Micro shaft part heat treatment device

Abstract

The utility model provides a heat treatment device for miniature shaft parts, and relates to the field of heat treatment. The station switching mechanism comprises an index plate rotationally arranged on the rack as well as a feeding station, a quenching station, a tempering station and a discharging station which are uniformly and sequentially arranged around the center of the index plate, and each station comprises a clamping seat rotationally arranged above the index plate and a driven wheel arranged below the index plate and fixedly connected with the clamping seat; the rotating mechanism comprises a rotating motor, a belt, a tensioning wheel and a driving wheel, the rotating motor is fixedly arranged on the rack, the driving wheel and the tensioning wheel are located on the outer side of the index plate, the driving wheel is fixedly connected with an output shaft of the rotating motor, and the belt is in transmission connection with the driving wheel, the tensioning wheel and the driven wheels on the quenching station and the tempering station. Due to the fact that the transfer of the parts among the stations is completed through sequential switching of the index plate, the transfer time is shortened, collision of the parts is avoided, and the stability and the consistency of the whole heat treatment process are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat treatment, in particular to a heat treatment device for micro shaft parts. Background Art

[0002] In the heat treatment process of micro shaft parts, it generally includes two main stages: quenching and tempering. First, the micro shaft parts are placed in a special quenching device, and their hardness is significantly increased by rapid cooling. However, the parts after quenching need to be transferred to a tempering device for low-temperature tempering treatment to release internal stress and improve toughness. However, this transfer process has significant problems.

[0003] Since micro shaft parts are usually small in size, the transfer process is extremely likely to cause bumps or scratches, especially when dealing with mass production. This mechanical damage not only affects the final quality of the parts, but also may lead to uneven heat treatment, thereby reducing the performance of the parts. At the same time, the transfer process is time-consuming, greatly reducing the heat treatment efficiency. In addition, during the transfer process, the parts may lose a part of their temperature, resulting in uneven distribution of heat in the tempering device and affecting the tempering effect. Moreover, each temperature change between devices and the inconsistency of the processing time will make the overall heat treatment process unstable, ultimately resulting in inconsistent part quality. This reduction in efficiency not only affects production efficiency but also increases manufacturing costs. Summary of the Utility Model

[0004] In view of this, the utility model provides a heat treatment device for micro shaft parts to reduce the risk of damage during the transfer process of micro shaft parts and improve the overall efficiency and surface quality consistency of heat treatment.

[0005] The technical solution of the utility model is realized as follows:

[0006] The utility model provides a heat treatment device for micro shaft parts, including:

[0007] A frame;

[0008] A station switching mechanism, including an indexing plate rotatably arranged on the frame and a loading station, a quenching station, a tempering station, and an unloading station arranged in a uniform and sequential manner around the center of the indexing plate. The loading station, the quenching station, the tempering station, and the unloading station all include a clamping seat rotatably arranged above the indexing plate and a driven wheel arranged below the indexing plate and fixedly connected to the clamping seat;

[0009] The positioning mechanism includes a fixed plate and a first axial positioning assembly and a second axial positioning assembly installed on the top surface of the fixed plate. The fixed plate is located above the indexing plate and is fixedly connected to the frame. The first axial positioning assembly is used to cooperate with the clamping seat on the quenching station to axially position the shaft parts to be quenched. The second axial positioning assembly is used to cooperate with the clamping seat on the tempering station to axially position the shaft parts to be tempered.

[0010] The rotating mechanism includes a rotating motor, a belt, a tensioner and a driving wheel. The rotating motor is fixedly arranged on the frame, the driving wheel is located outside the dividing plate and is fixedly connected to the output shaft of the rotating motor, the tensioner is rotatably arranged on the frame and is located on one side of the driving wheel, and the belt is transmission-connected to the driving wheel, the tensioner and the driven wheels on the quenching station and the tempering station.

