Heating device for piston encapsulation, heating method

Abstract

The application discloses a heating device and a heating method for piston encapsulation, and relates to the manufacturing field of automobile shock absorbers. The technical scheme is as follows: a multi-temperature-zone heating furnace, a side moving mechanism and a servo-driven lifting mechanism are arranged. The servo-driven lifting mechanism can send the workpiece into the heating cavity from the bottom and make it stepwise ascend, so that the accumulation heating of multiple workpieces in the furnace is realized. In addition, a product lifting mechanism is arranged. The end cover of the mechanism descends to seal the heating cavity during heating, and the adsorption part on the end cover is used to grab the finished product after the heating is completed. The application changes the serial processing into the efficient parallel processing mode through the accumulation heating, greatly improves the production efficiency and the output per unit time, simultaneously seals the furnace cavity during heating, effectively prevents the heat loss, reduces the energy consumption, guarantees the product quality, and simplifies the equipment and reduces the cost through the integrated material taking structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of manufacturing automobile shock absorbers, in particular to a heating device for piston rubberizing and a heating method. BACKGROUND

[0002] Chinese patent application CN112248459A discloses a piston rubberizing production line. In the disclosed technical solution, a forming device is provided for forming a pre-rubberized piston ring. The forming device is provided with a partition heating mechanism and a cooling and shaping mechanism. The pre-rubberized piston ring sequentially passes through the processes of heating, cooling and cooling and shaping. After completing all the forming processes, the production line uses a transfer device, specifically a first robot, to transfer the piston ring in the cooling and shaping mechanism to a finished product conveying line.

[0003] In this scheme, the pre-rubberized piston ring sequentially passes through the processes of heating, cooling and cooling and shaping in one cycle, and only one product can be processed in one cycle. In a serial processing mode, the total production cycle of one product is the simple addition of all process times, such as total time = heating time + cooling time + cooling and shaping time + transfer time. All mechanisms of the entire device serve only one product at the same time period, and other mechanisms are in a long waiting state without production, resulting in low final output efficiency of the device.

[0004] Moreover, in order to facilitate the first robot to extend into and pick up the finished product, the upper outlet of the cooling and shaping mechanism and even the entire heating and forming channel must be kept open. This structural design causes heat to continuously dissipate from the upper opening during the heating process. The dissipation of heat not only causes waste of energy and reduces heating efficiency, but also may affect the temperature uniformity in the heating cavity due to the temperature difference between the top and the middle and lower parts, thereby potentially adversely affecting the forming quality of the product. Moreover, in order to make up for the heat loss and ensure that the workpiece can reach the predetermined process temperature, a longer heating time is often set, which further prolongs the production cycle of a single product and reduces the overall output efficiency. SUMMARY

[0005] The purpose of the present application is to provide a heating device for piston rubberizing, which improves production efficiency and product quality by realizing stack heating of workpieces and closed processing of the heating process, and simplifies the device structure and reduces manufacturing cost.

[0006] The above technical purpose of the present application is achieved by the following technical solution:

[0007] A heating device for piston rubberizing, comprising:

[0008] a multi-temperature-zone heating furnace having a furnace body and a heating cavity in the furnace body for the workpiece to pass up and down;

[0009] A side moving mechanism is arranged below the multi-zone heating furnace to deliver workpieces to the multi-zone heating furnace;

[0010] Further comprising:

[0011] A servo-driven lifting mechanism is arranged below the heating cavity to deliver workpieces into the heating cavity and stepwise lift them in the heating cavity to realize the stacked heating of multiple workpieces in the heating cavity;

[0012] A product lifting mechanism is arranged above the multi-zone heating furnace and comprises an end cover, an adsorption part arranged on the end cover, and a lifting mechanism for lifting the end cover;

[0013] When the workpieces are heated in the heating cavity, the end cover is lowered to seal the upper part of the heating cavity to form a closed heating space; and when the uppermost workpiece in the heating cavity is heated to completion and is lifted to a taking position by the servo-driven lifting mechanism, the end cover is lifted and uses the adsorption part to grab the workpiece;

[0014] A product pushing mechanism is arranged below the multi-zone heating furnace and comprises a linear driving mechanism and a pushing block driven by the linear driving mechanism to push the workpiece grabbed by the product lifting mechanism.

