Pressure quenching device for efficiently controlling flatness of synchronizer

Abstract

The invention provides a pressing and quenching device for efficiently controlling the flatness of a synchronizer. The pressing and quenching device comprises a pressing and quenching upper die body, a pressing die limiting disc, a pressing die sliding base and an elastic assembly. A limiting structure is arranged at one end of the pressing die limiting disc, so that a T-shaped through hole is formed in the middle of the pressing die limiting disc, and a large round end and a small round end are formed at the two ends of the pressing die limiting disc respectively; a limiting circular truncated cone is arranged on the circumferential surface of the top of the pressing die sliding base, the pressing die sliding base is connected into the pressing die limiting disc in a sleeved mode, and the limiting circular truncated cone is in limiting fit with the limiting structure of the pressing die limiting disc. The pressing and quenching upper die body is fixedly mounted on the upper end face of the pressing die limiting disc and is further provided with an elastic assembly; the elastic assembly is in contact with the upper end face of the pressing die sliding base. And acting force is applied to the bottom end of the pressing die sliding seat, so that the pressing die sliding seat can move or reset relative to the pressure quenching upper die body. The parallelism of upper and lower dies of a workpiece is efficiently guaranteed, and the defect of insufficient precision of a machine tool is overcome.

Description

Technical Field

[0001] The invention belongs to the field of heat treatment processing, and in particular relates to a press quenching device for efficiently controlling the flatness of a synchronizer. Background Art

[0002] Among the gearbox parts, synchronizer gear sleeves require press quenching for most parts to ensure the accuracy of the finished product splines. That is, the splines of the heated workpiece are inserted into a core die, and the workpiece is quenched under the condition of applying a certain pressure from the upper and lower dies. This limits the deformation of the workpiece and improves the accuracy of the finished product after quenching. Current press quenching equipment has a variety of structural forms: one is a rotary furnace heating press quenching equipment set, and the other is an induction heating press quenching equipment set. There are also many structures for press quenching machines, each with its own characteristics in terms of precision control. The commonality is that the accuracy of the workpiece is basically guaranteed by the accuracy of the machine tool itself; for example, the well-known EMA induction quenching press quenching machine abroad requires that the coaxiality and end face runout of the upper and lower die spindles must be guaranteed to be within 0.015; the press quenching equipment produced by domestic manufacturers also requires that the parallelism of the upper and lower die interfaces must be controlled within 0.02. The accuracy of the machine tool needs to be maintained regularly to ensure the accuracy of the workpiece. This is difficult for machine tool manufacturing and will also increase certain manufacturing costs; If the surface of the workpiece is uneven or there is a problem with the accuracy of the machine tool, the processing quality of the workpiece will be affected during the press quenching process. Summary of the Invention

[0003] In view of this, the present invention aims to propose a press quenching device that can efficiently control the flatness of the synchronizer, so as to effectively ensure the parallelism of the upper and lower dies of the workpiece and make up for the lack of precision of the machine tool.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows: A press quenching device for efficiently controlling the flatness of a synchronizer comprises a press quenching upper die body, a die limiting plate, a die slide and an elastic component; One end of the die limiting plate is provided with a limiting structure, so that a T-shaped through hole is formed in the middle of the die limiting plate, and further the two ends of the die limiting plate are formed into a large round end and a small round end respectively; The top circumferential surface of the die slide is provided with a limiting frustum; The die slide is sleeved into the die limiting plate, and the limiting table and the limiting structure of the die limiting plate form a limiting fit; The press-quenching upper die body is fixedly mounted to the upper end surface of the die limiting plate, and the press-quenching upper die body is also provided with an elastic component; The elastic component is arranged in contact with the upper end surface of the die slide; Applying a force to the bottom end of the die slide can realize the movement or reset of the die slide relative to the press-quenching upper die body.

[0005] Furthermore, a plurality of evenly distributed mounting grooves are provided on the inner side of the top of the press-quenching upper die body; a pin mounting through hole is provided at the bottom of the mounting groove, and fixing screw holes are provided on both sides of the pin mounting through hole; The pin mounting through hole is a stepped hole.