[0011] On the basis of the above technical solution, preferably, a divider, a rotating sleeve and a support rod are further provided between the dividing plate and the frame, the divider is fixedly arranged on the frame, one end of the support rod is fixedly connected to the central fixed part of the divider, and the other end movably passes through the dividing plate and is fixedly connected to the fixed plate, the rotating sleeve is sleeved on the support rod, the upper end of which is fixedly connected to the dividing plate, and the lower end of which is fixedly connected to the rotating part of the divider.

[0012] On the basis of the above technical solution, preferably, the clamping seat includes a mounting sleeve, a waterproof cover and a rotating shaft, the rotating shaft is rotatably connected to the fixed disk through a bearing, the lower end of the rotating shaft is fixedly connected to the driven wheel, the upper end of the rotating shaft passes through the top of the fixed disk and is fixedly connected to the mounting sleeve, the mounting sleeve is used for vertically inserting shaft parts, the waterproof cover is located above the fixed disk and is fixedly arranged between the mounting sleeve and the rotating shaft.

[0013] On the basis of the above technical scheme, preferably, the first axial positioning assembly and the second axial positioning assembly have the same structure, both including a column, a second lifting cylinder, an upper center point, a sliding sleeve and a fixed sleeve, the fixed sleeve is fixedly arranged at the top of the column, the sliding sleeve is vertically inserted in the fixed sleeve, the second lifting cylinder is fixedly arranged on the column or the fixed sleeve, and is used to drive the sliding sleeve to move up and down relative to the fixed sleeve, the upper end of the center point is rotatably connected to the lower end of the sliding sleeve, and the lower end of the center point is used to cooperate with the clamping seat on the quenching station or the tempering station to perform axial positioning of shaft parts.

[0014] On the basis of the above technical solution, preferably, it also includes a clamping assembly, which includes a first lifting cylinder and a clamping piece. The first lifting cylinder is fixedly arranged on a fixed plate, and is used to drive the clamping piece to move downward to press down the top of the shaft part on the clamping seat in the loading station.

[0015] On the basis of the above technical solution, preferably, the station switching mechanism further includes a drying station, which is located between the quenching station and the tempering station, and each station is evenly distributed on the indexing plate. The structure of the drying station is the same as that of the quenching station, and the driven wheel on the drying station is connected to the belt drive;

[0016] It further includes a drying component, which includes a first mounting rack and a first blowing nozzle. The first mounting rack is vertically and fixedly arranged on the fixed plate, and the first blowing nozzle is used for blowing and drying the shaft parts to be tempered on the drying station.

[0017] On the basis of the above technical solution, preferably, the station switching mechanism further includes a tempering and cooling station, which is located between the tempering station and the blanking station, and each station is evenly distributed on the indexing plate. The structure of the tempering and cooling station is the same as that of the quenching station, and the driven wheel on the tempering and cooling station is connected to the belt drive;

[0018] It further includes a cooling component, which includes a second mounting rack and a spray disc. The second mounting rack is vertically and fixedly arranged on the fixed plate, and the spray disc is fixedly arranged on the second mounting rack, and is used for spraying and cooling the shaft parts directly above the tempering and cooling station.

[0019] On the basis of the above technical solution, preferably, the cooling component further includes a second blowing nozzle, which is fixedly arranged on the second mounting rack and is used for blowing and drying the shaft parts on the tempering and cooling station.

[0020] Furthermore, preferably, it further includes a first induction heater and a second induction heater fixedly arranged outside the machine frame. The first induction heater is used for heating and quenching the shaft parts on the quenching station, and the second induction heater is used for heating and tempering the shaft parts on the tempering station.

[0021] Furthermore, preferably, it further includes a manipulator arranged outside the machine frame, which is used for performing the loading and unloading operations of the shaft parts at the loading station and the unloading station respectively.

[0022] The utility model has the following beneficial effects compared with the prior art:

[0023] (1) For the heat treatment device for micro shaft parts disclosed by the utility model, by arranging each station on the same indexing plate, the parts do not need to be transferred between different devices, thus significantly reducing the risk of knocking and scratching and improving the final quality of the parts. Since the transfer of the parts between each station is completed by sequential switching of the indexing plate, the transfer time is reduced, and the efficiency reduction caused by heat loss during the transfer process is reduced. At the same time, the stability and consistency of the overall heat treatment process are improved.