[0015] Further arranged: the multi-zone heating furnace further comprises a lower die plate, an upper die plate, and at least two guide columns; the lower die plate is a fixed part, and the guide columns are vertically fixed on the lower die plate; the main body of the multi-zone heating furnace is carried on the upper die plate, and the upper die plate is slidingly fitted on the guide columns.

[0016] Further arranged: the heating cavity is divided into a heating zone and a shaping and heat preservation zone from bottom to top, and multiple workpieces are arranged in the heating zone and the shaping and heat preservation zone respectively.

[0017] Further arranged: the side moving mechanism comprises:

[0018] a bracket;

[0019] a guide rail fixed on the bracket;

[0020] a sliding block slidingly fitted on the guide rail;

[0021] a clamping jaw for clamping the workpiece, which is installed on the sliding block;

[0022] and a linear reciprocating mechanism for driving the sliding block to reciprocate along the direction of the guide rail.

[0023] Further arrangement: further comprising a product position carrying mechanism; the product position carrying mechanism comprises a vertically liftable second top material rod, which is arranged below the clamping jaw, and is used to lift the workpiece to be processed from below and place it in the clamping jaw.

[0024] Further arrangement: further comprising a product position detection mechanism; the product position detection mechanism comprises a vertically movable lifting rod, and a sensor installed at the end of the lifting rod; the lifting rod is used to drive the sensor to descend above the workpiece in the side material moving mechanism, so as to detect the position and posture of the workpiece.

[0025] Further arrangement: the sensor is an optical sensor, a proximity switch or a CCD camera.

[0026] Another object of the present application is to provide a heating method for piston encapsulation, comprising the following steps:

[0027] S1: using the product position carrying mechanism to place the workpiece to be heated on the side material moving mechanism;

[0028] S2: using the side material moving mechanism to transport the workpiece to be heated below the heating cavity of the multi-temperature zone heating furnace;

[0029] S3: carrying out stack heating of the workpiece, which comprises the following sub-steps:

[0030] S31: using the end cover of the product lifting mechanism to descend to seal the upper part of the heating cavity;

[0031] S32: using the servo-driven lifting mechanism to lift the workpiece to be heated from below and send it into the bottom of the heating cavity;

[0032] S33: driving the servo-driven lifting mechanism to descend and reset, and returning the side material moving mechanism to its initial position;

[0033] S34: driving the servo-driven lifting mechanism again to lift the workpiece in the heating cavity upward by one station;

[0034] S4: when the workpiece on the uppermost layer is heated and lifted to the material taking position, using the end cover of the product lifting mechanism to rise and grasp the workpiece with its suction part;

[0035] S5: using the product pushing mechanism to push out the workpiece grasped by the product lifting mechanism.

[0036] Further arrangement: the heating cavity is sequentially divided into a heating zone and a shaping and heat preservation zone from bottom to top, and the heating zone and the shaping and heat preservation zone are respectively arranged with multiple workpieces; and in the S34 step, the workpieces sequentially pass through the heating zone and the shaping and heat preservation zone in the process of stack heating.

[0037] Further arrangement: in S1, when the workpiece is placed on the side moving mechanism, the position and posture of the workpiece are detected, and S2 is executed after the detection is passed;

[0038] In the detection step, the posture of the workpiece is determined by judging whether a trigger signal is generated at a predetermined detection position using a photoelectric sensor or a proximity switch.

[0039] Alternatively, the image of the workpiece is captured by a CCD camera, and the posture of the workpiece is determined by analyzing the image.

