Intermediate-frequency induction quenching tool for inner gear ring workpiece

Abstract

The utility model discloses a medium-frequency induction quenching tool for an inner gear ring workpiece. The medium-frequency induction quenching tool comprises an inner gear ring base, a plurality of rectangular grooves are formed in the top of the inner gear ring base in the circumferential direction. Supporting clamping blocks are arranged in the rectangular grooves correspondingly, and first clamping blocks and second clamping blocks are arranged on the inner sides and the outer sides of the supporting clamping blocks correspondingly. The first clamping block and the second clamping block are used for adjusting the position of the supporting clamping block; step-shaped supporting tables are arranged at the tops of the supporting clamping blocks, and the multiple supporting tables are used for containing inner gear ring workpieces. The multiple rectangular grooves are formed in the inner gear ring base in the circumferential direction, the positions of the supporting clamping blocks are adjusted to support inner gear ring workpieces of different sizes for heat treatment, and the problem that one size of the gear ring corresponds to one tool is solved. The tool machining time and the economic cost are obviously reduced, the process trial-manufacturing cost is reduced to a certain extent, and the tool is easy to install, easy and convenient to disassemble, stable, reliable and long in service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat treatment, in particular to a medium-frequency induction quenching tool for an inner gear ring workpiece. Background Art

[0002] The internal gear ring refers to the internal gear on the same axis as the planet carrier in the planetary gear transmission. The internal gear needs to be induction hardened, which is to use electromagnetic induction to generate eddy currents in the workpiece to heat the workpiece.

[0003] For example, the patent with application number 2011202650307 and name of the anti-deformation tooling for carburizing and quenching of inner gear ring only solves the problem of deformation during the carburizing and quenching process of inner gear ring. However, in actual production, one gear ring often corresponds to one set of induction quenching tooling. Due to the large size of the inner gear ring, one machine tool needs to produce multiple gear rings, and the tooling needs to be replaced frequently; and the base is made of stainless steel, which is large in size and heavy in weight and difficult to disassemble. In addition, during the induction heating process, during the rotation stage of the gear ring, there is a risk of eccentricity of the gear ring; if the contact area between the tooling and the bottom surface of the gear ring is too large, the base tooling is easy to absorb the heat of the gear ring, resulting in insufficient quenching of the contact part; if the gap between the outer circle of the gear ring and the tooling is too small, it is easy to cause large elliptical deformation during the quenching process; in the trial production stage, during the process of optimizing the induction heat treatment parameters, the degree of deformation is also different. In order to accurately measure its heat treatment deformation data, it is often necessary to adjust the gap between the outer circle of the gear ring and the tooling. However, the quenching tooling for inner gear ring in the prior art cannot meet the existing production requirements, and there are problems such as easy eccentricity, deformation and inability to adjust. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model provides a medium-frequency induction quenching tool for an internal gear ring workpiece, which is used to solve the problems in the background technology. The utility model can avoid eccentricity and deformation, reduce tooling processing time and economic cost, and to a certain extent reduce the process trial production cost and is simple to install and disassemble, stable and reliable, and has a long service life.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A medium frequency induction quenching tool for an inner gear ring workpiece, comprising an inner gear ring base;

[0007] A plurality of rectangular grooves are arranged on the top circumference of the inner gear ring base; support blocks are arranged inside the plurality of rectangular grooves, and a first block and a second block are arranged on the inner and outer sides of the support block respectively; the first block and the second block are used to adjust the position of the support block;

[0008] A stepped support platform is arranged on the top of the support block, and a plurality of support platforms are used for placing the inner gear ring workpiece.

[0009] Preferably, a plurality of drainage and weight-reducing holes are provided in the middle of the inner gear ring base, and the plurality of drainage and weight-reducing holes are evenly distributed in the middle of the inner gear ring base.

[0010] Preferably, a positioning hole is provided at the center position of the inner gear ring base, and a thread is provided on the positioning hole for installing a threaded lifting ring.

[0011] Preferably, the gap between the step wall of the top support platform of the support block and the outer surface of the inner gear ring workpiece is not less than 2.5 mm.