[0024] (2) By setting up the drying station and drying components, the water stains on the surface of the parts after quenching can be effectively removed, ensuring surface dryness during the tempering process and avoiding quality problems caused by water stains. By adding a drying station on the indexing plate, continuous drying can be achieved during the heat treatment process, improving production efficiency and reducing downtime.

[0025] (3) The setting of the tempering and cooling station enables the shaft parts to be spray-cooled at a dedicated station after tempering, avoiding the problem of water stain splashing caused by heating and cooling simultaneously, and improving the uniformity of surface heating. Through the spray disc for cooling treatment, the shaft parts can be effectively and evenly cooled, shortening the cooling time and preventing quality problems caused by uneven cooling. Setting the cooling process independently at a dedicated station reduces the interference that may be caused by cooling at the tempering station, maintaining the stability and consistency of the production process. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a first-perspective three-dimensional structural schematic diagram of the heat treatment device for micro shaft parts disclosed by the present invention;

[0028] Figure 2 It is a second-perspective three-dimensional structural schematic diagram of the heat treatment device for micro shaft parts disclosed by the present invention;

[0029] Figure 3 It is Figure 1 The partial enlarged view at A in

[0030] Figure 4 It is the top view of the heat treatment device for micro shaft parts disclosed by the present invention;

[0031] Figure 5 It is Figure 4 The plane cross-sectional view at B-B in

[0032] Reference Signs:

[0033] 1. Frame; 2. Station switching mechanism; L1. Loading station; L2. Quenching station; L3. Drying station; L4. Tempering station; L5. Tempering and cooling station; L6. Unloading station; 21. Indexing plate; 22. Clamping seat; 23. Driven wheel; 3. Positioning mechanism; 31. Fixed plate; 32. First axial positioning component; 33. Second axial positioning component; 4. Rotating mechanism; 41. Rotation motor; 42. Belt; 43. Tensioning pulley; 44. Driving wheel; 5. Divider; 51. Rotating sleeve; 52. Support rod; 221. Mounting sleeve; 222. Waterproof cover; 223. Rotating shaft; 321. Column; 322. Second lifting cylinder; 323. Upper center point; 324. Sliding sleeve; 325. Fixed sleeve; 34. Pressing component; 341. Second lifting cylinder; 342. Pressing piece; 6. Drying component; 61. First mounting frame; 62. First blowing nozzle; 7. Cooling component; 71. Second mounting frame; 72. Spraying disc; 73. Second blowing nozzle; G1. First induction heater; G2. Second induction heater; S. Shaft parts. Detailed implementation mode

[0034] Next, in combination with the implementation mode of the present utility model, the technical solutions in the implementation mode of the present utility model will be clearly and completely described. Obviously, the described implementation mode is only a part of the implementation modes of the present utility model, rather than all the implementation modes. Based on the implementation modes in the present utility model, all other implementation modes obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present utility model.

[0035] As Figure 1 shown, in combination with Figure 2 、 4 and 5, the embodiment of the present utility model discloses a heat treatment device for micro shaft parts, including a frame 1, a station switching mechanism 2, a positioning mechanism 3 and a rotating mechanism 4.

[0036] Among them, the frame 1 is used to provide a support and installation foundation, which is arranged inside the heat treatment equipment and is used in cooperation with other mechanisms.

[0037] The station switching mechanism 2 includes an indexing plate 21 and a loading station L1, a quenching station L2, a tempering station L4 and an unloading station L6 arranged evenly and sequentially around the center of the indexing plate 21. Among them, the indexing plate 21 is rotatably arranged on the frame 1 and is responsible for rotating and switching each station. The loading station L1 is used for loading the micro shaft parts to be processed, the quenching station L2 is used for heating and quenching the shaft parts, the tempering station L4 is used for heating and tempering the shaft parts, and the unloading station L6 is used for unloading the shaft parts after tempering.