[0040] In summary, the present application has the following advantages:

[0041] First, in the present application, the servo drive lifting mechanism is adopted, and the step-by-step rising and stacking heating of the workpiece in the heating cavity are realized, which fundamentally solves the low efficiency problem caused by the single-piece serial processing mode in the prior art. The processing flow is changed to a continuous, pipeline-like parallel processing mode. When a workpiece at the upper part of the heating cavity is at the end of heating or waiting to be taken out, multiple workpieces at the beginning or middle of heating are simultaneously accommodated below. This greatly improves the time utilization rate of the heating cavity, increases the number of effective workpieces processed in the same time by several times, and greatly improves the time utilization rate of the equipment and the output per unit time.

[0042] Second, in the present application, a product lifting mechanism is added, which includes an end cover and an adsorption part. During heating, the end cover is lowered to seal and form a closed heating space, effectively preventing heat loss and ensuring that the entire stacking heating process is carried out in a closed and stable thermal environment. This not only significantly reduces energy consumption, but also ensures the uniformity of heating and the stability of the process, which helps to improve the forming quality of the final product. At the same time, the stable thermal environment can effectively shorten the time required to reach the target process temperature, further improving production efficiency. When taking out the material, the mechanism directly uses the adsorption part on the end cover to grab the workpiece, which is more simple and economical than the multi-axis robot used for taking out the material in the prior art, reducing equipment cost and maintenance difficulty.

[0043] Thirdly, in the present application, by setting the multi-temperature zone heating furnace as a structure containing a lower die plate, an upper die plate and guide columns, in which the lower die plate and the guide columns jointly constitute a high-precision fixed base and positioning reference. The upper die plate carrying the furnace body can be conveniently slid out upward and slid in downward along the guide columns. When replacing the shaping cavity of different products, the operator does not need to wait for the furnace body to cool for a long time, but can directly hoist and replace the entire high-temperature multi-temperature zone heating furnace as a whole with a previously prepared new module. Therefore, the entire production change process can be completed within a few minutes, greatly shortening the waiting time of the production line, and significantly improving the comprehensive utilization rate of the equipment and the flexible production capacity of responding to multi-variety orders.

[0044] Fourthly, in the present application, by further dividing the heating cavity into a heating zone and a shaping and heat preservation zone on the basis of the accumulation heating, and making multiple workpieces stay in the two zones in sections, all the workpieces are moved upward synchronously in the jacking process of S34. The workpieces located in the lower part are rapidly heated in the heating zone with higher temperature to complete the plasticization and preliminary coating of the material; as the position is raised, the workpieces enter the shaping and heat preservation zone with more stable temperature control, and sufficient solidification and internal stress elimination are performed in this zone. By setting a special heating zone, higher temperature can be used for rapid heating to complete the plasticization stage of the material in the shortest time. The subsequent shaping and heat preservation stage which takes more time can be performed at a more energy-saving stable temperature. This process optimization shortens the total residence time required for each workpiece to achieve the best physical performance. The shortening of the total processing time required by each workpiece means that the jacking action of S34 can be performed at a higher frequency, thereby directly improving the production rhythm and final output of the entire machine. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 is a schematic diagram of the perspective structure of the heating device for piston coating;

[0046] Figure 2 is a schematic diagram of the perspective structure of the heating device for piston coating;

[0047] Figure 3 is a schematic diagram of the perspective structure of the heating device for piston coating; Figure 2

[0048] Figure 4 is a schematic diagram of the structure of the multi-temperature zone heating furnace.

