Multi-type sealing ring sharing type turning production processing technology

Abstract

The invention relates to the technical field of sealing ring turning production and machining processes, and particularly discloses a multi-type sealing ring sharing type turning production and machining process which comprises the following steps: putting main raw materials, auxiliary filler and auxiliaries into mixing equipment according to a component proportion, and mixing to form preparation raw materials; the preparation raw materials are added into forming equipment to be subjected to forming treatment, a semi-finished sealing element is prepared, and the forming equipment is one or more of pouring equipment, injection equipment, vulcanization equipment and pressing and sintering equipment; the semi-finished product sealing element is fixedly installed on a bearing main shaft of turning equipment, a first driving part of the turning equipment drives the bearing main shaft to drive the semi-finished product sealing element to rotate, and a second driving part of the turning equipment drives a machining tool of the turning equipment to conduct turning machining on the rotating semi-finished product sealing element. And processing the semi-finished sealing element into a finished sealing ring.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sealing ring turning production and processing, and particularly discloses a common-type turning production and processing for multiple types of sealing rings. BACKGROUND

[0002] In the sealing manufacturing industry, sealing rings, as key components, are widely used in many fields such as machinery, automobiles, aerospace, etc. With the continuous development of industrial technology, the market has increasingly diversified requirements for the types, specifications and performance of sealing rings. However, the traditional sealing ring production and processing technology is usually designed for a single type of sealing ring, and the production of different types of sealing rings often requires independent production lines and special equipment, resulting in repeated investment in equipment, complicated production processes, low production efficiency and high production costs. At the same time, in the existing sealing ring production process, the semi-finished product forming equipment has a single function, and it is difficult to realize flexible switching and collaborative work between different processes; in the turning processing link, the fixing method of the semi-finished sealing part lacks universality and cannot meet the clamping requirements of multiple types of sealing rings. Therefore, it has become an important issue for the industry to develop a turning production and processing technology that can be compatible with multiple types of sealing rings, improve equipment utilization, simplify production processes and ensure product quality. SUMMARY

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present application is to provide a common-type turning production and processing for multiple types of sealing rings.

[0004] To achieve the above-mentioned purpose, a common-type turning production and processing for multiple types of sealing rings according to the present application comprises the following steps:

[0005] S1. Raw material pretreatment: the main raw material, auxiliary filler and additives are mixed in a mixing device according to the component ratio to form a preparation raw material;

[0006] S2. Semi-finished product forming: the preparation raw material is added to a forming device for forming treatment to obtain a semi-finished sealing part; the forming device is one or more of a pouring device, an injection device, a vulcanization device and a pressing sintering device;

[0007] S3. Turning processing: the semi-finished sealing part is installed and fixed on a bearing main shaft of a turning device, a first driving member of the turning device drives the bearing main shaft to rotate the semi-finished sealing part, and a second driving member of the turning device drives a machining tool of the turning device to perform turning processing on the rotating semi-finished sealing part, thereby processing the semi-finished sealing part into a finished sealing ring.

[0008] The pouring device comprises a frame, a pouring component arranged on the frame, a feeding component, and a glue barrel connected with the pouring component, the glue barrel is used for containing and heating raw materials; the feeding component comprises a tray used for placing a semi-finished product seal, a feeding track arranged below the pouring component, and a mold placed on the tray, the tray with the mold is moved to below the pouring component through the feeding track; one end of a conveying pipeline of the glue barrel is sealingly connected with a glue outlet of the glue barrel, and the other end is sealingly connected with a glue inlet of the pouring component, so as to convey glue in the glue barrel to the pouring component and provide glue required by the pouring component; the pouring component comprises an electric drive and a pouring head, the electric drive drives the pouring head to pour the mold placed below the pouring component according to a preset pouring amount.

[0009] The frame supports the pouring component, the feeding component, and the glue barrel, forming a stable structure; the tray of the feeding component places the mold, and the feeding track moves the tray to below the pouring component, realizing automatic feeding and improving production efficiency; the glue barrel is connected with the pouring component through the sealing conveying pipeline, ensuring stable conveying of the glue; the electric drive of the pouring component drives the pouring head to accurately pour according to the preset pouring amount, ensuring the accuracy and consistency of the pouring amount, avoiding material waste, and improving product quality.

[0010] The injection device comprises a base, an injection component arranged on the base, and an injection cylinder; the injection cylinder comprises a moving guide rail, an injection mold reciprocally moving on the moving guide rail, and an ejection component, the drive drives the injection mold to move to one side close to the injection component, the injection component injects raw materials into the injection mold through an injection port of the injection mold, the injection mold moves to the other side away from the injection component and abuts against the ejection component, and the ejection component ejects the semi-finished product seal in the injection mold.

[0011] The injection device supports the injection component and the injection cylinder through the base, realizing efficient cooperation of raw material injection and molding. Its beneficial effects are as follows: the injection mold reciprocally moves along the moving guide rail, accurately positions to one side of the injection component to complete raw material injection, and then moves to the ejection component to realize automatic ejection, the whole process is smooth and continuous, and the production efficiency is greatly improved. First, the injection mold is placed on the moving guide rail, the drive is started to move the mold to one side of the injection component, the injection component injects raw materials (such as mixed raw materials of isocyanate and polyol) into the mold cavity at a set pressure (such as the pressure under the temperature of 50-90 ℃ barrel), and the pressure is maintained for a certain time to compensate shrinkage. Then, the drive moves the mold to the ejection component away from the injection component, the ejection component abuts against the mold to smoothly eject the semi-finished product seal after cooling and solidification. This automatic injection and ejection process reduces manual intervention and reduces errors, and is suitable for high-precision and large-batch seal ring production.

[0012] The vulcanization equipment comprises a rack, a heating flat plate assembly arranged on the rack, and a hydraulic drive system connected with the heating flat plate assembly; the heating flat plate assembly comprises a guide rod arranged on the rack, a first heating flat plate moving up and down along the guide rod, and a second heating flat plate arranged below the first heating flat plate; an output end of the hydraulic drive system is connected with the first heating flat plate; the hydraulic drive system drives the first heating flat plate to reciprocally move on the guide rod to approach or move away from the second heating flat plate to vulcanize the semi-finished sealing part placed on the second heating flat plate.

[0013] The heating flat plate assembly and the hydraulic drive system are supported by the rack to form a stable vulcanization structure. The hydraulic drive system drives the first heating flat plate to reciprocally move along the guide rod to approach or move away from the second heating flat plate, thereby vulcanizing the semi-finished sealing part placed on the second heating flat plate. The semi-finished sealing part is first placed on the second heating flat plate, and then the hydraulic drive system is started to drive the first heating flat plate to move downward along the guide rod to approach the second heating flat plate, so that the semi-finished sealing part is between the first heating flat plate and the second heating flat plate, and the heating flat plate assembly heats the semi-finished sealing part. The semi-finished sealing part is kept at a set temperature (such as 140-180℃) and pressure (such as 5-20MPa) for a certain time (several minutes to tens of minutes) to complete the vulcanization process. After the vulcanization is completed, the hydraulic drive system drives the first heating flat plate to move upward along the guide rod to move away from the second heating flat plate, so as to take out the vulcanized semi-finished sealing part. The vulcanization equipment has simple structure and convenient operation, and can efficiently and accurately complete the vulcanization process of the sealing part to improve the production efficiency and product quality.