[0038] In this embodiment, the loading station L1, the quenching station L2, the tempering station L4, and the unloading station L6 each include a clamping seat 22 rotatably disposed above the indexing plate 21 and a driven wheel 23 disposed below the indexing plate 21 and fixedly connected to the clamping seat 22. Among them, the clamping seat 22 is used to mount shaft parts in the vertical direction. Specifically, one end of the shaft part is vertically inserted into the clamping seat 22, and the driven wheel 23 is used to drive the clamping seat 22 to rotate.

[0039] The positioning mechanism 3 includes a fixed disk 31, a first axial positioning component 32 and a second axial positioning component 33 mounted on the top surface of the fixed disk 31. The fixed disk 31 is located above the indexing plate 21 and fixedly connected to the frame 1. The first axial positioning component 32 is used to cooperate with the clamping seat 22 at the quenching station L2 to axially position the shaft part to be quenched, and the second axial positioning component 33 is used to cooperate with the clamping seat 22 at the tempering station L4 to axially position the shaft part to be tempered.

[0040] For the convenience of loading and unloading, the shaft part is vertically inserted into the clamping seat 22. However, since the clamping seat 22 only restricts the lower end of the shaft, and there is no restriction on the upper end. During the heating process of the shaft part, rotation is required. With only the lower end restricted, when the shaft part rotates, its upper end will swing, affecting the surface heating quality. Therefore, in this embodiment, by setting the first axial positioning component 32 and the second axial positioning component 33, it can be ensured that the shaft part is axially positioned by cooperating with the clamping seat 22 at the quenching station L2 and the tempering station L4 respectively, ensuring stability and reliability during the heating process.

[0041] To ensure that the clamping seat 22 is in a rotating state during the quenching and tempering processes of the shaft part, facilitating scanning heating, and at the same time, ensuring that the clamping seat 22 is in a stationary state at the loading station L1 and the unloading station L6, facilitating the loading and unloading operations of the manipulator, this embodiment is realized by the rotating mechanism 4.

[0042] Specifically, the rotating mechanism 4 includes a rotating motor 41, a belt 42, a tensioning wheel 43, and a driving wheel 44. The rotating motor 41 is fixedly arranged on the frame 1. The driving wheel 44 is located outside the indexing plate 21 and fixedly connected to the output shaft of the rotating motor 41. The tensioning wheel 43 is rotatably arranged on the frame 1 and is located on one side of the driving wheel 44. The belt 42 is in transmission connection with the driving wheel 44, the tensioning wheel 43, and the driven wheels 23 at the quenching station L2 and the tempering station L4.

[0043] According to the configuration, the belt 42 is only connected to the driving wheel 44, the tensioning wheel 43 and the driven wheel 23 on the quenching station L2 and the tempering station L4, and is not connected to the driven wheel 23 on the loading station L1 and the unloading station L6. The rotating motor 41 drives the driving wheel 44 to rotate, and the driving wheel 44 drives the driven wheel 23 on the quenching station L2 and the tempering station L4 to rotate through the belt 42. The belt 42 can be tightened by the tensioning wheel 43 to ensure sufficient transmission force. At the same time, by setting the tensioning wheel 43, the belt 42 can be stretched to avoid contact with the driven wheel 23 on the loading station L1 and the unloading station L6. As a result, when the belt 42 is transmitting, only the quenching station L2 and the tempering station L6 are connected. The driven wheel 23 on the station L4 is rotating, so that it can be ensured that the shaft parts are always in a rotating state during heating quenching and heating tempering, which is conducive to uniform heating and processing. After the loading station L1 completes the loading of the shaft parts, the dividing plate 21 switches one station in sequence. At this time, the loading station L1 switches to the quenching station L2, thereby realizing that the shaft parts are heated and quenched in the quenching station L2. After the quenching station L2 completes the heating and quenching, the quenching station L2 switches to the tempering station L4. After the heating and tempering operation is completed, the tempering station L4 switches to the unloading station L6. The shaft parts on the unloading station L6 can be transferred. After the unloading station L6 switches to the loading station L1, the loading operation continues, and the cycle is repeated.