[0006] Furthermore, the elastic component includes a support pin, a pressure spring and a pressure spring stopper; the support pin is provided with a limiting ring, and the limiting ring cooperates with the stepped structure of the pin mounting through hole to limit the support pin; the upper part of the limiting ring of the support pin is sleeved with the pressure spring; The compression spring stopper is connected to the fixing screw hole through a screw and is installed in the installation slot.

[0007] Furthermore, in the initial state, the top of the pressure spring is 5-6 mm higher than the top surface of the pin mounting through hole.

[0008] Furthermore, a limiting groove is provided at the bottom of the compression spring stopper, and the end of the compression spring is arranged in the limiting groove.

[0009] Furthermore, the top surface of the compression spring stopper fixed to the limit position is lower than the upper end surface of the press-quenching upper die body.

[0010] Furthermore, the fitting clearance between the die limiting plate and the die slide is between 0.15-0.20 mm.

[0011] Furthermore, the lower surface of the limiting cone of the die slide is a, the upper end surface of the press-quenching upper die body is b, and the parallelism between a and b is controlled within 0.025; The upper end surface of the die slide is x, and the lower end surface of the die slide is y, then the parallelism among a, x, and y is controlled within 0.015.

[0012] Furthermore, the number of the installation slots is 4.

[0013] Furthermore, an upper die connecting plate is provided on the top of the press-quenching upper die body, and corresponding detection through holes are provided on the upper die connecting plate and the upper die body. A probe is set in the detection through hole. When the die slide moves in the die limit plate and contacts the press-quenching upper die body, the probe is triggered to alarm.

[0014] Compared with the prior art, the press quenching device for efficiently controlling synchronizer flatness described in the present invention has the following advantages: (1) The present invention provides a press quenching device for efficiently controlling the flatness of a synchronizer, which can compensate for the uneven surface of a workpiece or the inaccurate precision of a machine tool that occurs during the press quenching process, complete the press quenching treatment of the workpiece, and improve the processing quality of the workpiece.

[0015] (2) The present invention provides a press quenching device for efficiently controlling the flatness of a synchronizer. The manufacturing cost is low and the press quenching quality of the workpiece can be well controlled. By setting a probe, an error prevention function is played. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings: Figure 1 This is a schematic diagram of a press quenching device for efficiently controlling synchronizer flatness according to an embodiment of the present invention; Figure 2 A cross-sectional view of a press quenching device for efficiently controlling synchronizer flatness according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the press-quenching upper die body according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the probe installation according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the operation of a press quenching device for efficiently controlling synchronizer flatness according to an embodiment of the present invention.

[0017] Description of reference numerals: 1. Press-quenching upper die body; 11. Mounting groove; 12. Pin mounting through hole; 2. Die limit plate; 3. Die slide; 31. Limiting table; 4. Elastic component; 41. Support pin; 42. Pressure spring; 43. Pressure spring stopper; 431. Limiting groove; 44. Limiting ring; 5. Upper die connecting plate; 6. Lower die processing platform; 7. Probe. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0020] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0021] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0022] A press quenching device for efficiently controlling the flatness of synchronizers, such as Figure 1-5 As shown, it includes a press-quenching upper die body 1, a die limiting plate 2, a die slide 3 and an elastic component 4; One end of the die limiting plate 2 is provided with a limiting structure, so that a T-shaped through hole is formed in the middle of the die limiting plate 2, and further the two ends of the die limiting plate 2 are formed into a large round end and a small round end respectively; The top circumferential surface of the die slide 3 is provided with a limiting circular platform 31; The die slide 3 is sleeved into the die limiting plate 2, and the limiting cone 31 forms a limiting fit with the limiting structure of the die limiting plate 2; The press-quenching upper die body 1 is fixedly mounted to the upper end surface of the die limiting plate 2, and the press-quenching upper die body 1 is further provided with an elastic component 4; The elastic component 4 is arranged in contact with the upper end surface of the die slide 3; Applying a force to the bottom end of the die slide 3 can realize the movement or reset of the die slide 3 relative to the press-quenching upper die body 1 .

