CN210450340U - Device for cold extruding boss of tooth part - Google Patents
Device for cold extruding boss of tooth part Download PDFInfo
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- CN210450340U CN210450340U CN201822169036.9U CN201822169036U CN210450340U CN 210450340 U CN210450340 U CN 210450340U CN 201822169036 U CN201822169036 U CN 201822169036U CN 210450340 U CN210450340 U CN 210450340U
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- cold extrusion
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- guide wheel
- mandrel
- tooth
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- 238000000641 cold extrusion Methods 0.000 claims abstract description 131
- 230000006835 compression Effects 0.000 claims abstract description 30
- 238000007906 compression Methods 0.000 claims abstract description 30
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
An apparatus for cold extruding a toothed boss, comprising: the device comprises a fixed tooth holder, a cold extrusion mandrel, a compression sleeve, a guide wheel, a cold extrusion wheel and a fastening screw; the cold extrusion mandrel is connected with the cold extruder; the guide wheel is sleeved on the outer circular surface of the cold extrusion mandrel, one end of a fastening screw penetrates through a threaded hole in the side surface of the guide wheel to prop against a shaft groove of the cold extrusion mandrel, the extruded piece is arranged on the cold extrusion mandrel, and the end surface of the fixed tooth holder is tightly attached to the end surface of the near tooth of the guide wheel; the compressing sleeve is arranged on the cold extrusion mandrel, the cold extrusion mandrel is connected with the cold extruder, the cold extrusion wheel is arranged on one side of the cold extrusion mandrel and is simultaneously meshed with the guide wheel and the fixed tooth holder, the inner hole of the cold extrusion wheel is connected with the corresponding shaft of the cold extruder, and the inner hole of the guide wheel is in clearance fit with the optical axis of the cold extrusion mandrel and is supported by the end surface of the shaft shoulder; the outer diameter of the compression sleeve is smaller than the diameter of the inner wall of the rim, the inner hole of the compression sleeve is arranged in the middle of the compression sleeve and sleeved on the cold extrusion mandrel, and the end face of the compression sleeve is in contact with the other end face of the fixed tooth holder. The utility model discloses compact structure, convenient operation, extrusion method is reliable.
Description
Technical Field
The utility model belongs to the machining field relates to a device of cold extrusion tooth portion boss.
Background
As is well known, the relatively common synchronizer in a tractor transmission is a lock-ring inertial synchronizer, and the synchronizer components are core components in the transmission mechanism. The fixed tooth holder of the parts of a certain lock ring type inertia synchronizer is shown in figures 2, 3 and 4, the fixed tooth holder is of a three-petal structure and comprises a gap part, a petal part, gear teeth and a tooth boss, the tooth boss is arranged on two sides of the tooth surface of each gear tooth, the surface of the tooth boss is in an involute shape, and the tooth boss is meshed with related gear parts in the synchronizer and is a main working part of the fixed tooth holder, so that the precision needs to be ensured. In the original manufacturing process of the fixed gear seat, the blank is cylindrical, the gear teeth are continuous and uninterrupted and are formed by hobbing of a hobbing machine, a cold extrusion wheel and the fixed gear seat roll in a mutual meshing mode on the cold extrusion machine, a boss of the gear part is directly extruded and formed in an extrusion mode, and then the notch is cut out through linear cutting, so that the fixed gear seat is in a three-petal shape. This method has the following problems:
1) the production efficiency is low, and the linear cutting time is too long;
2) the material waste is large and 1/3 is occupied by the material cut by the wire.
If the blank of the fixed gear seat is directly forged into a three-segment type, the gear teeth are formed by hobbing of a hobbing machine and are interrupted at the notch, and the notch can be finely machined in a machining center at the later stage to replace linear cutting. However, the existing mode of the cold extrusion machine cannot extrude the tooth part boss of the gear tooth on the discontinuous three-lobe part, and the extrusion device and the extrusion method are not available in the prior art.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects, the utility model aims to provide a device for cold extruding a boss on a tooth part, which extrudes the boss under the condition that the tooth part is interrupted. The cold extrusion device is compact in structure and convenient to operate, reduces the manufacturing cost and improves the production efficiency.