[0049] In the figure, 100, multi-temperature zone heating furnace; 101, lower die plate; 102, guide column; 103, upper die plate; 104, heating cavity; 105, heating zone; 106, shaping and heat preservation zone; 107, furnace body;

[0050] 200, servo-driven jacking mechanism; 201, first material lifting rod; 210, servo driver;​

[0051] 300, side moving mechanism; 301, support; 302, guide rail; 303, sliding block; 304, clamping jaw; 305, linear reciprocating mechanism;

[0052] 400, product position carrying mechanism; 401, second ejector rod;

[0053] 500, product position detection mechanism; 501, lifting rod; 502, sensor;

[0054] 600, product pushing mechanism; 601, linear driving mechanism; 602, pushing block;

[0055] 700, product lifting mechanism; 701, end cover; 702, suction part; 710, lifting mechanism. DETAILED DESCRIPTION

[0056] The application will be further described in detail below with reference to the accompanying drawings.

[0057] In the description of the application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0058] A heating device for piston encapsulation, referring to Figures 1-3 The device can realize continuous and efficient heating treatment of multiple workpieces. The heating device mainly includes a multi-temperature zone heating furnace 100, a side moving mechanism 300, a servo-driven lifting mechanism 200, a product lifting mechanism 700 and a product pushing mechanism 600.

[0059] Specifically, the multi-temperature zone heating furnace 100 has an internally hollow furnace body 107, and a heating cavity 104 for the workpiece to pass through inside is arranged in the furnace body 107. The function of the side moving mechanism 300 is to horizontally transport the workpiece to be processed to the directly below the multi-temperature zone heating furnace 100, and to position and feed for the subsequent heating process.

[0060] In this embodiment, the servo-driven lifting mechanism 200 includes a first lifting rod 201 and a servo driver 210 for powering the first lifting rod 201. In order to realize efficient continuous production, the servo driver 210 can accurately control the first lifting rod 201 to perform a step-by-step lifting action. Each time a new workpiece is sent to the bottom of the heating cavity 104, the step-by-step lifting action can synchronously lift all other workpieces already existing in the heating cavity 104 by one station, thereby realizing layered and time-sharing accumulation heating of multiple workpieces in the limited heating cavity 104, greatly improving the production efficiency of the equipment.

[0061] Referring to Figures 3-4 In this embodiment, the product lifting mechanism 700 is arranged above the multi-temperature-zone heating furnace 100, which includes an end cover 701, a lifting mechanism 710 for lifting the end cover 701, and an adsorption part 702 arranged on the end cover 701. The product lifting mechanism 700 has a dual function: first, when the workpieces in the furnace are heated, the lifting mechanism 710 drives the end cover 701 to descend to tightly close the upper part of the heating cavity 104, forming a closed heating space, which effectively prevents heat loss and ensures the efficiency and uniformity of heating. Second, when the workpiece on the uppermost layer in the heating cavity 104 is heated and lifted to the material taking position by the servo-driven lifting mechanism 200, the lifting mechanism 710 drives the end cover 701 to rise, and the adsorption part 702 acts to grab the workpiece, completing the taking-out operation of the finished product.

[0062] The specific structure of the adsorption part 702 is not limited, which can adopt various forms according to factors such as the material, shape and weight of the workpiece.

[0063] In a preferred embodiment, the adsorption part 702 is a vacuum chuck. Specifically, one or more vacuum chucks made of high-temperature-resistant silica gel material can be arranged on the lower surface of the end cover 701. When it is necessary to grab the workpiece, negative pressure is generated by a vacuum generating device, and the workpiece is firmly adsorbed on the chuck by atmospheric pressure. This way is soft and will not damage the surface of the workpiece, and is widely applicable.

[0064] In another embodiment, when the workpiece itself is a magnetic material such as steel or iron, the adsorption part 702 can also be an electromagnet. By energizing the electromagnet coil when it is necessary to grab, a strong magnetic force can be generated to attract the workpiece, and the magnetic force disappears after power-off, so that the workpiece can be released. This way has fast response speed and large clamping force.

[0065] Of course, in other embodiments, for example, a micro pneumatic or electric mechanical gripper can also realize the workpiece grabbing function.