[0014] The pressing and sintering equipment comprises a base, a pressing assembly arranged on the base, a sintering assembly, and a control center electrically connected with the pressing assembly and the sintering assembly; the pressing assembly comprises a support frame arranged on the base, guide columns arranged on both sides of the support frame, a mold positioning mechanism arranged at the bottom of the support frame, and a pressing dynamic device reciprocally moving on the guide columns; the pressing dynamic device comprises a hydraulic cylinder and a pressing mold head connected with an output end of the hydraulic cylinder; the hydraulic cylinder drives the pressing mold head to reciprocally move on the guide columns to approach or move away from the mold positioning mechanism to press the raw material into a semi-finished sealing part, and the pressed semi-finished sealing part is sent to the sintering assembly for sintering and forming.

[0015] The uniformly mixed PTFE powder, the filler and the lubricant (after drying and powder screening) are first loaded into a prefabricated mold of a mold positioning mechanism, a hydraulic cylinder is started by a control center, a hydraulic rod pushes a pressing mold head to move downward along a guide column, a set pressure (such as 5-20 MPa) is applied to the raw material in the mold to press and form; the pressed blank is sent to a sintering assembly by a mechanical arm, the control center is heated to 370-385 DEG C according to a preset program and is kept warm, so that the molecular interface is fused, and then gradually cooled to room temperature to form a crystalline phase dense blank; the blank is prevented from deforming during the cooling process by a deformation prevention mold (an outer mold sleeve, an inner mold core shaft and an elastic clamping ring), and finally a high-precision semi-finished sealing part that can be turned is obtained. The equipment realizes efficient production of PTFE-based sealing parts through the automatic linkage of pressing and sintering, and the finished product has excellent properties such as low friction and high and low temperature resistance.

[0016] The first carrier is detachably installed on the bearing spindle, the first driving member drives the first carrier to rotate, and the first carrier is provided with a fixing jig, and the semi-finished sealing part is fixed on the first carrier through the fixing jig to cooperate with a machining tool to perform turning.

[0017] The fixing jig comprises a base body, a blocking structure arranged on the base body and a plurality of positioning holes, an end surface of the semi-finished sealing part abuts against the base body, the blocking structure is used for blocking an outer side surface of the semi-finished sealing part, and a plurality of fasteners outside the world pass through the plurality of positioning holes to lock and fix the semi-finished sealing part on the base body.

[0018] The fixing jig comprises a cylindrical portion and an elastic portion arranged outside the cylindrical portion, the elastic portion comprises a plurality of groups of elastic ribs, the plurality of groups of elastic ribs are distributed in a circumferential direction outside the cylindrical portion, a circumferential included angle between adjacent two groups of elastic ribs is 15 DEG -60 DEG, and the semi-finished sealing part is sleeved on the cylindrical portion and abuts against the elastic ribs.

[0019] The fixing jig comprises a clamping portion and a pressing component arranged in the clamping portion; the pressing component comprises a pressing block, an elastic element and an adjusting screw; one end of the elastic element is fixedly connected with an inner wall of the clamping portion, the other end is connected with the pressing block, the elastic element provides an initial pressing force for the pressing block, the adjusting screw penetrates through a side wall of the clamping portion and is threadedly connected with the pressing block, and the semi-finished sealing part accommodated in the clamping portion is clamped and fixed by rotating the adjusting screw.

[0020] The base body stop structure jig is suitable for regular-shaped or regular-shaped sealers, has high fixing precision, and can bear large cutting force; the cylindrical elastic rib jig is suitable for annular or cylindrical sealers, and can be self-adapted to different inner diameters; the clamping and pressing part jig is suitable for special-shaped or high-precision sealers, can accurately control the clamping force through the screw rod, and avoids deformation.

[0021] According to the type of the sealer, the corresponding jig is installed on the first carrier. For example, for regular-shaped sealers, the base body jig is used, the end face of the base body is abutted against the base body, the stop structure is limited on the outside, and the fastener is locked through the positioning hole; the annular sealer is sleeved on the cylindrical part, and the elastic rib is automatically clamped; the special-shaped sealer is placed in the clamping part, and the rotary adjusting screw is clamped and fixed through the pressing block and the elastic element. Then, the first driving part drives the carrier to rotate, and the machining tool is used to turn the sealer to realize high-precision forming. Through the combination of the detachable carrier and the diversified jig, the design can meet the fixing requirements of multiple types of sealers, and the flexibility and reliability of turning are improved.

[0022] The S2 further includes S2.1

[0023] S2.1: After the semi-finished sealer made by the press sintering equipment is placed in the anti-deformation mold, it is placed in the cooling pool for cooling. The blank cooled by cold water is cooled and dried to room temperature; the anti-deformation mold includes a bearing base plate, a plurality of sleeve mandrels detachably connected with the bearing base plate, the bearing base plate is provided with a plurality of water passing holes penetrating through the bearing base plate, the plurality of sleeve mandrels include a plurality of first mandrels and a plurality of second mandrels, the outer diameters of the first mandrels and the second mandrels are different, and the semi-finished sealer is used to be sleeved on the outside of the first mandrel or the second mandrel.

[0024] Further, the anti-deformation mold includes an outer mold sleeve, an inner mold mandrel sleeved on the outer mold sleeve, and an elastic clamping ring sleeved on the outside of the outer mold sleeve, and the outer mold sleeve and the inner mold mandrel jointly clamp the blank to be cooled; the inner wall of the outer mold sleeve is provided with a plurality of prismatic protrusions, the surface of the prismatic protrusion is plated with hard chromium or sprayed with a wear-resistant coating, powder adhesion is prevented, and the prismatic protrusion and the contact surface of the blank to be cooled leave a heat dissipation channel.

[0025] The outer sleeve and the inner mold core form a bidirectional clamping structure, cooperates with the circumferential constraint force of the outer elastic clamping ring, and restricts the deformation of the blank during cooling and shrinkage in a "rigid support + elastic clamping" mode; the prismatic protrusions (surface plated with hard chromium or wear-resistant coating) reduce the contact area with the blank, not only reducing the risk of powder adhesion, but also accelerating heat conduction through the heat dissipation channels between the protrusions, making the cooling of the blank more uniform; the segmented process of cold water cooling and ventilation slow cooling first rapidly reduces the surface temperature of the blank, and then releases the internal stress through slow room temperature cooling, avoiding cracking or warping caused by excessive temperature difference. The high-temperature blank after sintering is quickly sleeved into the anti-deformation mold: the inner mold core is inserted into the inner hole of the blank, the outer mold sleeve wraps the outer periphery, and the outer side is tightly clamped with the elastic clamping ring (such as a spring steel ring), so that the prismatic protrusions are in contact with the surface of the blank and maintain a small gap (heat dissipation channel). Subsequently, the whole is placed in a cooling pool, and is rapidly cooled for 10-15 minutes through circulating cold water (water temperature 20-30℃), and is taken out after the surface temperature of the blank is reduced to 60-80℃, the elastic clamping ring is removed, and the blank is placed together with the outer mold sleeve and the inner mold core in a ventilated place (air speed 0.5-1m / s) for slow cooling to room temperature (about 2-4 hours). During this process, the wear-resistant coating of the prismatic protrusions prevents the blank powder from adhering to the mold, the heat dissipation channel ensures the cooling efficiency, and the three-layer mold structure controls the cooling deformation of the PTFE blank within 0.5% through the dual mechanisms of mechanical constraint and temperature control, providing high-precision blanks for subsequent turning.