In order to realize the purpose of the invention, the utility model adopts the following technical scheme:
an apparatus for cold extruding a toothed boss, comprising: the cold extrusion device comprises a cold extrusion mandrel, a compression sleeve, a guide wheel, a cold extrusion wheel and a fastening screw; the cold extrusion mandrel is in a stepped shaft form and is divided into a cold extrusion mandrel upper optical axis, a cold extrusion mandrel external spline, a shaft groove, a cold extrusion mandrel middle optical axis, a shaft shoulder and a conical shaft according to sections; the external spline of the cold extrusion mandrel is connected with the internal spline of the extruded part; the cold extrusion mandrel is connected with a corresponding hole of the cold extruder through a conical shaft; the inner hole of the guide wheel is sleeved on the outer circular surface of the cold extrusion mandrel, a threaded hole is formed in the side surface of the guide wheel, one end of the fastening screw penetrates through the threaded hole to abut against the shaft groove of the cold extrusion mandrel, the extruded part is installed on the cold extrusion mandrel, and one end surface of the fixed tooth holder is tightly attached to the near-tooth end surface of the guide wheel and supported by the near-tooth end surface of the guide wheel; the cold extrusion device comprises a cold extrusion mandrel, a compression sleeve, a guide wheel and a fixed tooth holder, wherein the compression sleeve is arranged on the cold extrusion mandrel, an inner hole of the compression sleeve is in clearance fit with an external spline of the cold extrusion mandrel and an optical axis at the upper part of the cold extrusion mandrel, the end surface of the compression sleeve is tightly attached to the other end surface of the fixed tooth holder, the cold extrusion mandrel is connected with a corresponding hole of a cold extrusion machine through a conical shaft, the cold extrusion wheel is arranged on one side of the cold extrusion mandrel and is simultaneously meshed with the guide wheel and the fixed tooth holder, an inner hole of the cold extrusion wheel is in fit connection with a corresponding shaft of the cold extrusion; the outer diameter of the compressing sleeve is smaller than the diameter of the inner wall of the rim, interference with the inner wall of the rim is avoided, an inner hole of the compressing sleeve is arranged in the middle of the compressing sleeve in a smooth hole mode and sleeved on the cold extrusion mandrel, and the end face of the compressing sleeve is in contact with the other end face of the fixed tooth holder.
The middle part of the guide wheel is in a cylindrical gear form and is provided with guide wheel teeth, the outer diameter of the guide wheel teeth is consistent with that of an extruded part, the fixed tooth holder is guided to rotate through the gap part, threaded holes are formed in the radial direction, the upper end and the lower end of the guide wheel are in an optical axis form, the diameter of the upper end and the lower end of the guide wheel is smaller than that of the inner wall of the wheel rim, the two end faces are respectively a far tooth end face and a near tooth end face, the near tooth end face is in contact with the fixed tooth holder, and the; the axial direction is provided with an inner hole of a guide wheel, which is in a smooth hole form and is sleeved on the cold extrusion mandrel.
The cold extrusion wheel is in a cylindrical gear form, annular tooth gaps are formed in the circumferential direction of the cold extrusion wheel teeth, and an inner hole of the cold extrusion wheel is axially formed.
Due to the adoption of the technical scheme, the utility model discloses following beneficial effect can be reached:
1. device of cold extrusion tooth portion boss, compact structure, convenient operation, the running cost is low, extrusion technology method is reliable.
2. Device of cold extrusion tooth portion boss easily adjust the protruding volume of adjustable gear boss when extrudeing.
3. Device and method of cold extrusion tooth portion boss, solved the problem of extrusion incomplete roller gear tooth portion boss, also not limited to complete roller gear's extrusion simultaneously, machining efficiency is high, material cost reduces.