[0066] After the finished product is taken out, the product pushing mechanism 600 performs the last unloading action. The product pushing mechanism 600 includes a linear driving mechanism 601 and a pushing block 602 driven by the linear driving mechanism 601. When the product lifting mechanism 700 grabs the workpiece and moves to the designated position, the linear driving mechanism 601 drives the pushing block 602 to smoothly push the workpiece out of the suction part 702 of the product lifting mechanism 700 and send it to the next station or the finished product area.

[0067] In order to realize the rapid change of equipment and improve the production flexibility, in the preferred embodiment of the present application, the multi-temperature zone heating furnace 100 is designed as a modular structure.

[0068] Referring to Figures 1-2 , specifically, the modular structure includes a lower template 101, an upper template 103, and at least two guide columns 102. The lower template 101 is installed on the equipment rack as a fixed base, and the at least two guide columns 102 are vertically fixed on the lower template 101 as positioning and guiding reference. The furnace body 107 of the multi-temperature zone heating furnace 100 is installed on the upper template 103, and the upper template 103 is sleeved on the guide column 102 in a sliding fit manner through the corresponding through hole. Through this design, the entire heating furnace unit, i.e. the part including the upper template 103 and the furnace body 107, can be easily hoisted upwards or slid downwards along the guide column 102 as an independent module, thereby realizing the rapid replacement operation without waiting for the equipment to cool down, and greatly shortening the downtime of the changeover.

[0069] Referring to Figure 4 , along the upward path of the workpiece driven by the servo-driven lifting mechanism 200 in the heating cavity 104, the heating cavity 104 is divided into at least two functionally different temperature zones from bottom to top, i.e. a heating zone 105 at the lower part and a shaping and heat preservation zone 106 at the upper part. The total height of the heating cavity 104 is designed to be able to accommodate a stack composed of multiple workpieces at the same time, so that at any moment, part of the workpieces are in the heating zone 105 and part of the workpieces are in the shaping and heat preservation zone 106.

[0070] Through this layout, when the servo-driven lifting mechanism 200 lifts the entire stack by one station, the workpiece can first experience rapid temperature rise and plasticization in the heating zone 105 and then enter the shaping and heat preservation zone 106 for sufficient solidification and stress relief in a continuous flow. This assembly line type multi-stage heat treatment process can accurately execute the ideal temperature curve required by the material, thereby significantly improving the dimensional stability and mechanical properties of the product.

[0071] In a specific embodiment, the structure of the side moving mechanism 300 is limited to realize the stable and accurate translation of the workpiece.

[0072] Referring to Figure 1 Specifically, the side moving mechanism 300 includes a bracket 301 as its installation base. One or more guide rails 302 are horizontally fixed on the bracket 301, and a sliding block 303 is arranged on the guide rail 302 in a sliding fit manner, thereby forming a set of linear motion guide mechanism.

[0073] A gripper 304 for directly clamping the workpiece is installed on the upper part of the sliding block 303 and moves together with it. In order to drive the linear motion, a linear reciprocating mechanism 305 is also provided, the power output end of which is connected with the sliding block 303, for driving the sliding block 303 together with the gripper 304 on it to reciprocate along the path set by the guide rail 302. Through the above structure, the side moving mechanism 300 can accurately grasp the workpiece from the feeding position and smoothly deliver it directly below the heating furnace.

[0074] In order to realize the reciprocating motion of the sliding block 303, the linear reciprocating mechanism 305 can adopt various specific embodiments, and its specific structure is not uniquely limited, and can be selected according to the requirements of production speed, positioning accuracy and cost, etc. In one embodiment, the linear reciprocating mechanism 305 can be a cylinder driving mechanism. In another embodiment, in order to realize more accurate position and speed control, the linear reciprocating mechanism 305 can be an electric cylinder driving mechanism.

