CN218404326U - Gear ring deformation control mold - Google Patents

Abstract

The utility model discloses a ring gear warp control mould, include: an inner mold; the supporting seats are distributed along the circumferential direction of the inner die; the supporting seat comprises a supporting part, a connecting plate and a transition plate assembly, the transition plate assembly is installed on the inner die, the supporting part is detachably installed on the connecting plate, the supporting part can be arranged on the connecting plate along the axial sliding of the inner die, and the supporting part deviates from one side surface of the connecting plate and is an arc surface. The utility model provides a ring gear warp control mould is through a plurality of the setting of supporting seat utilizes the cambered surface structure of support component, the inner wall of better matching ring gear, and through support component for the small amplitude of connecting plate removes, and the ring gear scope of being suitable for is wider, does not receive the restriction of ring gear diameter and width size, has improved the rigidity and the precision of the size stability of size, the deformation control in-process mould of mould simultaneously.

Description

Gear ring deformation control mold

Technical Field

The utility model relates to a ring gear processing field especially relates to a ring gear warp control mould.

Background

With the rapid development of modern industry, the heat treatment deformation control of workpieces gradually becomes a main index for measuring the heat treatment quality, in particular to the carburizing and quenching deformation control of large gear rings. Carburizing and quenching are the most widely applied heat treatment methods in the gear industry with the best comprehensive properties such as surface hardness, wear resistance, contact, bending fatigue strength and the like. However, when the workpiece is heated, cooled and carburized at a high temperature for a long time, irregular deformation occurs due to the effects of early machining stress, thermal stress of heating and tissue transformation stress, and the product quality is seriously affected.

In the prior art, the control of the carburizing and quenching heat treatment deformation mostly depends on the improvement of a correcting die and a deformation control process method, however, the application range of the existing deformation control process method is small, and the existing deformation control process method is easily limited by the diameter and the height of a gear ring; the existing deformation control mold still has a lot of defects such as precision, operability, applicability, mold strength, fit degree of the mold and a gear ring, and the like.

Therefore, how to effectively improve the stability of the gear ring deformation control mold is a technical problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a ring gear warp control mould for reduce the ring gear and when adding the deformation degree man-hour, guarantee the machining precision of ring gear.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a ring gear deformation control mold comprising:

an inner mold;

the supporting seats are distributed along the circumferential direction of the inner die; the supporting seat comprises a supporting part, a connecting plate and a transition plate assembly, the transition plate assembly is installed on the inner die, the supporting part is detachably installed on the connecting plate, the supporting part can slide along the axial direction of the inner die relative to the connecting plate, and one side surface of the supporting part, which deviates from the connecting plate, is an arc surface.

Preferably, a surface of the support member on a side facing away from the coupling plate is provided with a hardened layer.

Preferably, the number of the supporting seats is 9-16, and the supporting seats are uniformly distributed along the circumferential direction of the inner die.

Preferably, a plurality of supporting arms are arranged on the periphery of the inner die, and the supporting seat is installed on the supporting arms.

Preferably, the inner mold and the support arm are of an integral structure.

Preferably, the supporting part is connected with the connecting plate through a countersunk screw, and the supporting part is provided with a countersunk screw hole for placing the countersunk screw.

Preferably, the transition plate assembly comprises a first transition plate, a second transition plate and a plurality of adjusting blocks positioned between the first transition plate and the second transition plate, and the number or size of the adjusting blocks can be adjusted so that the distance between two adjacent transition plates can be adjusted.

Preferably, the first transition plate and the second transition plate are detachably connected through a screw rod, and the screw rod can penetrate through the first transition plate, the adjusting block and the second transition plate.

Preferably, the mould also comprises a positioning pin, and one end of the positioning pin can be fixedly arranged on the inner mould; and the first transition plate is provided with a positioning hole or a positioning groove which can be matched with the positioning pin.

Preferably, each of the supporting seats comprises a plurality of coupling plates and supporting members, at least one of the supporting members can be mounted on each of the coupling plates, and the coupling plates are arranged along the axial direction of the inner die.

The utility model provides a ring gear warp control mould, include: an inner mold; the supporting seats are distributed along the circumferential direction of the inner die; the supporting seat comprises a supporting part, a connecting plate and a transition plate assembly, the transition plate assembly is installed on the inner die, the supporting part is detachably installed on the connecting plate, the supporting part can be arranged on the connecting plate along the axial sliding of the inner die, and the supporting part deviates from one side surface of the connecting plate and is an arc surface. The utility model provides a ring gear warp control mould is through a plurality of the setting of supporting seat utilizes the ARC structure of support component, the inner wall of better matching ring gear, and through the support component for the small amplitude of connecting plate removes, and the ring gear scope of being suitable for is wider, does not receive the restriction of ring gear diameter and width size, has improved the rigidity and the precision of the size stability of size, the deformation control in-process mould of mould simultaneously.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a specific embodiment of a ring gear deformation control mold provided by the present invention;

FIG. 2 isbase:Sub>A schematic sectional view A-A of the ring gear deformation control mold shown in FIG. 1;

wherein: the device comprises a supporting component-1, a countersunk head screw-2, a connecting plate-3, a transition plate component-4, a first transition plate-5, a second transition plate-6, a screw-7, a connecting screw-8, an adjusting block-9, a positioning pin-10, a bottom screw-11, an internal mold-12 and a bottom plate-13.