[0026] The multi-type sealing ring shared turning production and processing technology further includes the following steps:

[0027] S2.1 The semi-finished sealing part made by the forming equipment is automatically transferred to the turning equipment 5 through the transfer equipment. The transfer equipment has a conveying frame, a conveying unit rotatably arranged on the conveying frame, a driving motor for driving the conveying unit to rotate, a first robot and a second robot matched with the input end and the output end of the conveying unit respectively. The conveying unit can be an elevator, a ring belt, a ring chain or a plurality of roller bodies. The first robot is used to transfer the semi-finished sealing part made by the forming equipment to the conveying unit, and the second robot is used to transfer the semi-finished sealing part of the conveying unit to the turning equipment.

[0028] The pouring equipment, the injection equipment, the vulcanization equipment, the pressing and sintering equipment, the transfer equipment and the turning equipment are coplanarly arranged, i.e., the above-mentioned multiple devices are located on the same floor in the factory building. The pouring equipment, the injection equipment, the vulcanization equipment and the pressing and sintering equipment are arranged around the input end of the transfer equipment.

[0029] According to actual needs, the pouring equipment, the injection equipment, the vulcanization equipment and the pressing and sintering equipment can also be arranged in parallel in the up-down direction, i.e., the above-mentioned multiple devices are arranged on multiple floors in the factory building respectively. The conveying unit is an elevator, and the turning equipment is arranged on the first floor in the factory building.

[0030] The structure of the first robot and the structure of the second robot are same, the robot comprises a movable mechanical arm, a mechanical gripper arranged on the end of the mechanical arm, the mechanical gripper comprises a third driving element, a fourth driving element, a first gripper arranged on the output end of the third driving element and a second gripper arranged on the output end of the fourth driving element; the third driving element drives the first gripper to rotate to approach or away from the second gripper, and the fourth driving element drives the second gripper to rotate to approach or away from the first gripper; the mechanical gripper further comprises a mounting seat, and the third driving element and the fourth driving element are fixedly arranged on the mounting seat respectively; the output end of the third driving element is connected with the first gripper through a first rotating shaft, and the output end of the fourth driving element is connected with the second gripper through a second rotating shaft; the first rotating shaft and the second rotating shaft are arranged in parallel and are rotatably arranged on the mounting seat respectively; the opposite side of the first gripper and the second gripper is provided with a clamping surface for clamping a workpiece, and the clamping surface is provided with an anti-skid structure. The clamping surface is arc-shaped, and the clamping surface is matched with the side wall of the product to be clamped.

[0031] The mixing device of the S1 comprises a bearing frame, a mixing component arranged on the bearing frame and a stirring barrel, the mixing component comprises a first stirring driving element, a second stirring driving element, a first stirring element connected with the output end of the first stirring driving element and a second stirring element connected with the second stirring driving element, and the first stirring element and the second stirring element both protrude into the stirring barrel to mix the main raw material, the auxiliary filler and the additive in the stirring barrel; the first stirring element comprises a first stirring shaft, and a stirring plate body is arranged at one end of the first stirring shaft away from the output end of the first stirring driving element; the stirring plate body comprises a first plate surface, a plurality of groups of first protrusions and a plurality of groups of second protrusions arranged on the side edge of the first plate body, and the plurality of groups of first protrusions and the plurality of groups of second protrusions are arranged alternately; the protruding direction of the first protrusion is opposite to the protruding direction of the second protrusion.

[0032] The second stirring element comprises a second stirring shaft, and a stirring element is arranged at one end of the second stirring shaft away from the output end of the second stirring driving element; the stirring element comprises a stirring sleeve for being connected with the second stirring shaft and a plurality of groups of stirring arms arranged on the outer side of the stirring sleeve; the stirring arm comprises a first stirring sheet and a second stirring sheet perpendicular to the first stirring sheet; the bottom of the first stirring sheet and the bottom of the second stirring sheet are both provided with a scraper; the scraper of the first stirring sheet is in abutment with the bottom of the stirring barrel, and the scraper of the second stirring sheet is in abutment with the side wall of the stirring barrel.

[0033] The mixing device realizes efficient mixing through the cooperation of the first stirring piece and the second stirring piece designed uniquely. The first protrusions and the second protrusions on the first stirring piece are staggered and protrude in opposite directions, which can generate multi-directional material disturbance during stirring, and enhance the cross mixing effect between materials. The stirring arm with a scraper in the second stirring piece can make the scraper of the first stirring piece adhere to the bottom of the stirring barrel, and the scraper of the second stirring piece adhere to the side wall of the stirring barrel, so as to effectively scrape off the adhered materials on the barrel wall and the barrel bottom, avoid the accumulation of residual materials, and assist in pushing the material circulation. In cooperation with the first stirring piece, a full-range and dead-angle-free stirring path is formed, so as to ensure that the main raw materials, auxiliary fillers and additives are fully and uniformly mixed in the stirring barrel, and the mixing efficiency and mixing quality are significantly improved.

[0034] Preferably, the raw material of the semi-finished sealing part made by the pouring device is polyol (polyester polyol or polyether polyol) and is dehydrated, isocyanate (such as TDI or MDI) is selected and heated to reduce the viscosity, and the catalyst, foaming agent and other additives are accurately weighed and added to the polyol or isocyanate for fully mixing. The polyol, isocyanate and additives are sequentially and proportionally added to the mixing device, fully mixed at 40-80℃ and a specified stirring speed, and then poured into the mold placed on the tray through the pouring device. The poured mold is placed in a 60-120℃ curing oven or room, and the curing time is controlled for several hours to several dozen hours according to the material formula and product requirements to ensure sufficient curing. After the mold is cooled and demolded, the semi-finished sealing part is placed in the turning equipment for turning processing.

[0035] Preferably, the raw material of the semi-finished sealing part made by the injection device is composed of isocyanate, polyol and catalyst, foaming agent and other additives, and the quality proportion is ensured by accurate weighing and mixing. The injection pressure, speed, holding pressure, time, barrel temperature (50-90℃), mold temperature (about 30-60℃) and other parameters are adjusted according to the material properties and product requirements. The raw material is added to the barrel of the injection part, the screw is conveyed to the nozzle, and the cavity is injected according to the set pressure and speed, and the holding pressure is compensated for shrinkage. The mold cooling system is used for cooling and curing, and the time is determined according to the product: the product is ejected after being cooled to a sufficient hardness and strength.

[0036] Preferably, the raw material of the semi-finished sealing part made by the vulcanization device is rubber mixed with raw rubber and compounding agents (vulcanizing agent, accelerator, etc.) according to the formula proportion, and the mixing parameters are controlled. The rubber is placed in the mold, the mold is closed, and the rubber is vulcanized in the vulcanization device, with the temperature (140-180℃), pressure (5-20MPa) and time (several minutes to several dozen minutes) being controlled. After vulcanization is completed and cooling, the mold is demolded.