4. The device and the method for cold extruding the boss on the tooth part have simple and easy method, and can be introduced into the gear cold extrusion industry, and are easy to implement.
Drawings
Fig. 1 is a schematic structural view of a tooth boss of a cold extrusion fixing tooth holder of a device for cold extruding the tooth boss of the present invention;
FIG. 2 is a schematic view of a fixed tooth base of a device for cold extruding a boss of a tooth part of the present invention;
FIG. 3 is an enlarged view of a tooth portion of a fixed tooth base of a device for cold extruding a boss of a tooth portion of the present invention;
FIG. 4 is a schematic cross-sectional view of a fixed tooth base of a device for cold extruding a boss on a tooth part of the present invention;
fig. 5 is a schematic structural view of a cold extruding mandrel of a device for cold extruding a boss of a tooth part according to the present invention;
fig. 6 is a schematic structural view of a pressing sleeve of a device for cold-extruding a boss of a tooth part of the present invention;
fig. 7 is a schematic structural view of a guide wheel of a device for cold extruding a tooth boss according to the present invention;
fig. 8 is a schematic structural view of a cold extrusion wheel of a device for cold extruding a boss of a tooth portion of the present invention.
In the figure: 1. fixing the tooth holder; 1a, a notched portion; 1b, a flap portion; 1c, gear teeth; 1d, a tooth boss; 1e, end faces; 1f, fixing an internal spline of the tooth holder; 1g, inner wall of the rim; 2. cold extruding the mandrel; 2a, cold extruding the upper optical axis of the mandrel; 2b, cold extruding the external spline of the mandrel; 2c, a shaft groove; 2d, cold extruding the central optical axis of the mandrel; 2e, a shaft shoulder; 2f, a conical shaft; 3. compressing the sleeve; 3a, pressing the end surface of the sleeve; 3b, compressing the inner hole of the sleeve; 4. A guide wheel; 4a, guiding gear teeth; 4b, a threaded hole; 4c, a far tooth end face; 4d, guiding the inner hole of the wheel; 4e, a near tooth end face; 5. cold extruding wheels; 5a, cold extruding an inner hole of the wheel; 5b, cold extruding gear teeth; 5c, a tooth part gap; 5d, a supporting surface; 6. and (5) fastening the screw.
Detailed Description
The invention will be explained in more detail by the following examples, which are not intended to limit the invention, but are intended to protect all variations and modifications within the scope of the invention.
An apparatus for cold extruding a toothed boss, as shown in fig. 1, comprising: the device comprises a fixed tooth holder 1, a cold extrusion mandrel 2, a compression sleeve 3, a guide wheel 4, a cold extrusion wheel 5 and a fastening screw 6; the cold extrusion mandrel 2 is in a stepped shaft form and is divided into a cold extrusion mandrel upper optical axis 2a, a cold extrusion mandrel external spline 2b, a shaft groove 2c, a cold extrusion mandrel middle optical axis 2d, a shaft shoulder 2e and a conical shaft 2f according to sections; the cold extrusion mandrel external spline 2a is used for being connected with the fixed tooth holder internal spline 1 f; the shaft shoulder 2e plays a supporting role for the guide wheel 4; the cold extrusion mandrel 2 is connected with a corresponding hole of the cold extruder through a conical shaft 2 f; the inner hole of the guide wheel 4 is sleeved on the outer circular surface of the cold extrusion mandrel 2, a threaded hole 4b is formed in the side surface of the guide wheel 4, one end of the fastening screw 6 penetrates through the threaded hole 4b to abut against the shaft groove 2c of the cold extrusion mandrel 2, the fixed toothholder 1 is installed on the cold extrusion mandrel 2, an internal spline 1f of the fixed toothholder is meshed with an external spline 2a of the cold extrusion mandrel, and one end surface of the fixed toothholder 1 is tightly attached to a near-tooth end surface 4e of the guide wheel 4 and supported by the near-tooth end surface 4e of the guide wheel 4; the cold extrusion device comprises a cold extrusion mandrel 2, a compression sleeve 3, a compression sleeve inner hole 3b, a cold extrusion mandrel outer spline 2a, an upper optical axis 2a, a conical shaft 2f, a cold extrusion wheel 5, a guide wheel 4, a fixed tooth holder 1, a cold extrusion wheel inner hole 5a, a guide wheel inner shaft 2d, a shaft shoulder 2e and a fixing gear base, wherein the compression sleeve 3 is sleeved on the cold extrusion mandrel 2;