[0044] The heat treatment device for micro shaft parts disclosed in the utility model sets each station on the same indexing plate 21, and the parts do not need to be transferred between different devices, thereby significantly reducing the risk of bumps and scratches and improving the final quality of the parts. Since the transfer of parts between the stations is completed by the sequential switching of the indexing plate 21, the transfer time is reduced and the efficiency reduction caused by heat loss during the transfer process is reduced. At the same time, the stability and consistency of the overall heat treatment process are improved.

[0045] In order to enable the dividing plate 21 to switch workstations sequentially, in this embodiment, a divider 5, a rotating sleeve 51 and a support rod 52 are further provided between the dividing plate 21 and the frame 1. The divider 5 is fixedly arranged on the frame 1, one end of the support rod 52 is fixedly connected to the central fixed part of the divider 5, and the other end movably passes through the dividing plate 21 and is fixedly connected to the fixed plate 31. The rotating sleeve 51 is sleeved on the support rod 52, the upper end of which is fixedly connected to the dividing plate 21, and the lower end of which is fixedly connected to the rotating part of the divider 5.

[0046] By setting the support rod 52, the fixed disk 31 can be fixed above the dividing disk 21, and the fixed disk 31 can be kept in a fixed position. In this embodiment, the dividing disk 21 and the support rod are rotatably connected, and the dividing disk 21 is connected to the rotating part on the divider 5 through the rotating sleeve 51. Therefore, the divider 5 realizes equal-angle rotation of the dividing disk 21 through the rotating sleeve 51.

[0047] In this embodiment, the clamping seat 22 includes a mounting sleeve 221, a waterproof cover 222 and a rotating shaft 223. The rotating shaft 223 is rotatably connected to the fixed disk 31 through a bearing. The lower end of the rotating shaft 223 is fixedly connected to the driven wheel 23. The upper end of the rotating shaft passes through the top end of the fixed disk 31 and is fixedly connected to the mounting sleeve 221. The mounting sleeve 221 is used for vertically inserting shaft parts to ensure that the parts maintain a stable position during processing. In this embodiment, the top end of the mounting sleeve 221 has a mounting groove for the shaft parts to be inserted. The waterproof cover 222 is located above the fixed disk 31 and is fixedly arranged between the mounting sleeve 221 and the rotating shaft 223 to prevent moisture or other liquids from affecting the internal components of the device.

[0048] In order to achieve axial positioning of the shaft parts, in this embodiment, the first axial positioning assembly 32 and the second axial positioning assembly 33 have the same structure, and both include a column 321, a first lifting cylinder, an upper center 323, a sliding sleeve 324 and a fixed sleeve 325. The fixed sleeve 325 is fixedly arranged at the top end of the column 321. The sliding sleeve 324 is vertically inserted into the fixed sleeve 325. The first lifting cylinder is fixedly arranged on the column 321 or the fixed sleeve 325 and is used to drive the sliding sleeve 324 to move up and down relative to the fixed sleeve 325. The upper end of the center is rotatably connected to the lower end of the sliding sleeve 324. The lower end of the center is used to cooperate with the clamping seat 22 at the quenching station L2 or the tempering station L4 to axially position the shaft parts.

[0049] With this setting, when switching workstations, the first lifting cylinder drives the sliding sleeve 324 to move upward along the fixed sleeve 325, and then drives the upper center 323 to move upward, so that there is enough operating space in the height direction between the upper center 323 and the clamping seat 22. When the workstation is switched to the quenching or tempering station L4, at this time, the first lifting cylinder drives the sliding sleeve 324 to move downward along the fixed sleeve 325, and then drives the upper center 323 to move downward. The upper center 323 abuts against the top end of the shaft part on the clamping seat 22, so as to achieve axial positioning of the shaft part. During the rotation of the clamping seat 22, since the upper end of the upper center 323 is rotatably connected to the sliding sleeve 324, therefore, the upper center 323, the shaft part and the clamping seat 22 as a whole can perform a rotation operation.

[0050] Since in the feeding process, most of the feeding is carried out by a manipulator, the shaft parts may be not properly clamped in position after feeding. For example, they are not inserted in place on the clamping seat 22, or there is a slight deviation during insertion, which will cause uneven quenching during the subsequent heating and quenching process.

