom end of the adjusting column 7 is provided with a thin rod 18, which is assembled on the bearing 6.

[0039] The bearing 6 is fixed above the stepped ring 10, and the bottom surface of the bearing 6 is limited on the top surface of the stepped ring 10.

[0040] The inner side surface of the tool handle 4 is provided with an arc surface 19, and the tool cavity 2 is a circular hole. The arc surface 19 on the inner side surface of the tool handle 4 coincides with the circular inner surface of the tool cavity 2 on the same circumference.

[0041] The bottom end of the tapered part 13 is provided with a second through hole 16, the top end of the second through hole 16 communicates with the tool cavity 2, the top end of the second through hole 16 also communicates with the inside of the spring 11, and the top end of the second through hole 16 also communicates with the inside and outside of the first through holes 12 on both sides. The cooling liquid enters the tool cavity 2 through the first through holes 12 and is discharged outward through the second through hole 16 after cooling.

[0042] The outer surface of the spring 11 is smoothly in contact with the arc surface 19 of the shank 4, and the outer surface of the spring 11 is smoothly in contact with the circular inner surface of the blade cavity 2. The arc surface 19 is positioned and guided to prevent the spring 11 from being bent and deformed when the spring 11 is compressed or elongated.

[0043] The above orientation references do not represent the specific orientation of each component in the present embodiment. The present embodiment is only for the convenience of describing the scheme and is set in a relative description with reference to the orientation in the figure. In essence, the specific orientation of each component is according to its actual installation and actual use as well as the orientation description habitually used by those skilled in the art. This is hereby stated.

[0044] The above specific embodiments further illustrate the purposes, technical solutions, and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not intended to limit the protection scope of the present application. It is particularly pointed out that any modification, equivalent replacement, improvement, etc. made by those skilled in the art within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A brazed manganese steel tool, characterized in that, The utility model provides a cutting tool, including the cutter body (1), the cutter cavity (2) is seted up in the cutter body (1), the cutter cavity (2) is through the upper and lower both ends of cutter body (1), the both sides of cutter cavity (2) are seted up the cutter position slot (3) that is through the upper and lower both ends of cutter body (1), the cutter position slot (3) is filled with the cutter handle (4) in, the bottom end of cutter handle (4) is brazed with the cutter head (5), the middle part of cutter cavity (2) is fixed with bearing (6) closely, the cutter cavity (2) is installed with the adjusting column (7), the bottom end of adjusting column (7) is assembled on bearing (6), two cutter position slots (3) are symmetrical in the both sides of adjusting column (7), make two cutter handles (4) symmetry in the both sides of adjusting column (7), the inner face of two cutter handles (4) faces adjusting column (7), and the inner face of two cutter handles (4) is seted up with the thread structure (8) that is mutually cooperated together with the outer face of adjusting column (7), when adjusting column (7) positive and negative rotation, utilize thread structure (8) with two cutter handles (4) in two cutter position slots (3) lift, and two cutter handles (4) lift with two cutter heads (5), The top end of two cutter heads (5) is equipped with the step (9) at the joint of the bottom end of cutter handle (4), be equipped with the ladder ring (10) in the cutter cavity (2), the step (9) face the bottom surface of ladder ring (10), the cutter cavity (2) is filled with spring (11), the bottom end of spring (11) is elastically contacted on the step (9), the top end of spring (11) is elastically contacted on the bottom surface of ladder ring (10), when the cutter head (5) rises, utilize the step (9) to the bottom end of spring (11) with force, and push spring (11) and compress shortening upwards, when the cutter head (5) drops, the thrust that the bottom end acts on spring (11) gradually reduces, and makes spring (11) and elastically lengthens downwards. The bottom end of cutter body (1) is seted up with the first through -hole (12) on both sides, both sides first through -hole (12) symmetry in the both sides of spring (11), when spring (11) compresses shortening, its pitch gradually compresses small relatively the inside of first through -hole (12).

2. A brazed manganese steel cutter according to claim 1, wherein The bottom end of cutter body (1) is equipped with the taper portion (13) that gradually becomes thin downwards, the bottom end of cutter position slot (3) is by the taper surface of taper portion (13) and is up through cutter cavity (2), make the taper surface of taper portion (13) form the outer area surface (20) and the inner area surface (21) located the both sides of cutter position slot (3), the outer area surface (20) is higher than the inner area surface (21), the bottom end of cutter head (5) is equipped with the cutting portion (14) that expands to the outside diameter direction, the top end of cutting portion (14) is located the bottom of outer area surface (20), and forms height difference gap (15) between the bottom of outer area surface (20).

3. A brazed manganese steel tool according to claim 2, characterised in that The first through -hole (12) of same side is at least upper and lower two places, and the first through -hole (12) of bottom side approaches above the step (9).

4. A brazed manganese steel tool according to claim 3, characterised in that The bottom end of the taper part (13) is provided with a second through hole (16), the top end of the second through hole (16) communicates with the knife cavity (2), the top end of the second through hole (16) also communicates with the inside of the spring (11), and the top end of the second through hole (16) also communicates with the inside and outside of the first through hole (12) on both sides. The connection between the top end of the second through hole (16) and the knife cavity (2) is provided with a taper transition part (17), which gradually tapers towards the second through hole (16).

5. A brazed manganese steel tool blade according to claim 4, characterised in that The bottom end of the adjusting column (7) is provided with a thin rod (18), which is assembled on the bearing (6).

6. A brazed manganese steel tool blade according to claim 5, wherein The bearing (6) is fixed above the stepped ring (10), and the bottom surface of the bearing (6) is limited on the top surface of the stepped ring (10).

7. A brazed manganese steel tool blade according to claim 6, characterised in that The inner side of the knife handle (4) is provided with an arc surface (19), the knife cavity (2) is a circular hole, and the arc surface (19) on the inner side of the knife handle (4) coincides with the circular inner surface of the knife cavity (2) on the same circumference. The outer surface of the spring (11) is smooth and contacts the arc surface (19) of the knife handle (4), and the outer surface of the spring (11) is also smooth and contacts the circular inner surface of the knife cavity (2).

8. A brazed manganese steel tool according to claim 7, characterised in that A hexagonal hole (22) is formed downward from the top end of the adjusting column (7), and a taper surface (23) is formed on the peripheral surface of the cutter body (1).

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