[0037] Preferably, the raw materials of the semi-finished sealing part made by the pressing and sintering equipment are PTFE powder, filler and lubricant, which are put into a mixing device according to the component ratio for mixing; the mixed powder is put into a powder screening device for size separation, and the unqualified powder particles are returned for reprocessing; the qualified powder is put into a pre-made mold for molding by a hydraulic device or is extruded into a specific mold by a screw extruder; the molded or extruded blank is placed into a sintering furnace for sintering treatment; the sintered blank is placed into a cooling pool after being sleeved on a deformation prevention mold for cooling, and the cooled blank is slowly cooled to room temperature in a ventilated environment; the cooled blank is placed on a lathe for turning according to preset turning parameters.

[0038] Before the raw materials are mixed, the PTFE powder is also subjected to drying treatment, and is placed into a vacuum drying box for drying at a temperature of 100-120°C for 2-4h. The PTFE powder content is 70-85%, the filler is 10-20%, and the lubricant is 5-10%. The filler is composed of 5-10% glass fiber, 3-6% carbon fiber and 2-4% bronze powder.

[0039] In the powder screening step, the powder screening needs to be carried out in a constant temperature and humidity environment, and the qualified powder after screening is sealed and stored in a moisture-proof bag to prevent secondary moisture absorption or pollution. In the sintering step, sintering includes three stages of heating, holding and cooling. The heating is to heat the blank from room temperature to the sintering temperature, the holding is to keep the blank at the sintering temperature for a period of time to make the molecular motion intensified and the particle interface disappeared to become a dense continuous whole, and the cooling is to cool the sintered blank from the holding temperature to room temperature to make the resin change from amorphous molten state to crystalline phase. The sintering temperature is 370-385°C.

[0040] The method of making a semi-finished sealing part by pouring equipment has fine raw material treatment and strictly controlled mixing and pouring conditions, which can ensure that the product is fully cured and provide high-quality blanks for subsequent turning processing. The injection molding equipment method can obtain semi-finished products with good size accuracy and surface quality through accurate raw material proportioning and injection molding parameter adjustment. The vulcanization equipment method can improve the strength, wear resistance and other properties of rubber sealing parts based on the vulcanization principle and control of vulcanization process parameters. The pressing and sintering equipment method has strict control of each link from drying, mixing, screening to sintering and cooling, such as constant temperature and humidity screening and specific sintering stage control, to ensure the quality of the blank and provide suitable blanks for turning. Moreover, the component ratio of the raw materials is reasonable, which can comprehensively improve the performance of the sealing part. These four methods have their own advantages and lay a good foundation for producing high-quality sealing parts.

[0041] The beneficial effects of the present application are: in the raw material pretreatment stage, the main raw materials, auxiliary fillers and additives are mixed in proportion to provide suitable preparation raw materials for subsequent processes. Different forming equipment operates according to its own principle, such as pouring equipment uses electrically driven pouring head to pour according to the preset amount, injection equipment drives injection mold to inject raw materials and eject, vulcanization equipment drives heating flat plate vulcanization through hydraulic pressure, pressing and sintering equipment is pressed by hydraulic cylinder and sintered by sintering furnace, etc. These principles ensure the diversification of semi-finished sealing parts. Its beneficial effects are that the manufacturing methods corresponding to different forming equipment have their own advantages. The pouring equipment manufacturing method can provide fully solidified high-quality blanks for turning due to fine raw material processing and strict mixing and pouring conditions. The injection equipment manufacturing method makes the semi-finished product size precision and surface quality good by means of accurate raw material proportioning and parameter adjustment. The vulcanization equipment manufacturing method improves the performance of rubber sealing parts based on the control parameters of vulcanization principle. The pressing and sintering equipment manufacturing method strictly controls the raw material processing, each link is meticulous, ensures the blank quality and reasonable raw material proportion can comprehensively improve the performance of sealing parts, which lays a solid foundation for producing high-quality sealing parts. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 It is a structure schematic view of the pouring equipment of the present application;

[0043] Figure 2 It is a structure schematic view of the injection equipment of the present application;

[0044] Figure 3 It is a structure schematic view of the vulcanization equipment of the present application;

[0045] Figure 4 It is a structure schematic view of the pressing and sintering equipment of the present application;

[0046] Figure 5 It is a structure schematic view of the turning equipment of the present application;

[0047] Figure 6 It is a structure schematic view of the first embodiment of the fixed jig of the present application;

[0048] Figure 7 It is a structure schematic view of the second embodiment of the fixed jig of the present application;

[0049] Figure 8 It is a structure schematic view of the third embodiment of the fixed jig of the present application;

[0050] Figure 9 It is a structure schematic view of the first embodiment of the anti-deformation mold of the present application;

[0051] Figure 10 It is a structure schematic view of the second embodiment of the anti-deformation mold of the present application;

[0052] Figure 11 Process flow diagram of the present application;

[0053] Figure 12 Structural schematic diagram of the robot of the present application;

[0054] Figure 13 is Figure 12 Enlarged structural schematic diagram of part A in the middle;

[0055] Figure 14 Structural schematic diagram of the mixing device of the present application;

[0056] Figure 15 Structural schematic diagram of the first stirring driving member and the first stirring member of the present application;

[0057] Figure 16 Structural schematic diagram of the second stirring driving member and the second stirring member of the present application.

[0058] Reference signs include:

[0059] 1, pouring equipment; 2, injection equipment; 3, vulcanization equipment; 4, pressing sintering equipment; 5, turning equipment; 6, bearing main shaft; 7, first driving part; 8, second driving part; 9, processing tool; 11, frame body; 12, pouring part; 13, feeding part; 14, glue barrel; 15, tray; 16, feeding rail; 17, electric driving part; 18, pouring head; 19, base; 21, injection part; 22, injection cylinder; 23, moving guide rail; 24, injection mold; 25, ejection part; 26, rack; 27, heating flat plate assembly; 28, hydraulic driving system; 29, guide rod; 31, first heating flat plate; 32, second heating flat plate; 33, base; 34, pressing assembly; 35, sintering assembly; 36, control center; 37, support frame; 38, guide column; 39, mold positioning mechanism; 41, pressing power device; 42, hydraulic cylinder; 43, pressing mold head; 44, first carrier; 45, fixed mold; 46, base body; 47, stop structure; 48, positioning hole; 49, cylindrical part; 51, elastic part; 52, elastic rib; 53, clamping part; 54, pressing part; 55, pressing block; 56, elastic element; 57, adjusting screw; 58, anti-deformation mold; 59, outer mold sleeve; 61, inner mold core shaft; 62, elastic clamping ring; 63, prismatic protrusion; 100, bearing base plate; 101, water passing hole; 300, first core shaft; 400, second core shaft; 200, mechanical arm; 201, mechanical clamping jaw; 202, third driving part; 203, fourth driving part; 204, first grabbing; 205, second grabbing; 206, mounting seat; 207, first rotating shaft; 208, second rotating shaft; 209, anti-skid structure; 500, bearing frame; 501, mixing part; 502, stirring barrel; 503, first stirring driving part; 504, second stirring driving part; 505, first stirring part; 506, second stirring part; 507, first stirring shaft; 508, first plate surface; 509, first protrusion; 510, second protrusion; 511, second stirring shaft; 512, stirring sleeve; 513, first stirring piece; 514, second stirring piece; 515, scraper. DETAILED DESCRIPTION

[0060] For the convenience of the understanding of those skilled in the art, the present application is further illustrated below in conjunction with the embodiments and the accompanying drawings, and the content mentioned in the embodiments is not a limitation on the present application.