[0051] Therefore, the positioning mechanism 3 of this embodiment further includes a pressing component 34. Refer to the appendix Figure 3As shown, the clamping assembly 34 includes a second lifting cylinder 341 and a clamping member 342. The second lifting cylinder 341 is fixedly arranged on the fixed plate 31, and is used to drive the clamping member 342 to move downward to press down the top of the shaft parts on the clamping seat 22 in the loading station L1. When the shaft loading operation is completed at the loading station L1, the second lifting cylinder 341 will immediately drive the clamping member 342 to move downward, and apply downward pressure to the shaft parts on the clamping seat 22 to ensure that the shaft parts are accurately inserted into the clamping seat 22, thereby ensuring the position reliability of the shaft parts after the initial loading.

[0052] Since high temperature is used in the heating and quenching process, it is necessary to spray cool the shaft parts. After the shaft parts are sprayed, there will be water stains on the surface. When low-temperature heating and tempering are performed, the water stains may cause surface spots or uneven heat treatment effects during the tempering process, affecting the appearance and performance of the parts. The evaporation of water stains during the low-temperature heating and tempering process may cause drastic temperature changes, induce thermal stress inside the parts, and increase the risk of deformation or cracking.

[0053] To this end, in this embodiment, a drying station L3 is further provided between the quenching station L2 and the tempering station L4, and each station is evenly distributed on the indexing plate 21. The structure of the drying station L3 is the same as that of the quenching station L2, and the driven wheel 23 on the drying station L3 is transmission-connected to the belt 42. Thus, during the operation of the device, the clamping seat 22 on the drying station L3 is always in a rotating state, and the station is used to dry the parts during the heat treatment process to prevent the influence of residual water stains on the tempering effect.

[0054] In order to dry the water stains on the surface of the parts, a drying component 6 is also included, and the drying component 6 includes a first mounting frame 61 and a first blowing nozzle 62. The first mounting frame 61 is vertically fixed on the fixed plate 31, and the first blowing nozzle 62 is used to blow and dry the shaft parts to be tempered on the drying station L3. In this embodiment, the wind blown out of the air outlet of the blowing nozzle is in the shape of an air curtain, and the surface water stains are blown away by strong wind to speed up the drying process.

[0055] By adopting the above technical solution, the setting of the drying station L3 can effectively remove water stains on the surface of the parts after quenching, ensure the surface dryness during the tempering process, and avoid quality problems caused by water stains. By adding the drying station L3 on the indexing plate 21, continuous drying can be achieved during the heat treatment process, improving production efficiency and reducing downtime.

[0056] In this example, the shaft parts on the tempering station L4 only need to be tempered by low-temperature heating. After the heating and tempering are completed, the surface of the shaft parts needs to be cooled.

[0057] Some implementation methods are to directly heat and cool at the tempering station L4 through a heating device. This method will cause water splashing, thereby affecting the uniformity of heating the shaft surface.

[0058] To this end, in this embodiment, a tempering cooling station L5 is further provided between the tempering station L4 and the unloading station L6. The stations are evenly distributed on the dividing plate 21. The structure of the tempering cooling station L5 is the same as that of the quenching station L2. The driven wheel 23 on the tempering cooling station L5 is connected to the belt 42 for transmission to ensure stable rotation of the shaft parts in the cooling station.

[0059] It also includes a cooling component 7, which includes a second mounting frame 71 and a spray plate 72. The second mounting frame is vertically fixed on the fixed plate 31, and the spray plate 72 is fixed on the second mounting frame 71 for spray cooling of shaft parts directly above the tempering cooling station L5.

[0060] The setting of the tempering cooling station L5 allows the shaft parts to be spray-cooled at a special station after tempering, avoiding the problem of water splashing caused by heating and cooling, and improving the uniformity of surface heating. The cooling treatment through the spray plate 72 can effectively and evenly cool the shaft parts, shorten the cooling time, and prevent quality problems caused by uneven cooling. The cooling process is independently set in a special station, which reduces the interference that may be caused by cooling at the tempering station L4, and maintains the stability and consistency of the production process.