[0012] Furthermore, a threaded hole is provided on the step wall of the support platform at the top of the support block, and the clearance of the inner gear ring workpiece is adjusted by passing a bolt through the threaded hole.

[0013] Preferably, the supporting surface roughness of the supporting platform at the top of the supporting block is 6.3.

[0014] Preferably, a fixing hole is provided at the bottom of the inner gear ring base, and the fixing hole is connected to the induction hardening machine tool by bolts.

[0015] Preferably, the inner gear ring base, the supporting block, the first block and the second block are all made of stainless steel.

[0016] Preferably, the support platform of the support block supports an inner gear ring workpiece with a diameter within the range of φ310-430 mm.

[0017] Preferably, the first card block and the second card block are a plurality of plates with different lengths, and the first card block and the second card block can be replaced with each other.

[0018] Compared with the prior art, the utility model has the following beneficial technical effects:

[0019] The utility model provides a medium frequency induction quenching tool for an inner gear ring workpiece. By arranging a plurality of rectangular grooves circumferentially on the inner gear ring base, the inner gear ring workpieces of different sizes can be supported for heat treatment by adjusting the position of the support block, which can meet the induction quenching treatment of the inner gear ring of φ310-430mm, and solve the problem that one size of such gear ring corresponds to one tool. The problem of the card slot can be avoided, and the screwing of the bolt can be compatible with the machining error of the base, and the trial production time can be reduced. The tooling processing time and economic cost are significantly reduced, and the process trial production cost is reduced to a certain extent. The installation is simple, the disassembly is easy, the stability is reliable, and the service life is long.

[0020] Furthermore, all tooling accessories are made of stainless steel, which effectively improves the finish and is easy to clean.

[0021] Furthermore, a plurality of drainage and weight-reducing holes are provided in the middle of the inner gear ring base to reduce the weight of the inner gear ring base and to discharge the quenching liquid in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a medium-frequency induction quenching tooling for an inner gear ring workpiece in the utility model;

[0023] Figure 2 It is a top view schematic diagram of a medium frequency induction quenching tooling for an internal gear ring workpiece in the utility model;

[0024] Figure 3 It is a cross-sectional schematic diagram of a medium frequency induction quenching tooling for an internal gear ring workpiece in the utility model;

[0025] Figure 4 This is a schematic diagram of the support block structure in the utility model;

[0026] In the attached drawings: 1 is the inner gear ring base; 2 is the supporting block; 3 is the first block; 4 is the second block; 5 is the rectangular groove; 6 is the drainage and weight reduction hole; 7 is the positioning hole; 8 is the fixing hole; and 9 is the inner gear ring workpiece. DETAILED DESCRIPTION

[0027] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0033] Example

[0034] like Figures 1 to 4 As shown, a medium frequency induction quenching tool for an inner gear ring workpiece in an embodiment of the utility model includes an inner gear ring base 1, a supporting block 2, a first block 3, and a second block 4.

[0035] A plurality of rectangular grooves 5 are circumferentially arranged on the top of the inner gear ring base 1; in the present embodiment, four rectangular grooves 5 are preferably arranged, and the four rectangular grooves 5 are evenly distributed circumferentially on the upper surface of the inner gear ring base 1; the inner gear ring base 1 is a circular structure.

[0036] The four rectangular grooves 5 are each provided with a support block 2, and the first block 3 and the second block 4 are respectively provided on the inner and outer sides of the support block 2; the first block 3 and the second block 4 are used to adjust the distance between the support block 2 and the circle, so as to support the internal gear ring workpieces of different sizes for heat treatment. A stepped support platform is provided on the top of the support block 2, and the support platform is used to place the internal gear ring workpiece 9.