Detailed Description

The core of the utility model is to provide a gear ring deformation control mould, which can effectively control and correct the carburizing and quenching deformation of the large gear ring.

In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a specific embodiment of a ring gear deformation control mold according to the present invention; fig. 2 isbase:Sub>A schematic sectional view ofbase:Sub>A-base:Sub>A in the ring gear deformation control mold shown in fig. 1.

In this embodiment, the ring gear deformation control mold includes:

an inner mold 12; a plurality of supporting seats which are distributed along the circumferential direction of the inner die 12; specifically, the inner mold 12 is annular, the inner mold 12 is used as a support main body of the gear ring deformation control mold, and the support seats are preferably uniformly distributed along the circumferential direction of the inner mold 12 to ensure the balance of acting force on the gear ring; the dimensions of the inner die 12 and the supporting seat can determine the final outer diameter dimension of the gear ring deformation control die according to the actual inner hole size of the gear ring part;

the supporting seat comprises a supporting component 1, a connecting plate 3 and a transition plate component 4, the transition plate component 4 is installed on the inner die 12, the supporting component 1 is detachably installed on the connecting plate 3, the supporting component 1 can slide relative to the connecting plate 3 along the axial direction of the inner die 12, so that inner gear rings with different tooth widths can be corrected, and the surface of one side, away from the connecting plate 3, of the supporting component 1 is an arc surface. The supporting part 1 can be a supporting plate or a supporting block, the supporting part 1 is directly contacted with the inner wall of the gear ring, and the surface radian of the supporting part 1 is preferably the same as the inner wall radian of the gear ring, so that the surface of the supporting part 1 is better attached to the inner wall of the gear ring; the connecting plate 3 is preferably of an inverted herringbone structure, at least two grooves are formed in the connecting plate 3, strip-shaped holes are formed in the bottoms of the grooves, the supporting component 1 is connected with the bottoms of the grooves through the countersunk head screws 2, and the countersunk head screws 2 can slide along the strip-shaped holes after being unscrewed, so that the supporting component 1 can slide along the axial direction of the inner die 12, and the gear rings with different widths can be adapted; the structural design of connecting plate 3 can reduce weight on the one hand, and on the other hand can reduce the thickness of seting up of bar hole, and convenient processing, countersunk screw 2 can run through the screw hole and stretch into to the recess of connecting plate 3 in.

The utility model provides a ring gear warp control mould through the setting of a plurality of supporting seats, utilizes the ARC structure of support component 1, and the inner wall of better matching ring gear, and remove for the small amplitude of connecting plate 3 through support component 1, and the ring gear scope of being suitable for is wider, does not receive the restriction of ring gear diameter and width size, has improved the dimensional stability nature of mould, the rigidity and the precision of deformation control in-process mould simultaneously.

In some embodiments, the surface of the support part 1 on the side facing away from the coupling plate 3 is provided with a hardened layer. Specifically, the surface quenching of the support surface of the support member 1 reduces the extrusion deformation of the support surface during the calibration process to increase the hardness of the surface of the support member 1, thereby improving the durability of the support surface.

In some embodiments, the number of the supporting seats is 9 to 16, and the supporting seats are uniformly distributed along the circumferential direction of the inner die 12. Specifically, when the number of the supporting seats is too large, the mold is inconvenient to assemble and disassemble, and when the number of the supporting seats is too small, the deformation control effect is not good, so that the supporting seats are preferably 9-16, the manufacturing is easy, and the good deformation control effect can be achieved.

In some embodiments, the circumference of the inner mold 12 is provided with a plurality of support arms, the support seat is mounted on the support arms, and the support arms can facilitate the mounting of the support seat, improve the connection strength between the support seat and the inner mold 12, and ensure the stability.

In some embodiments, the inner mold 12 and the support arms are of an integral structure, and have high strength and convenient processing, and can be integrally formed by casting.

In some embodiments, the supporting part 1 and the connecting plate 3 are connected through the countersunk head screw 2, the supporting part 1 is provided with a countersunk head screw 2 hole for the countersunk head screw 2 to be put into, and the countersunk head screw 2 is matched with the countersunk head screw 2 hole, so that the influence of the countersunk head screw 2 on the surface of the supporting part 1 can be avoided, and the interference with the inner wall of the gear ring can be avoided.