[0061] When cooling is completed, water stains will remain on the surface of the shaft, which may cause the surface of the shaft parts to be wet and there is a risk of oxidation.

[0062] To this end, the present embodiment configures the cooling assembly 7 to further include a second blowing nozzle 73, wherein the second blowing nozzle 73 is fixedly disposed on the second mounting frame 71 and is used for blowing and drying the shaft parts on the tempering cooling station L5.

[0063] The second blowing nozzle 73 accelerates the drying process of the shaft parts by blowing air, further removes surface moisture, and ensures that the parts are in a dry state after cooling. The blowing nozzle is used in conjunction with the spray plate 72 to achieve dual processing of cooling and drying, thereby improving the efficiency and processing quality of the cooling station.

[0064] In this embodiment, it also includes a first induction heater G1 and a second induction heater G2 fixedly arranged on the outside of the frame 1. The first induction heater G1 is used to heat and quench the shaft parts on the quenching station L2, and the second induction heater G2 is used to heat and temper the shaft parts on the tempering station L4.

[0065] It should be noted that the first induction heater G1 and the second induction heater G2 are conventional devices in the field of induction heating, and this embodiment does not limit them.

[0066] In this embodiment, it further includes a manipulator disposed outside the frame 1, which is used to perform the loading and unloading operations of shaft parts at the loading station L1 and the unloading station L6 respectively, thereby realizing the automatic loading and unloading of micro shaft parts and improving the production efficiency.

[0067] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A heat treatment device for micro shaft parts, characterized in that, Comprising: A frame (1); A station switching mechanism (2), including an indexing plate (21) rotatably arranged on the frame (1) and a loading station (L1), a quenching station (L2), a tempering station (L4) and an unloading station (L6) arranged in a uniform order around the center of the indexing plate (21). Clamping seats (22) rotatably arranged above the indexing plate (21) and driven wheels (23) arranged below the indexing plate (21) and fixedly connected to the clamping seats (22) are included on the loading station (L1), the quenching station (L2), the tempering station (L4) and the unloading station (L6); A positioning mechanism (3), including a fixed disk (31) and a first axial positioning component (32) and a second axial positioning component (33) installed on the top surface of the fixed disk (31). The fixed disk (31) is located above the indexing plate (21) and fixedly connected to the frame (1). The first axial positioning component (32) is used to cooperate with the clamping seat (22) on the quenching station (L2) to axially position the shaft parts to be quenched, and the second axial positioning component (33) is used to cooperate with the clamping seat (22) on the tempering station (L4) to axially position the shaft parts to be tempered; A rotating mechanism (4), including a rotating motor (41), a belt (42), a tensioning pulley (43) and a driving wheel (44). The rotating motor (41) is fixedly arranged on the frame (1). The driving wheel (44) is located outside the indexing plate (21) and fixedly connected to the output shaft of the rotating motor (41). The tensioning pulley (43) is rotatably arranged on the frame (1) and is located on one side of the driving wheel (44). The belt (42) is in transmission connection with the driving wheel (44), the tensioning pulley (43) and the driven wheels (23) on the quenching station (L2) and the tempering station (L4); 2. The heat treatment device for micro shaft parts according to claim 1, characterized in that: A dividing mechanism (5), a rotating sleeve (51) and a support rod (52) are further arranged between the indexing plate (21) and the frame (1). The dividing mechanism (5) is fixedly arranged on the frame (1). One end of the support rod (52) is fixedly connected to the central fixing part of the dividing mechanism (5), and the other end movably passes through the indexing plate (21) and is fixedly connected to the fixed disk (31). The rotating sleeve (51) is sleeved on the support rod (52), its upper end is fixedly connected to the indexing plate (21), and its lower end is fixedly connected to the rotating part of the dividing mechanism (5); 3. The heat treatment device for micro shaft parts according to claim 1, characterized in that: The clamping seat (22) includes a mounting sleeve (221), a waterproof cover (222) and a rotating shaft (223). The rotating shaft (223) is rotatably connected to the fixed disk (31) through a bearing. The lower end of the rotating shaft (223) is fixedly connected to the driven wheel (23). The upper end of the rotating shaft passes through the top end of the fixed disk (31) and is fixedly connected to the mounting sleeve (221). The mounting sleeve (221) is used for vertically inserting shaft parts. The waterproof cover (222) is located above the fixed disk (31) and is fixedly arranged between the mounting sleeve (221) and the rotating shaft (223); 4. The heat treatment device for micro shaft parts according to claim 3, characterized in that: The first axial positioning assembly (32) and the second axial positioning assembly (33) have the same structure, and both include a column (321), a first lifting cylinder (322), an upper top (323), a sliding sleeve (324) and a fixed sleeve (325); the fixed sleeve (325) is fixedly arranged at the top of the column (321); the sliding sleeve (324) is vertically inserted in the fixed sleeve (325); the first lifting cylinder (322) is fixedly arranged on the column (321) or the fixed sleeve (325) and is used to drive the sliding sleeve (324) to move up and down relative to the fixed sleeve (325); the upper end of the top is rotatably connected to the lower end of the sliding sleeve (324); the lower end of the top is used to cooperate with a clamping seat (22) on a quenching station (L2) or a tempering station (L4) to axially position the shaft parts.