[0037] The gap between the step wall of the top support platform of the support block 2 and the outer surface of the inner gear ring workpiece 9 is not less than 2.5mm. A threaded hole is provided on the step wall of the top support platform of the support block 2, and the inner gear ring workpiece 9 is fixed by bolts passing through the threaded holes. During the processing, the workpiece rotates and is heated. If the gap is too large, the part may be eccentric during the processing, causing the sensor to contact the workpiece and produce sparks, which may result in the sensor being scrapped at the least, and the machine tool being damaged or a safety hazard. If the gap is too small, the workpiece is easily in contact with the tooling wall during heat deformation, thereby being deformed by compressive stress, which seriously affects the product quality. To address this type of problem, bolts (M6×1.0×15) are provided on the support blocks. During the trial production stage (different gear ring structures, different outer diameters, and different deformation amounts, in order to understand the deformation amount and heat treatment structure), the contact gap between the gear ring and the bolt can be adjusted by advancing and retreating the bolts. On the one hand, the gear ring can be allowed to deform freely due to heat (reducing deformation), and on the other hand, safe production can be ensured. At the same time, the machining errors of the base and the support blocks can also be accommodated. After the trial production is qualified, it is only necessary to fix the thread feed amount (the feed amount for one rotation is 1.0mm) to start mass production.

[0038] The support surface roughness of the support platform at the top of the support block 2 is 6.3, which can prevent the rotating gear ring and the base from slipping.

[0039] The protruding part of the step in the stepped support platform on the support block 2 can prevent the workpiece from falling off during the rotation process. A 2.5mm gap is left between the step wall and the outer surface of the workpiece. In this embodiment, tapping is performed slightly below the center of the step b surface, and an M6*1.0*15 bolt is screwed in. The bolt can be screwed in 1.0mm with one rotation. While being compatible with the processing error of the base, it can effectively solve the problem of adjusting the gap between the outer circle of the gear ring and the tooling in order to accurately measure its heat treatment deformation data during the trial production stage. In order to prevent the occurrence of a stuck slot during the first assembly, 3 direct 10mm holes are drilled on the bottom surface of each slot to avoid this problem.

[0040] The middle of the inner gear ring base 1 is provided with a plurality of drainage and weight-reducing holes 6, which are evenly distributed in the middle of the inner gear ring base 1. A positioning hole 7 is provided at the center of the inner gear ring base 1, and a thread is provided on the positioning hole 7 for installing a threaded lifting ring. In the past, the inner gear ring base tooling relied on manpower to disassemble, but now the center of the circular base is tapped with threads, and the corresponding threaded lifting ring is matched, which can be easily loaded and unloaded; 4 drainage and weight-reducing holes 6 are drilled in the base, which also play the role of timely discharging the quenching liquid, reducing the weight and facilitating disassembly.

[0041] A fixing hole 8 is provided at the bottom of the inner gear ring base 1, and the fixing hole 8 is connected to the induction hardening machine tool through bolts.

[0042] The inner gear ring base 1, the support block 2, the first block 3, and the second block 4 are all made of stainless steel. The first block 3 and the second block 4 are plates of different lengths, and the first block 3 and the second block 4 can be replaced with each other. The finish is effectively improved and easy to clean.

[0043] In this embodiment, the support platform of the support block 2 supports the inner gear ring workpiece 9 with a diameter within the range of φ310-430.

[0044] The utility model designs an inner gear ring base with a variable diameter within a certain range, matches the gear ring support platform, front and rear fixing blocks, and for a new gear ring, only the length of the front and rear fixing blocks needs to be changed, and the two compensate for each other to meet the processing requirements of the new gear ring. Figure 4 As shown, in this embodiment, four rectangular grooves 5 with a length of 80 mm, a width of 50 mm, and a depth of 10 mm are dug at a certain distance from the center of the inner gear ring base 1, and the support block 2, the first block 3, and the second block 4 are arranged according to Figure 3 Assemble as shown. a, b, c satisfy b = 20mm, a + c = 60mm. Through the mutual compensation of a and c, the radial movement of the support block 2 is realized. In actual use, the first block 3 and the second block 4 are replaced, so that the tooling can support the inner gear ring workpiece with a diameter range of φ310-430mm. The bottom surface of the groove supports the workpiece, and the surrounding sides and the first block 3 and the second block 4 clamp the support block 2 so that it does not loosen during the workpiece processing.