[0075] Referring to Figure 3 In a specific embodiment, a product position carrying mechanism 400 is further included, which includes a second lifting rod 401 capable of performing vertical lifting action. The installation position of the second lifting rod 401 corresponds to the gripper 304 of the side moving mechanism 300 in the vertical direction and is located below it. When the gripper 304 of the side moving mechanism 300 moves to the feeding station and opens, the second lifting rod 401 can lift a workpiece to be processed from below and accurately send it into the clamping range of the gripper 304. After the workpiece is stably clamped by the gripper 304, the second lifting rod 401 is lowered to reset, thereby completing a workpiece handover and feeding operation.

[0076] In the product position carrying mechanism 400, the power for driving the second lifting rod 401 to lift and lower can be a cylinder driving mechanism or an electric cylinder driving mechanism.

[0077] In order to prevent the problems such as jamming, equipment damage and scrap products caused by improper placement of the workpiece in the tooling of the side moving mechanism 300 during the subsequent lifting process, the device is further provided with a product position detection mechanism 500.

[0078] The product position detection mechanism 500 includes a lifting rod 501 that can perform vertical reciprocating motion, and a sensor 502 installed at the end of the lifting rod 501. When the workpiece is placed on the side moving mechanism 300, the lifting rod 501 will drive the sensor 502 to move from top to bottom to the vicinity of the workpiece, detect its position and posture, and then rise and reset, and the side moving mechanism 300 will transport the workpiece to the lower side of the multi-zone heating furnace 100.

[0079] The specific type of the sensor 502 is not limited, and can be selected according to the requirement of detection accuracy. In an embodiment, the sensor 502 can be a photoelectric sensor or a proximity switch. By controlling the lifting rod 501 to descend to a preset height, whether the workpiece exists or is severely tilted can be judged according to whether the sensor 502 senses the workpiece at the height. In another embodiment, the sensor 502 can be a CCD camera or other machine vision component. By shooting the image of the workpiece and performing algorithm analysis, not only the position and posture of the workpiece can be judged, but also the specific model, rotation angle and even the presence or absence of foreign matter on the surface of the workpiece can be identified, so that more comprehensive mistake-proofing detection is realized. By setting the product position detection mechanism 500, the stability and reliability of the entire equipment operation are greatly improved.

[0080] A heating method for piston encapsulation, comprising the following steps:

[0081] First, loading and positioning: at the beginning of production, the product position handling mechanism 400 first acts to pick up a workpiece to be heated and place it on the tooling of the side moving mechanism 300. Then, the side moving mechanism 300 starts to horizontally transport the workpiece to be heated to the lower side of the heating cavity 104 of the multi-zone heating furnace 100 and accurately positions it, preparing for heating.

[0082] Next, the core accumulation heating cycle is executed: the heating cycle is completed through a series of independent sub-steps. At the beginning of the heating process, the end cover 701 of the product lifting mechanism 700 will first descend to seal the upper opening of the heating cavity 104, so as to form a closed heating space that is conducive to heat preservation.

[0083] When a workpiece to be heated is transported to the lower side of the heating cavity 104, the servo-driven lifting mechanism 200 starts to perform the first lifting action to send the workpiece into the bottom of the heating cavity 104 from below.

[0084] Then, the servo-driven lifting mechanism 200 descends to reset, and at the same time, the side moving mechanism 300 also returns to its initial position to prepare for handling and transporting the next workpiece.

[0085] After that, the servo-driven lifting mechanism 200 will be activated again to perform a second lifting action, lifting the entire stack of workpieces in the heating chamber 104 by one workpiece height. By repeating the above steps, a stack of workpieces that continuously moves upwards can be formed in the heating chamber 104, realizing continuous stack heating.

[0086] Finally, the finished product is discharged: when a workpiece has been lifted multiple times to the top layer of the stack and completed the entire heating process, the end cap 701 of the product lifting mechanism 700 will be unsealed and lifted, and the adsorption part 702 on it will grab the workpiece that has completed the heating. Finally, the product pushing mechanism 600 acts to push the workpiece out of the product lifting mechanism 700 and send it to the finished product area.

[0087] The above steps are coordinated by the controller to form a complete and automated production cycle.