[0061] Please refer to Figures 1 to 16 the drawings, a multi-type sealing ring shared turning production and processing technology.

[0062] To achieve the above object, the multi-type sealing ring shared turning production and processing technology comprises the following steps:

[0063] S1. Raw material pretreatment: the main raw material, auxiliary filler and auxiliary agent are put into a mixing device according to the ingredient ratio to form a preparation raw material;

[0064] S2. Semi-finished product forming: the preparation raw material is added into a forming device for forming treatment to obtain a semi-finished product sealing piece; the forming device is one or more of a pouring device 1, an injection device 2, a vulcanization device 3 and a pressing sintering device 4;

[0065] S3. Turning processing: the semi-finished product sealing piece is installed and fixed on a bearing main shaft 6 of a turning device 5, a first driving member 7 of the turning device 5 drives the bearing main shaft 6 to drive the semi-finished product sealing piece to rotate, a second driving member 8 of the turning device 5 drives a machining tool 9 of the turning device 5 to perform turning processing on the rotating semi-finished product sealing piece, and the semi-finished product sealing piece is processed into a finished product sealing ring.

[0066] The pouring device 1 comprises a frame body 11, a pouring member 12 arranged on the frame body 11, a feeding member 13 and a glue barrel 14 connected with the pouring member 12, the glue barrel 14 is used for containing and heating the preparation raw material to melt; the feeding member 13 comprises a tray 15 used for placing a mold and a feeding track 16 arranged below the pouring member 12, the tray 15 used for placing the mold is moved to below the pouring member 12 through the feeding track 16; one end of a conveying pipeline of the glue barrel 14 is sealingly connected with a glue outlet of the glue barrel 14, and the other end is sealingly connected with a glue inlet of the pouring member 12, so as to convey the glue in the glue barrel 14 to the pouring member 12 to provide the glue required by the pouring member 12; the pouring member 12 comprises an electric driving member 17 and a pouring head 18, the electric driving member 17 drives the pouring head 18 to pour the mold placed below the pouring member 12 according to a preset pouring amount.

[0067] The frame body 11 supports the pouring member 12, the feeding member 13 and the glue barrel 14 to form a stable structure; the tray 15 of the feeding member 13 places the mold, and the feeding track 16 moves it to below the pouring member 12 to realize automatic feeding and improve production efficiency; the glue barrel 14 is connected with the pouring member 12 through the sealing conveying pipeline to ensure stable conveying of the glue; the electric driving member 17 of the pouring member 12 drives the pouring head 18 to accurately pour according to the preset pouring amount, ensures the accuracy and consistency of the pouring amount, avoids material waste and improves product quality.

[0068] The injection device 2 comprises a base 19, an injection component 21 arranged on the base 19, and an injection cylinder 22; the injection cylinder 22 comprises a moving guide rail 23, an injection mold 24 reciprocally moving on the moving guide rail 23, and an ejection component 25, the driving member drives the injection mold 24 to move to a side close to the injection component 21, the injection component 21 injects raw materials into the injection mold 24 through an injection port of the injection mold 24, the injection mold 24 moves to a side away from the injection component 21 through the driving member and abuts against the ejection component 25, and the ejection component 25 ejects the semi-finished sealant in the injection mold 24.

[0069] The injection device 2 supports the injection component 21 and the injection cylinder 22 through the base 19, realizes efficient cooperation of raw material injection and molding. Its beneficial effects are that the injection mold 24 reciprocally moves along the moving guide rail 23, is accurately positioned to the side of the injection component 21 to complete raw material injection, and is moved to the ejection component 25 to realize automatic ejection, the whole process is smooth and coherent, and the production efficiency is greatly improved. First, the injection mold 24 is arranged on the moving guide rail 23, the driving member is started to move the mold to the side of the injection component 21, the injection component 21 injects raw materials (such as mixed raw materials of isocyanate and polyol) into the mold cavity at a set pressure (such as the pressure under the temperature of 50-90℃ of the barrel), and the pressure is maintained for a certain time to compensate shrinkage. Then the driving member drives the mold to move to the ejection component 25 away from the injection component 21, the ejection component 25 abuts against the mold to stably eject the semi-finished sealant cooled and solidified. This automatic injection and ejection process reduces manual intervention and error, and is suitable for high-precision and large-batch seal ring production.

[0070] The vulcanization device 3 comprises a rack 26, a heating flat plate assembly 27 arranged on the rack 26, and a hydraulic driving system 28 connected with the heating flat plate assembly 27; the heating flat plate assembly 27 comprises a guide rod 29 arranged on the rack 26, a first heating flat plate 31 moving up and down along the guide rod 29, and a second heating flat plate 32 arranged below the first heating flat plate 31, an output end of the hydraulic driving system 28 is connected with the first heating flat plate 31, and the hydraulic driving system 28 drives the first heating flat plate 31 to reciprocally move on the guide rod 29 to approach or move away from the second heating flat plate 32 to vulcanize the semi-finished sealant placed on the second heating flat plate 32.

[0071] The heating flat plate assembly 27 and the hydraulic drive system 28 are supported by the rack 26 to form a stable vulcanization structure. The hydraulic drive system 28 drives the first heating flat plate 31 to reciprocate along the guide rod 29 to realize the approach or away from the second heating flat plate 32, so as to vulcanize the semi-finished sealing piece placed on the second heating flat plate 32. First, the semi-finished sealing piece is placed on the second heating flat plate 32, and the hydraulic drive system 28 is started. The hydraulic drive system 28 drives the first heating flat plate 31 to move downward along the guide rod 29, approaches the second heating flat plate 32, and makes the semi-finished sealing piece between the first heating flat plate 31 and the second heating flat plate 32. At the same time, the heating flat plate assembly 27 heats the semi-finished sealing piece. At a set temperature (such as 140-180℃), pressure (such as 5-20MPa), and time (several minutes to tens of minutes), the vulcanization process is completed. After vulcanization is completed, the hydraulic drive system 28 drives the first heating flat plate 31 to move upward along the guide rod 29, away from the second heating flat plate 32, so as to take out the vulcanized semi-finished sealing piece. The vulcanization equipment 3 has simple structure and convenient operation, can efficiently and accurately complete the vulcanization process of the sealing piece, and improves the production efficiency and product quality.