[0045] The utility model can determine the lengths a and c according to the outer diameter of the workpiece, and process four sets of first clamping blocks 3 and second clamping blocks 4 tooling components. Figure 3 Assemble. Install the assembled tooling base on the quenching machine. Insert the gear ring and adjust the clearance by screwing it in if necessary. Repeat the above process for gear rings of different specifications.

[0046] In the utility model, the gear ring is placed in an inductor (generally made of a copper tube) through a medium-frequency induction quenching tool for the inner gear ring workpiece. The distance between the inductor and the processed surface of the gear ring is 1-10 mm, and an alternating current of a corresponding frequency (medium frequency 200-10000 Hz) is passed to generate an alternating magnetic field, and an induced alternating current is generated in the metal gear ring. Due to the skin effect, the current is concentrated on the surface of the gear ring, so the surface heats up very quickly, and the quenching temperature can often be reached in a few seconds. Then the corresponding quenching liquid is sprayed to achieve the effect of surface hardening. Induction heating quenching is widely used in gear rings such as gears, shafts, and springs. It confirms the core with tensile stress and the hard surface layer with compressive stress in the gear ring, and has been proven to be very effective in extending service life and wear resistance.

[0047] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0048] In addition, it should be understood that although this specification is described in accordance with the implementation methods, not every implementation method contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should take the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art. The above content is only to illustrate the technical idea of ​​the utility model, and cannot be used to limit the protection scope of the utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the utility model shall fall within the protection scope of the claims of the utility model.

Claims

1. A medium frequency induction quenching tool for an internal gear ring workpiece, characterized in that: It includes an inner gear ring base (1); A plurality of rectangular grooves (5) are arranged in the circumferential direction of the top of the inner gear ring base (1); a support block (2) is arranged inside each of the plurality of rectangular grooves (5); a first block (3) and a second block (4) are arranged on the inner and outer sides of the support block (2); the first block (3) and the second block (4) are used to adjust the position of the support block (2); A stepped support platform is provided on the top of the support block (2), and a plurality of support platforms are used to place the inner gear ring workpiece (9).

2. The medium frequency induction hardening tool for inner gear ring workpiece according to claim 1, characterized in that: A plurality of drainage and weight-reducing holes (6) are arranged in the middle of the inner gear ring base (1), and the plurality of drainage and weight-reducing holes (6) are evenly distributed in the middle of the inner gear ring base (1).

3. The medium frequency induction hardening tool for inner gear ring workpiece according to claim 1, characterized in that: A positioning hole (7) is provided at the center of the inner gear ring base (1), and a thread is provided on the positioning hole (7) for installing a threaded lifting ring.

4. The medium frequency induction quenching tool for an internal gear ring workpiece according to claim 1, characterized in that: The gap between the step wall of the top support platform of the support block (2) and the outer surface of the inner gear ring workpiece (9) is not less than 2.5 mm.

5. The medium frequency induction hardening tool for an internal gear ring workpiece according to claim 4, characterized in that: A threaded hole is provided on the step wall of the support platform at the top of the support block (2), and a bolt is passed through the threaded hole to adjust the clearance of the inner gear ring workpiece (9).

6. The medium frequency induction hardening tool for an internal gear ring workpiece according to claim 1, characterized in that: The supporting surface roughness of the top supporting platform of the supporting block (2) is 6.

3.

7. The medium frequency induction hardening tool for inner gear ring workpiece according to claim 1, characterized in that: A fixing hole (8) is provided at the bottom of the inner gear ring base (1), and the fixing hole (8) is connected to the induction hardening machine tool via bolts.

8. The medium frequency induction hardening tool for an internal gear ring workpiece according to claim 1, characterized in that: The inner gear ring base (1), the supporting clamping block (2), the first clamping block (3) and the second clamping block (4) are all made of stainless steel.

9. The medium frequency induction hardening tool for an internal gear ring workpiece according to claim 1, characterized in that: The support platform of the support block (2) supports an inner gear ring workpiece (9) with a diameter in the range of φ310-430 mm.

10. The medium frequency induction hardening tool for an internal gear ring workpiece according to claim 1, characterized in that: The first card block (3) and the second card block (4) are a plurality of plates of different lengths, and the first card block (3) and the second card block (4) are interchangeable.

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