[0088] In order to achieve more precise heat treatment process for workpieces and further optimize the final physical properties of the product, in the preferred embodiment of the present application, the internal structure of the heating chamber 104 is further limited.

[0089] Specifically, along the path of the workpiece being lifted in the heating chamber 104, the heating chamber 104 is divided into different temperature zones from bottom to top, such as a heating zone 105 for rapid heating and a shaping and holding zone 106 for stable structure. Since the heating chamber 104 can accommodate multiple workpieces in a stacked state at the same time, at any time, a portion of the workpieces are located in the heating zone 105 and another portion of the workpieces are located in the shaping and holding zone 106.

[0090] In the above steps, when the servo-driven lifting mechanism 200 is activated again to lift the entire stack of workpieces by one workpiece height, the workpieces located in the middle of the stack will transition from the lower heating zone 105 to the upper shaping and holding zone 106. Through this assembly line type of segmented heating, it can be ensured that each workpiece can go through the two key stages of rapid plasticization and holding and curing. This design enables the entire heating method to accurately match the ideal process curve required by the material, thereby significantly improving the dimensional stability and mechanical properties of the product.

[0091] In order to ensure that only correctly positioned workpieces can enter the subsequent heating process, thereby avoiding production abnormalities that may be caused by incorrect workpiece posture from the source, the method adds a detection step.

[0092] Specifically, after the product position carrying mechanism 400 places the workpiece on the side moving mechanism 300, and before the side moving mechanism 300 starts conveying, the product position detection mechanism 500 first detects the workpiece. Only when the detection result is qualified, the controller authorizes the execution of the S2 step, otherwise the process is interrupted and an alarm is given.

[0093] The detection step can be implemented in various ways. In one embodiment, the detection can be completed by using a photoelectric sensor or a proximity switch. By judging whether the sensor 502 can generate a normal trigger signal when it is lowered to a predetermined detection position, it is determined whether the posture of the workpiece is correct, for example, whether there is a serious tilt. In another preferred embodiment, the detection can be completed by using a CCD camera. By taking an image of the workpiece and analyzing the image by the controller, it is more accurate to judge whether the position, tilt and rotation angle of the workpiece are correct, so as to achieve more comprehensive mistake-proofing detection.

[0094] The above embodiments are only explanations of the present application, which are not limitations of the present application. Those skilled in the art can make modifications to the embodiments without creative contribution after reading the specification, as long as the modifications are within the scope of the claims of the present application and are protected by the patent law.

Claims

1. A heating device for rubber coating of pistons, comprising: A multi-temperature zone heating furnace (100) has a furnace body (107) and a heating chamber (104) located inside the furnace body (107) for workpieces to pass through vertically; A side-moving material mechanism (300) is used to transport the workpiece to the area below the multi-temperature zone heating furnace (100); Its characteristic is that it further includes: A servo-driven lifting mechanism (200) is used to feed the workpiece from below into the heating chamber (104) and make it rise step by step in the heating chamber (104) to realize the stacked heating of multiple workpieces in the heating chamber (104); The product lifting mechanism (700) is located above the multi-temperature zone heating furnace (100) and includes an end cover (701), an adsorption part (702) provided on the end cover (701), and a lifting mechanism (710) for lifting the end cover (701). When the workpiece is heated in the heating chamber (104), the end cap (701) descends to seal the upper part of the heating chamber (104), forming a closed heating space; and when the uppermost workpiece in the heating chamber (104) is heated and lifted to the picking position by the servo-driven lifting mechanism (200), the end cap (701) rises and uses its adsorption part (702) to grab the workpiece. The product pushing mechanism (600) includes a linear drive mechanism (601) and a pusher (602) driven by the linear drive mechanism (601) for pushing out the workpiece gripped by the product lifting mechanism (700).