as shown in fig. 6, the outer diameter of the compression sleeve 3 is smaller than the diameter of the inner wall 1g of the rim, so that the compression sleeve does not interfere with the inner wall 1g of the rim, an inner hole 3b of the compression sleeve is arranged in the middle, the compression sleeve is in a unthreaded hole form and is sleeved on the cold extrusion mandrel 2, and the end surface 3a of the compression sleeve is in contact with the end surface 1e of the fixed toothholder 1 to fix the compression sleeve and prevent the fixed toothholder 1 from moving up and down in the extrusion process;
as shown in fig. 7, the middle part of the guide wheel 4 is in the form of a cylindrical gear, which is a working part, and is provided with a guide gear tooth 4a, the outer diameter of the guide gear tooth 4a is consistent with the outer diameter of the gear tooth 1c of the fixed toothholder 1, so as to be engaged with the cold extrusion wheel 5 simultaneously with the fixed toothholder 1, the guide fixed toothholder 1 is guided to rotate through the notch part 1a, and a threaded hole 4b is formed in the radial direction for installing a fastening screw 6; the upper end and the lower end of the guide wheel 4 are in an optical axis form, the diameter of the guide wheel is smaller than the diameter of the inner wall 1g of the rim, interference with the guide wheel is avoided, and the two end faces are a far tooth end face 4c and a near tooth end face 4e respectively. The near tooth end surface 4e is contacted with the fixed tooth holder 1, and the far tooth end surface 4c is contacted with the shaft shoulder 2e of the cold extrusion mandrel 2; the axial direction is provided with a guide wheel inner hole 4d which is in a smooth hole form and is sleeved on the cold extrusion mandrel 2.
As shown in fig. 8, the cold extrusion wheel 5 is in the form of a cylindrical gear, an annular tooth gap 5c is formed in the circumferential direction of the cold extrusion wheel tooth 5b, the shape and depth of the cold extrusion wheel tooth are determined according to the product requirements of the fixed tooth holder 1, so as to ensure that the height of the extruded tooth boss 1d meets the product requirements, and when the fixed tooth holder 1 is extruded and molded, the tooth boss 1d is formed at the gap; an inner hole 5a of the cold extrusion wheel is axially arranged and used for being arranged on a corresponding shaft of the cold extrusion machine.
The extrusion method for the cold extrusion tooth part boss comprises the following steps:
firstly, an extrusion tooth boss device is installed: fixing a conical shaft 2f at the lower end of the cold extrusion mandrel 2 on a cold extrusion machine, and installing an inner hole 5a of the cold extrusion wheel on the cold extrusion machine; installing a guide wheel 4, wherein the far tooth end surface 4c of the guide wheel 4 is downwards installed on the cold extrusion mandrel 2 and is supported by a shaft shoulder 2 e; the fixed tooth holder 1 which is forged into a three-petal type and has gear teeth 1c which are formed by hobbing is arranged on a cold extrusion mandrel 2, so that an internal spline 1f of the fixed tooth holder is matched with an external spline 2b of the cold extrusion mandrel, an end surface 1e is contacted with an end surface 4e of a guide wheel 4 close to the gear teeth, and the gear teeth 1c are aligned with the guide gear teeth 4a in the vertical direction; sleeving an inner hole 3b of the compression sleeve on the cold extrusion mandrel 2, and compressing an upward end face 1e of the fixed tooth holder 1; the fastening screw 6 is inserted into the screw hole 4b of the guide wheel 4 and tightened to fix the guide wheel 4 to the cold extruding mandrel 2.