[0072] The pressing sintering equipment 4 comprises a base 33, a pressing assembly 34 arranged on the base 33, a sintering assembly 35, and a control center 36 electrically connected with the pressing assembly 34 and the sintering assembly 35 respectively. The pressing assembly 34 comprises a support frame 37 arranged on the base 33, guide columns 38 arranged on both sides of the support frame 37, a mold positioning mechanism 39 arranged at the bottom of the support frame 37, and a pressing power device 41 reciprocating on the guide columns 38. The pressing power device 41 comprises a hydraulic cylinder 42 and a pressing mold head 43 connected with the output end of the hydraulic cylinder. The hydraulic cylinder 42 drives the pressing mold head 43 to reciprocate on the guide columns 38 to approach or away from the mold positioning mechanism 39, so as to press the raw material into a semi-finished sealing piece. The semi-finished sealing piece after pressing is sent to the sintering assembly 35 for sintering and forming.

[0073] First, the mixed PTFE powder, filler and lubricant (dry, powder screening) are loaded into the preform mold of the mold positioning mechanism 39, the control center 36 starts the hydraulic cylinder 42, the hydraulic rod pushes the pressing mold head 43 to move downward along the guide column 38, and the raw materials in the mold are pressed into a set pressure (such as 5-20 MPa) to form a compact; the compact after pressing is sent to the sintering assembly 35 by the mechanical arm 200, and the control center 36 is heated to 370-385℃ according to the preset program and kept warm, so that the molecular interface is fused, and then gradually cooled to room temperature to form a crystalline phase compact; the compact is prevented from deforming during the cooling process by the anti-deformation mold 58 (the outer mold sleeve 59, the inner mold core shaft 61 and the elastic clamping ring 62), and finally a high-precision semi-finished sealing part that can be turned is obtained. The equipment realizes the efficient production of PTFE-based sealing parts through the automatic linkage of pressing and sintering, and the finished product has excellent properties such as low friction and high and low temperature resistance.

[0074] The first carrier 44 is detachably installed on the bearing spindle 6, and the first driving member 7 drives the first carrier 44 to rotate. The first carrier 44 is provided with a fixing jig 45, and the semi-finished sealing part is fixed on the first carrier 44 through the fixing jig 45 to cooperate with the machining tool 9 for turning.

[0075] The fixing jig 45 includes a base body 46, a stop structure 47 arranged on the base body 46, and a plurality of positioning holes 48. The end face of the semi-finished sealing part abuts against the base body 46, and the stop structure 47 is used to stop the outer side face of the semi-finished sealing part. A plurality of fasteners outside are used to lock and fix the semi-finished sealing part on the base body 46 through the plurality of positioning holes 48.

[0076] The fixing jig 45 includes a cylindrical portion 49 and an elastic portion 51 arranged outside the cylindrical portion 49. The elastic portion 51 includes a plurality of elastic ribs 52, which are distributed circumferentially outside the cylindrical portion 49. The circumferential included angle between adjacent two groups of elastic ribs 52 is 15°-60°. The semi-finished sealing part is sleeved on the cylindrical portion 49 and abuts against the elastic ribs 52.

[0077] The fixing jig 45 includes a clamping portion 53 and a pressing component 54 arranged in the clamping portion 53. The pressing component 54 includes a pressing block 55, an elastic element 56 and an adjusting screw 57. One end of the elastic element 56 is fixedly connected with the inner wall of the clamping portion 53, and the other end is connected with the pressing block 55 to provide an initial pressing force for the pressing block 55. The adjusting screw 57 penetrates through the side wall of the clamping portion 53 and is threadedly connected with the pressing block 55. By rotating the adjusting screw 57, the semi-finished sealing part contained in the clamping portion 53 is clamped and fixed.

[0078] The base body 46 stop structure 47 tool, through the end face of the base body 46 seal, stop structure 47 limit the outside, cooperate with the fastener through the positioning hole 48 locking, suitable for flat or regular shape seal, high fixing accuracy, can withstand large cutting force; cylindrical elastic rib 52 tool, the elastic rib 52 (circumferential angle 15°-60°) outside the cylindrical part 49 through the elastic deformation clamping set on the cylindrical seal, convenient clamping, suitable for annular or cylindrical seal, can adapt to different inner diameter size; clamping and pressing part 54 tool, the elastic element 56 provides initial pressing force, the rotating adjusting screw 57 can push the pressing block 55 clamping seal, flexible adjustment, suitable for special-shaped or high-precision seal, can accurately control the clamping force through the screw, avoid deformation.

[0079] According to the type of the seal, the corresponding tool is installed on the first carrier 44. For example, the regular shape seal is used with the base body 46 tool, and the end face thereof is abutted against the base body 46, the stop structure 47 limits the outside, and the fastener is locked through the positioning hole 48; the annular seal is sleeved on the cylindrical part 49, and the elastic rib 52 is automatically clamped; the special-shaped seal is placed in the clamping part 53, and the rotating adjusting screw 57 is clamped and fixed through the pressing block 55 and the elastic element 56. Then the first driving part 7 drives the carrier to rotate, and the machining tool 9 performs turning on the seal to realize high-precision forming. The design combines the detachable carrier and diversified tools to meet the fixing requirements of multiple types of seals, and improves the flexibility and reliability of turning.

[0080] The S2 further includes S2.1

[0081] S2.1: After the semi-finished seal made by the press sintering device 4 is placed into the anti-deformation mold 58, it is placed into the cooling pool for cooling, and the blank cooled by cold water is cooled and dried to room temperature; the anti-deformation mold 58 includes a bearing base plate 100 and a plurality of sleeve mandrels detachably connected with the bearing base plate 100, the bearing base plate 100 is provided with a plurality of water passing holes 101 penetrating through the bearing base plate 100, the plurality of sleeve mandrels include a plurality of first mandrels 300 and a plurality of second mandrels 400, the outer diameters of the first mandrels 300 and the second mandrels 400 are different, and the semi-finished seal is used to be sleeved on the outside of the first mandrel 300 or the second mandrel 400.

[0082] Further, the anti-deformation mold 58 includes an outer mold sleeve 59, an inner mold mandrel 61 sleeved on the outer mold sleeve 59, and an elastic clamping ring 62 sleeved on the outside of the outer mold sleeve 59, and the outer mold sleeve 59 and the inner mold mandrel 61 jointly clamp the blank to be cooled; the inner wall of the outer mold sleeve 59 is provided with a plurality of prismatic protrusions 63, the surface of the prismatic protrusions 63 is plated with hard chromium or sprayed with a wear-resistant coating to prevent powder adhesion, and the prismatic protrusions 63 leave a heat dissipation channel with the contact surface of the blank to be cooled.