2. The heating device for piston coating according to claim 1, characterized in that: The multi-temperature zone heating furnace (100) further includes a lower template (101), an upper template (103), and at least two guide pillars (102); the lower template (101) is a fixing component, and the guide pillars (102) are vertically fixed on the lower template (101); the main body of the multi-temperature zone heating furnace (100) is supported by the upper template (103), and the upper template (103) is slidably fitted onto the guide pillars (102).

3. The heating device for piston coating according to claim 1, characterized in that: The heating chamber (104) is divided into a heating zone (105) and a shaping and heat preservation zone (106) from bottom to top, and multiple workpieces are arranged in the heating zone (105) and the shaping and heat preservation zone (106) respectively.

4. The heating device for piston coating according to claim 1, characterized in that: The side-moving material mechanism (300) includes: Stent (301); The guide rail (302) is fixed on the bracket (301); A slider (303) is slidably mounted on the guide rail (302); A gripper (304) for holding the workpiece is mounted on the slider (303); And a linear reciprocating mechanism (305) for driving the slider (303) to reciprocate along the direction of the guide rail (302).

5. The heating device for piston coating according to claim 4, characterized in that: It also includes a product positioning and conveying mechanism (400); the product positioning and conveying mechanism (400) includes a second lifting rod (401) that can be vertically lifted and lowered, the second lifting rod (401) is disposed below the gripper (304) and is used to lift the workpiece to be processed from bottom to top and place it in the gripper (304).

6. The heating device for piston coating according to claim 1, characterized in that: It also includes a product position detection mechanism (500); the product position detection mechanism (500) includes a vertically movable lifting rod (501) and a sensor (502) installed at the end of the lifting rod (501); the lifting rod (501) is used to drive the sensor (502) down to above the workpiece in the side moving material mechanism (300) to detect the position and posture of the workpiece.

7. The heating device for piston coating according to claim 6, characterized in that: The sensor (502) is a photoelectric sensor, a proximity switch, or a CCD camera.

8. The heating method of the heating device for piston rubber coating according to any one of claims 1-7, characterized in that, Includes the following steps: S1: Using the product position handling mechanism (400), place the workpiece to be heated on the side moving material mechanism (300); S2: Using the side-moving material mechanism (300), the workpiece to be heated is transported to the area below the heating chamber (104) of the multi-temperature zone heating furnace (100); S3: Perform cumulative heating on the workpiece, which includes the following sub-steps: S31: The end cap (701) of the product lifting mechanism (700) is lowered to seal the upper part of the heating chamber (104); S32: Using a servo-driven lifting mechanism (200), the workpiece to be heated is lifted from below and sent to the bottom of the heating chamber (104); S33: Drive the servo drive lifting mechanism (200) to descend and reset, and cause the side moving material mechanism (300) to return to its initial position; S34: Drive the servo-driven lifting mechanism (200) again to lift the workpiece in the heating chamber (104) upward by one position; S4: When the workpiece located on the top layer is heated and lifted to the material picking position, the end cap (701) of the product lifting mechanism (700) is used to rise and the workpiece is picked up by its adsorption part (702). S5: Using the product pushing mechanism (600), push out the workpiece grabbed by the product lifting mechanism (700).

9. The heating method according to claim 8, characterized in that: The heating chamber (104) is divided into a heating zone (105) and a shaping and heat preservation zone (106) from bottom to top. Multiple workpieces are arranged in the heating zone (105) and the shaping and heat preservation zone (106) respectively. In step S34, the workpieces pass through the heating zone (105) and the shaping and heat preservation zone (106) in sequence during the stacking heating process.

10. The heating method according to claim 8, characterized in that: In step S1, when the workpiece is placed on the upper side of the side moving material mechanism (300), the position and posture of the workpiece are detected, and step S2 is executed after the detection is passed. The detection steps specifically involve using a photoelectric sensor or proximity switch to determine whether a trigger signal is generated at a predetermined detection position to ascertain whether the workpiece's posture is correct. Alternatively, an image of the workpiece can be captured using a CCD camera, and the image can be analyzed to determine whether the workpiece's orientation is correct.

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