Secondly, adjusting a cold extrusion wheel 5: the cold extruding machine is operated to adjust the position of the cold extruding wheel 5 to be close to the cold extruding mandrel 2 and to be simultaneously meshed with the fixed tooth holder 1 and the guide wheel 4;
thirdly, extrusion forming: the cold extrusion machine is operated to enable the cold extrusion wheel 5 and the fixed tooth holder 1 to be meshed with each other and roll, when the cold extrusion wheel 5 rotates to the notch part 1a of the fixed tooth holder 1, the guide wheel 4 drives the cold extrusion wheel 5 to rotate to play a role in guiding, and when the cold extrusion wheel 5 rotates to the petal type part 1b of the fixed tooth holder 1, the cold extrusion wheel 5 and the fixed tooth holder 1 perform an extrusion function, so that the whole extrusion of the three petal type gear teeth 1c of the fixed tooth holder 1 is completed. The tooth gap 5c of the cold extrusion wheel 5 enables the tooth of the fixed tooth holder 1 to form a tooth boss 1 d.
The utility model relates to a device for cold extruding a boss of a tooth part, which adopts a cold extruding wheel with a notch, wherein the cold extruding wheel and an extruded gear structure are meshed and roll, and under certain extrusion force, the tooth surface material of the extruded gear structure flows, thereby solving the problem of rapidly extruding the boss shape of the tooth part;
the utility model discloses a device for cold extrusion of a tooth boss, because the position of a cold extrusion wheel can be adjusted, the height of the extruded tooth boss can be determined by adjusting the distance between the cold extrusion wheel and a cold extrusion mandrel;
the utility model discloses a device for cold extrusion of a boss on a tooth part, because of adopting the guide wheel, when the gear structure has partial gear teeth, the guide wheel drives the cold extrusion wheel to rotate the part, thereby solving the problem of extruding the gear structure with incomplete cylinder and discontinuous tooth part;
a device of cold extrusion tooth portion boss, be applicable to ordinary cold extruder, simple structure, the manufacturing and designing is convenient easy going.
Further explanation is as follows: the embodiments selected for the purpose of disclosing the invention in the detailed description herein are presently considered to be suitable, but it should be understood that the invention is intended to cover all variations and modifications of the embodiments, which fall within the spirit and scope of the present invention.
The part of the utility model not detailed is prior art.
Claims (3)
1. An apparatus for cold extruding a toothed boss, comprising: the device comprises a fixed tooth holder (1), a cold extrusion mandrel (2), a compression sleeve (3), a guide wheel (4), a cold extrusion wheel (5) and a fastening screw (6); the method is characterized in that: the cold extrusion mandrel (2) is in a stepped shaft form and is divided into a cold extrusion mandrel upper optical axis (2 a), a cold extrusion mandrel external spline (2 b), a shaft groove (2 c), a cold extrusion mandrel middle optical axis (2 d), a shaft shoulder (2 e) and a conical shaft (2 f) according to sections; the external spline (2 b) of the cold extrusion mandrel is connected with the internal spline of the extruded piece; the cold extrusion mandrel (2) is connected with a corresponding hole of the cold extrusion machine through a conical shaft (2 f); an inner guide wheel hole (4 d) of the guide wheel (4) is sleeved on the outer circular surface of the cold extrusion mandrel (2), a threaded hole (4 b) is formed in the side surface of the guide wheel (4), one end of the fastening screw (6) penetrates through the threaded hole (4 b) to abut against a shaft groove (2 c) of the cold extrusion mandrel (2), and the fastened part is installed on the cold extrusion mandrel (2), and one end face (1 e) of the fixed tooth holder (1) is tightly attached to a near-tooth end face (4 e) of the guide wheel (4) and supported by the near-tooth end face (4 e) of the guide