[0083] The outer sleeve 59 and the inner mold core 61 form a bidirectional clamping structure, cooperating with the circumferential restraining force of the outer elastic clamping ring 62, to limit the deformation of the blank during cooling and shrinkage by means of "rigid support + elastic wrapping"; the prismatic protrusions 63 are designed (surface plated with hard chromium or wear-resistant coating) to reduce the contact area with the blank, both to reduce the risk of powder adhesion and to accelerate heat conduction through the heat dissipation channels between the protrusions, making the cooling of the blank more uniform; the segmented process of cold water cooling and ventilation slow cooling first rapidly reduces the surface temperature of the blank, and then releases internal stress through slow room temperature cooling, avoiding cracking or warping due to excessive temperature difference. The high-temperature blank after sintering is quickly sleeved into the anti-deformation mold 58: the inner mold core 61 is inserted into the inner hole of the blank, the outer sleeve 59 wraps the outer periphery, and the outer side is tightly clamped with the elastic clamping ring 62 (such as a spring steel ring), so that the prismatic protrusions 63 are in contact with the surface of the blank and maintain a small gap (heat dissipation channel). Subsequently, the whole is placed in a cooling pool, and is rapidly cooled for 10-15 minutes by circulating cold water (water temperature 20-30°C), and then taken out after the surface temperature of the blank is reduced to 60-80°C. Remove the elastic clamping ring 62, and place the blank together with the outer sleeve 59 and the inner mold core 61 in a ventilated place (wind speed 0.5-1 m / s) for slow cooling to room temperature (about 2-4 hours). During this process, the wear-resistant coating of the prismatic protrusions 63 prevents the blank powder from adhering to the mold, the heat dissipation channel ensures the cooling efficiency, and the three-layer mold structure controls the cooling deformation of the PTFE blank within 0.5% through the dual mechanisms of mechanical constraint and temperature control, providing high-precision blanks for subsequent turning.

[0084] The multi-type sealing ring shared turning production and processing technology further includes the following steps:

[0085] S2.1 The semi-finished sealing piece made by the forming equipment is automatically transferred to the turning equipment 55 through the transfer equipment. The transfer equipment has a conveying frame body 11, a conveying unit rotatably arranged on the conveying frame body 11, a driving motor for driving the conveying unit to rotate, a first robot and a second robot matched with the input end and the output end of the conveying unit. The conveying unit can be an elevator, a ring belt, a ring chain or a plurality of roller bodies. The first robot is used to transfer the semi-finished sealing piece made by the forming equipment to the conveying unit, and the second robot is used to transfer the semi-finished sealing piece of the conveying unit to the turning equipment 5.

[0086] The pouring equipment 1, the injection equipment 2, the vulcanization equipment 3, the pressing and sintering equipment 4, the transfer equipment and the turning equipment 5 are coplanarly arranged, i.e. the above-mentioned multiple equipment are located on the same floor of the factory building. The pouring equipment 1, the injection equipment 2, the vulcanization equipment 3 and the pressing and sintering equipment 4 are arranged around the input end of the transfer equipment.

[0087] According to actual needs, the pouring device 1, the injection device 2, the vulcanization device 3, and the pressing sintering device 4 can also be arranged in parallel in the up-down direction, i.e., the above devices are arranged on multiple floors in the factory building, and the conveying unit is a lifting elevator, and the turning device 5 is arranged on the first floor of the factory building.

[0088] The first robot and the second robot have the same structure, and each robot comprises a movable mechanical arm 200, a mechanical gripper 201 arranged at the end of the mechanical arm 200, the mechanical gripper 201 comprising a third driving member 202, a fourth driving member 203, a first gripper 204 arranged at the output end of the third driving member 202, and a second gripper 205 arranged at the output end of the fourth driving member 203; the third driving member 202 drives the first gripper 204 to rotate to approach or move away from the second gripper 205, and the fourth driving member 203 drives the second gripper 205 to rotate to approach or move away from the first gripper 204; the mechanical gripper 201 further comprises a mounting seat 206, and the third driving member 202 and the fourth driving member 203 are fixedly arranged on the mounting seat 206; the output end of the third driving member 202 is connected with the first gripper 204 through a first rotating shaft 207, and the output end of the fourth driving member 203 is connected with the second gripper 205 through a second rotating shaft 208; the first rotating shaft 207 and the second rotating shaft 208 are arranged in parallel and are rotatably arranged on the mounting seat 206; the first gripper 204 and the second gripper 205 are provided with a clamping surface for clamping a workpiece on the opposite side, and the clamping surface is provided with an anti-skid structure 209. The clamping surface is arc-shaped and is matched with the side wall of the product to be clamped.

[0089] The mixing device of the S1 comprises a bearing frame 500, a mixing component 501 arranged on the bearing frame 500, and a stirring barrel 502, the mixing component 501 comprises a first stirring driving member 503, a second stirring driving member 504, a first stirring member 505 connected with the output end of the first stirring driving member 503, and a second stirring member 506 connected with the second stirring driving member 504, and the first stirring member 505 and the second stirring member 506 both protrude into the stirring barrel 502 to mix the main raw material, the auxiliary filler, and the additive in the stirring barrel 502; the first stirring member 505 comprises a first stirring shaft 507, and a stirring plate body is arranged at the end of the first stirring shaft 507 away from the output end of the first stirring driving member 503, the stirring plate body comprises a first plate surface 508, a plurality of groups of first protrusions 509 and a plurality of groups of second protrusions 510 arranged on the side edge of the first plate body, the plurality of groups of first protrusions 509 and the plurality of groups of second protrusions 510 are arranged alternately, and the protruding directions of the first protrusions 509 and the second protrusions 510 are opposite.

[0090] The second stirring member 506 comprises a second stirring shaft 511, which is provided with a stirring element at one end away from the output end of the second stirring driver 504, the stirring element comprises a stirring sleeve 512 for connecting with the second stirring shaft 511, a plurality of stirring arms provided outside the stirring sleeve 512, the stirring arms comprise a first stirring blade 513 and a second stirring blade 514 perpendicular to the first stirring blade 513, the bottom of each of the first stirring blade 513 and the second stirring blade 514 is provided with a scraper 515, the scraper 515 of the first stirring blade 513 abuts against the bottom of the stirring barrel 502, and the scraper 515 of the second stirring blade 514 abuts against the side wall of the stirring barrel 502.

[0091] The mixing device realizes efficient mixing through the cooperation of the first stirring member 505 and the second stirring member 506 designed in a unique manner. The first protrusions 509 and the second protrusions 510 staggered and protruding in opposite directions on the first stirring member 505 can generate multi-directional material disturbance during stirring, thereby enhancing the cross-mixing effect between materials. The stirring arms with the scrapers 515 in the second stirring member 506 enable the scraper 515 of the first stirring blade 513 to adhere to the bottom of the stirring barrel 502 and the scraper 515 of the second stirring blade 514 to adhere to the side wall of the stirring barrel 502, which can effectively remove the adhered materials on the barrel wall and the barrel bottom, avoid the accumulation of residual materials, and assist in pushing the materials to circulate. In combination with the first stirring member 505, the second stirring member 506 forms a full-range and dead-angle-free stirring path, thereby ensuring that the main raw materials, auxiliary fillers, and additives are fully and uniformly mixed in the stirring barrel 502, and significantly improving the mixing efficiency and mixing quality.

[0092] Preferably, the raw materials of the semi-finished sealing member made by the pouring device 1 are dehydrated polyols (polyester polyol or polyether polyol), and isocyanate (such as TDI or MDI) is selected and heated to reduce the viscosity. The catalyst, blowing agent and other additives are accurately weighed according to the formula and added to the polyol or isocyanate for thorough mixing. The polyol, isocyanate and additives are sequentially and proportionally added to the mixing device, and are thoroughly mixed at a stirring speed of 40-80°C. Then, the mixed materials are poured into the mold placed on the tray 15 through the pouring device 1, and the poured mold is placed in a 60-120°C curing oven or room for several to tens of hours according to the material formula and product requirements to ensure sufficient curing. After the mold is cooled and demolded, the semi-finished sealing member is placed in the turning device 5 for turning processing.