[0023] Preferably, a plurality of evenly distributed mounting grooves 11 are provided on the inner side of the top of the press-quenching upper die body 1; a pin mounting through hole 12 is provided at the bottom of the mounting groove 11, and fixing screw holes are provided on both sides of the pin mounting through hole 12; The pin mounting through hole 12 is a stepped hole.

[0024] Preferably, the elastic component 4 includes a support pin 41, a pressure spring 42 and a pressure spring stopper 43; the support pin 41 is provided with a limiting ring 44, and the limiting ring 44 cooperates with the stepped structure of the pin mounting through hole 12 to limit the support pin 41; the upper part of the limiting ring 44 of the support pin 41 is sleeved with the pressure spring 42; The compression spring stopper 43 is connected to the fixing screw hole by screws and installed in the installation slot 11.

[0025] Preferably, in the initial state, the top of the pressure spring 42 is 5 mm higher than the top surface of the pin installation through hole 12. At this time, after assembly, the support pin 41 will apply a certain preload force to the die slide 3; Because the press-quenching upper die body 1, the die limit plate 2, and the die slide 3 are all manufactured with good form and position tolerance accuracy; therefore, the parallelism of the upper end face of the press-quenching upper die body 1 and the lower end face of the die slide 3 will also be very good; it can be easily controlled within 0.03mm.

[0026] Preferably, a limiting groove 431 is provided at the bottom of the compression spring stopper 43 , and the end of the compression spring 42 is disposed in the limiting groove 431 .

[0027] Preferably, the top surface of the compression spring stopper 43 fixed to the limit position is lower than the upper end surface of the press-quenching upper die body 1 .

[0028] Preferably, the clearance between the die limit plate 2 and the die slide 3 is between 0.15-0.20 mm. This clearance allows the lower end surface of the upper die slide to swing approximately 0.05 mm as it moves within the limit plate. This means that the parallelism between the upper die connection plate 5 and the end surface of the lower die processing platform 6 of the machine tool itself does not exceed 0.05 mm. During actual machining, the combined upper die working surface can ideally approach zero contact with the upper end surface of the workpiece. This reduces the workpiece's dependence on the machine tool's own precision.

[0029] Preferably, the lower surface of the limiting cone 31 of the die slide 3 is a, the upper end surface of the press-quenching upper die body 1 is b, and the parallelism between a and b is controlled within 0.025; The upper end surface of the die slide 3 is x, and the lower end surface of the die slide 3 is y, then the parallelism between a, x, and y is controlled within 0.015; Preferably, the number of the mounting slots 11 is four.

[0030] Preferably, an upper die connection plate 5 is further provided on the top of the press-quenching upper die body 1. Corresponding detection through holes are provided on the upper die connection plate 5 and the upper die body. A probe 7 is provided in the detection through hole. When the die slide 3 moves in the die limit plate 2 and contacts the press-quenching upper die body 1, the probe 7 is triggered to generate an alarm. The probe 7 is connected to a controller.