5. The heat treatment device for micro shaft parts according to claim 3, characterized in that: The positioning mechanism (3) also includes a clamping assembly (34), which includes a second lifting cylinder (341) and a clamping piece (342). The second lifting cylinder (341) is fixedly arranged on the fixed plate (31) and is used to drive the clamping piece (342) to move downward so as to press down the top of the shaft part on the clamping seat (22) in the loading station (L1).

6. The heat treatment device for micro shaft parts according to claim 1, characterized in that: The station switching mechanism (2) further comprises a drying station (L3), the drying station (L3) being located between the quenching station (L2) and the tempering station (L4), and each station being evenly distributed on the indexing plate (21), the structure of the drying station (L3) being the same as that of the quenching station (L2), and the driven wheel (23) on the drying station (L3) being transmission-connected to the belt (42); The drying assembly (6) further comprises a drying assembly (6), wherein the drying assembly (6) comprises a first mounting frame (61) and a first blowing nozzle (62), wherein the first mounting frame (61) is vertically fixed on the fixed plate (31), and the first blowing nozzle (62) is used for blowing and drying the shaft parts to be tempered on the drying station (L3).

7. The heat treatment device for micro shaft parts according to claim 6, characterized in that: The station switching mechanism (2) further comprises a tempering and cooling station (L5), the tempering and cooling station (L5) being located between the tempering station (L4) and the unloading station (L6), and each station being evenly distributed on the indexing plate (21), the structure of the tempering and cooling station (L5) being the same as that of the quenching station (L2), and the driven wheel (23) on the tempering and cooling station (L5) being transmission-connected to the belt (42); The cooling assembly (7) further comprises a second mounting frame (71) and a spray plate (72), wherein the second mounting frame (71) is vertically fixed on the fixed plate (31), and the spray plate (72) is fixed on the second mounting frame (71) and is used for spray cooling the shaft parts directly above the tempering cooling station (L5).

8. The heat treatment device for micro shaft parts according to claim 7, characterized in that: The cooling assembly (7) further comprises a second blowing nozzle (73), which is fixedly arranged on the second mounting frame (71) and is used for blowing and drying the shaft parts on the tempering cooling station (L5).

9. The heat treatment device for micro shaft parts according to claim 1, characterized in that: It further includes a first induction heater (G1) and a second induction heater (G2) fixedly arranged outside the rack (1). The first induction heater (G1) is used for heating and quenching the shaft parts at the quenching station (L2), and the second induction heater (G2) is used for heating and tempering the shaft parts at the tempering station (L4).

10. The heat treatment device for micro shaft parts according to claim 1, characterized in that: It further includes a manipulator arranged outside the rack (1), which is used for respectively performing the loading and unloading operations of the shaft parts at the loading station (L1) and the unloading station (L6).

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