wheel (4); the cold extrusion die is characterized in that the compression sleeve (3) is arranged on the cold extrusion mandrel (2), an inner hole (3 b) of the compression sleeve is in clearance fit with an external spline (2 b) of the cold extrusion mandrel and an upper optical axis (2 a) of the cold extrusion mandrel, the compression sleeve end face (3 a) of the compression sleeve (3) is tightly attached to the other end face of the fixed tooth holder (1), the cold extrusion mandrel (2) is connected with a corresponding hole of the cold extrusion machine through a conical shaft (2 f), the cold extrusion wheel (5) is arranged on one side of the cold extrusion mandrel (2) and is simultaneously meshed with the guide wheel (4) and the fixed tooth holder (1), an inner hole (5 a) of the cold extrusion wheel is in fit connection with the corresponding shaft of the cold extrusion machine, and an inner hole (4 d) of the guide wheel is in clearance fit with the middle optical axis (2 d) of the cold extrusion mandrel and is supported by; the outer diameter of the compression sleeve (3) is smaller than the diameter (1 g) of the inner wall of the rim, interference with the inner wall of the rim is avoided, an inner hole (3 b) of the compression sleeve is arranged in the middle of the compression sleeve in a unthreaded hole mode and sleeved on the cold extrusion mandrel (2), and the end face (3 a) of the compression sleeve is in contact with the other end face (1 e) of the fixed tooth holder (1).
2. A device for cold extruding a toothed boss according to claim 1, wherein: the middle part of the guide wheel (4) is in a cylindrical gear form and is provided with a guide wheel tooth (4 a), the outer diameter of the guide wheel tooth (4 a) is consistent with that of an extruded part, the guide fixing tooth holder (1) rotates through the notch part (1 a), a threaded hole (4 b) is formed in the radial direction, the upper end and the lower end of the guide wheel (4) are in an optical axis form, the diameter of the upper end and the lower end of the guide wheel (4) is smaller than that of the inner wall (1 g) of a wheel rim, the two end faces are a far tooth end face (4 c) and a near tooth end face (4 e), the near tooth end face (4 e) is in contact with the fixing tooth holder (1), and the far tooth end face (4 c; the axial direction is provided with a guide wheel inner hole (4 d) which is in a smooth hole form and is sleeved on the cold extrusion mandrel (2).
3. A device for cold extruding a toothed boss according to claim 1, wherein: the cold extrusion wheel (5) is in a cylindrical gear form, an annular tooth gap (5 c) is formed in the circumferential direction of the cold extrusion wheel teeth (5 b), and a cold extrusion wheel inner hole (5 a) is axially formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822169036.9U CN210450340U (en) | 2019-02-18 | 2019-02-18 | Device for cold extruding boss of tooth part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822169036.9U CN210450340U (en) | 2019-02-18 | 2019-02-18 | Device for cold extruding boss of tooth part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210450340U true CN210450340U (en) | 2020-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822169036.9U Expired - Fee Related CN210450340U (en) | 2019-02-18 | 2019-02-18 | Device for cold extruding boss of tooth part |
Country Status (1)
| Country | Link |
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| CN (1) | CN210450340U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109513760A (en) * | 2019-02-18 | 2019-03-26 | 第拖拉机股份有限公司 | A kind of device and its pressing method of cold extrusion teeth portion boss |
-
2019
- 2019-02-18 CN CN201822169036.9U patent/CN210450340U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109513760A (en) * | 2019-02-18 | 2019-03-26 | 第拖拉机股份有限公司 | A kind of device and its pressing method of cold extrusion teeth portion boss |
| CN109513760B (en) * | 2019-02-18 | 2024-01-19 | 第一拖拉机股份有限公司 | Device for cold extrusion of tooth boss and extrusion method thereof |
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