[0031] like Figure 5 As shown, this device is used in conjunction with the product with patent number CN202123274472.0, entitled "A Ring Gear Sleeve Press Quenching Machine Tool", wherein the 4-upper mold in the patent is the press quenching device in this application; The main functions of press quenching are twofold: 1. The core mold of the lower mold processing platform 6 ensures the roundness and size of the workpiece under internal control; 2. The upper and lower dies are parallel and a certain pressure is pre-applied to ensure that the plane of the workpiece does not distort. This patent mainly studies the plane of the workpiece; When in use, install the heated workpiece on the lower die processing platform 6, control the device to move downward until the lower end surface of the die slide 3 contacts the upper end surface of the workpiece, and then continue to move downward 4-6mm to stop; at this time, Figure 2 As shown: the die slide 3 and the die limiting plate 2 are separated by 4-6 mm at surface a, that is, the force of the spring after being compressed by 4-6 mm finally presses on the upper end surface of the workpiece; Because the lower end surface of the die slide 3 can swing about 0.05 when it moves in the die limit plate 2; that is, the lower end surface of the die slide 3 can 100% contact and apply pressure to the upper end surface of the workpiece (the upper and lower dies of ordinary machine tools will have a non-parallelism of nearly 0.02 after installation, 0.05>0.02. The effect at this time is equivalent to quenching the workpiece under the pressure of two upper and lower dies with a parallelism close to 0). This function can compensate for the poor plane control of the workpiece caused by insufficient machine tool precision; When adjusting the machine tool, when the downward stop position of the press-quenching upper mold body 1 is too low and reaches the floating limit of the support pin 41, the die slide 3 will contact the press-quenching upper mold body 1, and the 0.05mm swing function of the die slide 3 in the die limit plate 2 will fail; but at this time the probe 7 will detect it and alarm, prompting the operator to readjust the stop position of the compression upper mold body 1 (that is, move the stop position up a little to avoid the limit position) to avoid poor control of the workpiece flatness due to rigid contact.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A press quenching device for efficiently controlling synchronizer flatness, characterized by: It includes a press-quenching upper die body, a die limiting plate, a die slide and an elastic component; One end of the die limiting plate is provided with a limiting structure, so that a T-shaped through hole is formed in the middle of the die limiting plate, and further the two ends of the die limiting plate are formed into a large round end and a small round end respectively; The top circumferential surface of the die slide is provided with a limiting frustum; The die slide is sleeved into the die limiting plate, and the limiting table and the limiting structure of the die limiting plate form a limiting fit; The press-quenching upper die body is fixedly mounted to the upper end surface of the die limiting plate, and the press-quenching upper die body is also provided with an elastic component; The elastic component is arranged in contact with the upper end surface of the die slide; Applying a force to the bottom end of the die slide can realize the movement or reset of the die slide relative to the press-quenching upper die body.

2. The press quenching device for efficiently controlling synchronizer flatness according to claim 1, characterized in that: The top inner side of the press quenching upper die body is provided with a plurality of evenly distributed mounting grooves; the bottom of the mounting groove is provided with a pin mounting through hole, and both sides of the pin mounting through hole are provided with fixing screw holes; The pin mounting through hole is a stepped hole.

3. The press quenching device for efficiently controlling synchronizer flatness according to claim 2, characterized in that: The elastic component includes a support pin, a pressure spring and a pressure spring stopper; the support pin is provided with a limiting ring, and the limiting ring cooperates with the stepped structure of the pin mounting through hole to limit the support pin; the upper part of the limiting ring of the support pin is sleeved with the pressure spring; The compression spring stopper is connected to the fixing screw hole through a screw and is installed in the installation slot.

4. The press quenching device for efficiently controlling synchronizer flatness according to claim 3, characterized in that: In the initial state, the top of the pressure spring is 5-6 mm higher than the top surface of the pin mounting through hole.

5. The press quenching device for efficiently controlling synchronizer flatness according to claim 3, characterized in that: A limiting groove is provided at the bottom of the compression spring stopper, and the end of the compression spring is arranged in the limiting groove.

6. The press quenching device for efficiently controlling synchronizer flatness according to claim 3, characterized in that: The top surface of the compression spring stopper fixed to the limit position is lower than the upper end surface of the press-quenching upper die body.

7. The press quenching device for efficiently controlling synchronizer flatness according to claim 1, characterized in that: The matching clearance between the die limiting plate and the die slide is between 0.15-0.20 mm.

8. The press quenching device for efficiently controlling synchronizer flatness according to claim 1, characterized in that: The lower surface of the limiting cone of the die slide is a, the upper end surface of the press-quenching upper die body is b, and the parallelism between a and b is controlled within 0.025; The upper end surface of the die slide is x, and the lower end surface of the die slide is y, then the parallelism among a, x, and y is controlled within 0.

015.

9. The press quenching device for efficiently controlling synchronizer flatness according to claim 2, characterized in that: The number of the mounting slots is 4.

10. The press quenching device for efficiently controlling synchronizer flatness according to claim 1, characterized in that: The top of the press-quenching upper die body is also provided with an upper die connecting plate, and corresponding detection through holes are provided on the upper die connecting plate and the upper die body. A probe is set in the detection through hole. When the die slide moves in the die limit plate and contacts the press-quenching upper die body, the probe is triggered to alarm.

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