In some embodiments, the transition plate assembly 4 includes a first transition plate 5, a second transition plate 6, and a plurality of adjusting blocks 9 located between the first transition plate 5 and the second transition plate 6, and the number or size of the adjusting blocks 9 is adjustable so that the distance between two adjacent transition plates is adjustable. Specifically, when the position of the supporting component 1 needs to be adjusted in a small range, the size of the die can be finely adjusted by changing the size of the adjusting block 9 without being influenced by the curvature radius of the supporting component 1 and parts, and when the adjusting block needs to be adjusted in a large range, the size of the die can be matched with the curvature radius of the parts by replacing the supporting component 1 with different sizes, so that the parts with different sizes can be corrected by using the same die, and the die is multifunctional. In order to ensure the dimensional accuracy of the die, the size of the supporting component 1 is processed after the parts are combined, so that the size of the die has better reproducibility; in the process of repeated use, because the position change of each supporting part 1 is small, the size precision of the whole mould is reduced slightly, and the mould can be repeatedly used without reducing the size stability.

In some embodiments, the first transition plate 5 and the second transition plate 6 are detachably connected through a screw 7, the screw 7 can penetrate through the first transition plate 5, the adjusting block 9 and the second transition plate 6, after the first transition plate 5, the adjusting block 9 and the second transition plate 6 are combined, the connecting plate 3 is installed on the second transition plate 6, which can be realized through a connecting screw 8 and a connecting nut, and then the supporting component 1 is installed on the connecting plate 3; in order to improve the connection strength, the connection screw 8 may be connected to the first transition plate 5 after penetrating the second transition plate 6.

In some embodiments, the mold further comprises a positioning pin 10, and one end of the positioning pin 10 may be fixed on the inner mold 12; the first transition plate 5 is provided with a positioning hole or a positioning groove which can be matched with the positioning pin 10, and the positioning accuracy of the first transition plate 5 can be improved by the arrangement of the positioning pin 10, so that the installation is convenient and rapid.

In some embodiments, a bottom plate 13 is further arranged between the first transition plate 5 and the support arm, and the bottom plate 13 is fixedly arranged on the inner die 12 through a bottom screw 11; the bottom plate 13 is arranged, so that the whole supporting seat can be conveniently installed, and the precision is ensured.

In some embodiments, each support seat comprises a plurality of coupling plates 3 and support members 1, at least one support member 1 can be mounted on each coupling plate 3, and the coupling plates 3 are arranged along the axial direction of the inner die 12, so as to meet the processing requirements of gear rings with different thicknesses and improve the dimensional stability.

Specifically, during machining, the gear ring is horizontally placed on a base lifting appliance supported at multiple points, the gear ring is placed into a furnace for heating and quenching, the temperature is Ac3 or 30-50 ℃ above Ac1, and the gear ring is subjected to heat treatment transformation according to the characteristics of the material, namely the metallographic structure is transformed, and the size is further changed.

The process comprises the following steps:

filling, feeding into a furnace, equalizing temperature, quenching and preserving heat, loading on an upper die, quenching medium, tempering for the first time, unloading the die and tempering for the second time.

Specifically, the method comprises the following steps:

step S1: the gear ring is horizontally placed on the base, and is supported at multiple points, preferably 6-16 supporting points, the more the support is, the smaller the stress of each supporting point is, the warping deformation can be effectively reduced, and after the pad is stably installed, the gear ring enters the furnace together for heat treatment;

step S2: in the temperature raising stage, segmented temperature raising and temperature equalization can be carried out, namely the temperature equalization can be carried out for 2-6h at 600-680 ℃ so as to reduce stress and deformation in the heat treatment process;

and step S3: heating to 30-50 ℃ above Ac3 or Ac1 for quenching treatment to enable the gear ring to generate structure transformation, wherein after the temperature is equalized for enough time, the time is generally 2-6h, and the gear ring and the die are taken out of the furnace together to form a quenching medium;

and step S4: lifting the heated gear ring and base hanger out of the heat treatment furnace, rapidly placing the die in an inner hole of the gear ring, then putting the die into a cooling medium (oil or nitrate) for quenching, and simultaneously stirring the medium so as to cool uniformly and reduce deformation; in the quenching and cooling process, along with the reduction of the temperature of the gear ring, the inner circle and the outer circle of the gear ring shrink, and the die is in a cold state, so that the strength is high, and the size is not changed; the thin-wall gear ring is irregularly deformed in the heating and cooling processes and shrinks along with the irregular deformation, the inner circle is sequentially and closely attached to the supporting part 1 of the die at different times, and the irregular deformation of the gear ring is effectively controlled because the die does not generate size change;

step S5: keeping the gear ring after quenching and cooling, a base lifting appliance and a die in a state after quenching and upper die, and lifting the gear ring into a heating furnace for low-temperature tempering at 300-160 ℃ so as to eliminate quenching stress; the internal stress of different sizes generated by different supporting forces of the die due to irregular deformation of the thin-wall large gear ring is eliminated, and the effect of stabilizing the size of the thin-wall large gear ring is achieved;

step S6: after low-temperature stress relief tempering, lifting the gear ring and the die on the base lifting appliance out of the heating furnace, cooling the gear ring and the die to 100-room temperature in the air, and gas cutting the supporting block to enable the die to be in a loose state so as to easily lift the die out of the gear ring and finish the quenching deformation control process;

step S7: and the structure transformation is more thorough by low-temperature stress relief tempering again, the quenching stress (the stress generated in the process of releasing the die and unloading the die) is fully eliminated, the amount of residual austenite is reduced, and the size of the gear ring is stabilized.

This ring gear warp control mould, the strong point design of frock is the multilobe support, according to ring gear diameter size promptly, and the design supports quantity, has increased the area of contact of mould with the ring gear, and the principle of following is: the supporting arc length of each valve is reduced as much as possible, and supporting point positions are increased, so that the influence of unmatched curvature radii is reduced; the size of the die can be adjusted in a small range by adjusting the size of the adjusting block 9, and the size adjustment in a large range is realized by replacing the supporting plates with different curvature radii; the limitation on the height and the stacking number of the parts is relaxed, one or more parts can be processed simultaneously without the limitation of the height of the gear ring, and a large gear ring with the height of more than 100mm can be processed simultaneously by one or more parts, so that the gear ring has multiple functions, and is wider in applicable diameter and height range; the precision of the tool is high, the arc surface design of the supporting plate is closer to the gear ring structure, the supporting plate can be subjected to surface hardening treatment such as surface quenching to improve the strength of the die so as to deal with the release and extrusion deformation of heat treatment stress, the durability of the supporting surface and the service life of the die are improved, the surface hardening treatment of the supporting surface of the supporting plate improves the strength of the die and reduces the deformation; the mould unloading process is quick and convenient, and the mould unloading is carried out by adopting a gas cutting adjusting block 9 mode.

It is right above the utility model provides a ring gear warp control mould introduces in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above description of the embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (10)

1. A gear ring deformation control mold is characterized by comprising:

an inner mold (12);

the supporting seats are distributed along the circumferential direction of the inner die (12); the supporting seat comprises a supporting part (1), a connecting plate (3) and a transition plate assembly (4), the transition plate assembly (4) is installed on the inner die (12), the supporting part (1) is detachably installed on the connecting plate (3), the supporting part (1) can slide along the axial direction of the inner die (12) relative to the connecting plate (3), and one side surface of the supporting part (1) departing from the connecting plate (3) is an arc surface.

2. Mould according to claim 1, characterised in that the surface of the support part (1) on the side facing away from the coupling plate (3) is provided with a hardened layer.

3. The ring gear deformation control die according to claim 1, wherein the number of the support seats is 9-16, and the support seats are uniformly distributed along the circumferential direction of the inner die (12).

4. The ring gear deformation control mold according to claim 1, wherein the inner mold (12) is provided with a plurality of support arms in the circumferential direction, and the support base is mounted on the support arms.

5. The ring gear deformation control die according to claim 4, wherein the inner die (12) is of a unitary structure with the support arm.

6. The gear ring deformation control mold according to claim 1, wherein the support member (1) is connected with the connecting plate (3) through a countersunk screw (2), and the support member (1) is provided with a countersunk screw (2) hole for the countersunk screw (2) to be placed in.

7. The ring gear deformation control mold according to any one of claims 1 to 6, characterized in that the transition plate assembly (4) comprises a first transition plate (5), a second transition plate (6), and a plurality of adjusting blocks (9) located between the first transition plate (5) and the second transition plate (6), wherein the number or size of the adjusting blocks (9) is adjustable so that the distance between two adjacent transition plates is adjustable.

8. The ring gear deformation control mold according to claim 7, wherein the first transition plate (5) and the second transition plate (6) are detachably connected by a screw (7), and the screw (7) can penetrate through the first transition plate (5), the adjusting block (9) and the second transition plate (6).

9. The ring gear deformation control mold according to claim 7, further comprising a positioning pin (10), one end of the positioning pin (10) being fixable to the inner mold (12); and the first transition plate (5) is provided with a positioning hole or a positioning groove which can be matched with the positioning pin (10).

10. A ring gear deformation control mold according to any one of claims 1 to 6, wherein each of the support seats includes a plurality of coupling plates (3) and support members (1), at least one of the support members (1) is mountable to each of the coupling plates (3), and the coupling plates (3) are arranged in the axial direction of the inner mold (12).

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