[0093] Preferably, the raw material of the semi-finished sealing part made by the injection equipment 2 is composed of isocyanate, polyol, catalyst, blowing agent and other auxiliaries, and accurate weighing and mixing ensure the quality proportion. Adjust the injection pressure, speed, holding pressure, time, barrel temperature (50-90℃), mold temperature (about 30-60℃) and other parameters according to the material properties and product requirements. Put the raw material into the barrel of the injection part 21, and the screw is transported to the nozzle. According to the set pressure and speed, the material is injected into the cavity, and the holding pressure compensates for shrinkage. Cool and solidify through the mold cooling system. The time is determined according to the product: the product is ejected after cooling to a sufficient hardness and strength.

[0094] Preferably, the raw material of the semi-finished sealing part made by the vulcanization equipment 3 is mixed with raw rubber and compounding agents (vulcanizing agent, accelerator, etc.) according to the formula proportion, and the mixing parameters are controlled. Put the rubber into the mold, vulcanize in the vulcanization equipment 3 after closing the mold, control the temperature (140-180℃), pressure (5-20MPa) and time (a few minutes to a few tens of minutes), and demold after cooling.

[0095] Preferably, the raw material of the semi-finished sealing part made by the pressing and sintering equipment 4 is PTFE powder, filler and lubricant, which are put into the mixing equipment according to the component proportion for mixing; the mixed powder is put into the powder screening equipment for particle size separation, and the unqualified powder particles are returned for reprocessing; the qualified powder is loaded into the pre-made mold for hydraulic equipment molding or extruded into a specific mold opening through a screw extruder; the molded or extruded blank is placed into a sintering furnace for sintering treatment; the sintered blank is placed into a cooling pool after being sleeved on a deformation prevention mold 58, and then slowly cooled to room temperature in a ventilated environment; the cooled blank is placed on a lathe and turned according to the preset turning parameters;

[0096] Before mixing the raw material, the PTFE powder is also subjected to drying treatment. The PTFE powder is placed in a vacuum drying box for drying at a temperature of 100-120℃ for 2-4h. The PTFE powder content is 70-85%, the filler is 10-20%, and the lubricant is 5-10%. The filler is composed of the following components: 5-10% glass fiber, 3-6% carbon fiber, and 2-4% bronze powder.

[0097] In the screening step, screening needs to be carried out in a constant temperature and humidity environment, and the qualified powder after screening is sealed and stored in a moisture-proof bag to prevent secondary moisture absorption or pollution. In the sintering step, sintering includes three stages of heating, holding and cooling. The heating is to heat the blank from room temperature to the sintering temperature, the holding is to keep the blank reaching the sintering temperature for a period of time to make the molecular movement intensified and the particle interface disappear to become a dense continuous whole, and the cooling is to cool the sintered blank from the holding temperature to room temperature to make the resin change from amorphous molten state to crystalline phase. The sintering temperature is 370-385 DEG C.

[0098] The method for manufacturing the semi-finished sealing member by using the pouring equipment 1 can ensure that the product is fully solidified and provides high-quality blank for subsequent turning processing, because the raw material treatment is fine and the mixing and pouring conditions are strictly controlled. The manufacturing method of the injection equipment 2 can obtain semi-finished products with good size precision and surface quality by accurately adjusting the raw material ratio and injection parameters. The manufacturing method of the vulcanization equipment 3 can improve the strength and wear resistance of the rubber sealing member based on the vulcanization principle and by controlling the vulcanization process parameters. The manufacturing method of the pressing and sintering equipment 4 can strictly control each link from drying, mixing and screening to sintering and cooling, such as constant temperature and humidity screening and specific sintering stage control, to ensure the blank quality and provide suitable blank for turning. In addition, the raw material composition ratio is reasonable, which can comprehensively improve the performance of the sealing member. The four methods have their own advantages and lay a good foundation for producing high-quality sealing members.

[0099] The remaining part of the embodiment is the same as that of example one, and the features not explained in the embodiment are explained by using the explanation of example one, which will not be described here.

[0100] The above is only the preferred embodiment of the present application, and for those skilled in the art, the specific implementation and application range can be changed according to the idea of the present application, and the content of the specification should not be understood as the limitation of the present application.

Claims

1. A common turning production process for multiple types of sealing rings, characterized in that: The following steps are involved: S1. Raw material pretreatment: The main raw materials, auxiliary fillers and additives are put into a mixing device according to the proportion of the ingredients to form a mixed raw material; S2 semi-finished product molding; the raw materials are added to the molding equipment for molding to obtain a semi-finished seal; the molding equipment is a casting equipment (1), an injection equipment (2), a vulcanizing equipment (3), a pressing and sintering equipment (4) in one or more; S3. Turning: The semi-finished seal is mounted and fixed on the bearing spindle (6) of the turning device (5), the first driving member (7) of the turning device (5) drives the bearing spindle (6) to rotate the semi-finished seal, and the second driving member (8) of the turning device (5) drives the machining tool (9) of the turning device (5) to perform turning on the rotating semi-finished seal, and the semi-finished seal is processed into a finished sealing ring.

2. A common turning production process for multiple types of sealing rings according to claim 1, characterized in that: The pouring equipment (1) comprises a frame (11), a pouring part (12) arranged on the frame (11), a feeding part (13) and a glue barrel (14) connected to the pouring part (12), wherein the glue barrel (14) is used to accommodate and heat the prepared raw materials; the feeding part (13) comprises a tray (15) for placing semi-finished sealing parts, and a feeding track (16) arranged below the pouring part (12); the tray (15) is used to place molds, and the tray (15) for placing the molds is moved via the feeding track (16) The rubber barrel (14) is moved to the bottom of the casting component (12); one end of the conveying pipe of the rubber barrel (14) is sealed with the rubber outlet of the rubber barrel (14), and the other end is sealed with the rubber inlet of the casting component (12); the rubber in the rubber barrel (14) is conveyed to the casting component (12), providing the casting component (12) with the rubber required for casting; the casting component (12) includes an electric drive component (17) and a casting head (18); the electric drive component (17) drives the casting head (18) to cast the mold placed under the casting component (12) according to a preset casting amount.

3. The common turning production process for multiple types of sealing rings according to claim 1, characterized in that: The injection device (2) comprises a base (19), an injection component (21) arranged on the base (19), and an injection cylinder (22); the injection cylinder (22) comprises a movable guide rail (23), an injection mold (24) that reciprocates on the movable guide rail (23), and an ejection component (25); the driving component drives the injection mold (24) to move to a side close to the injection component (21); the injection component (21) injects raw materials into the injection mold (24) through the injection port of the injection mold (24); the injection mold (24) moves to a side away from the injection component (21) via the driving component and contacts the ejection component (25); the ejection component (25) ejects the semi-finished sealing component in the injection mold (24).

4. The common turning production process for multiple types of sealing rings according to claim 1, characterized in that: The vulcanizing equipment (3) comprises a frame (26), a heating plate assembly (27) arranged on the frame (26), and a hydraulic drive system (28) connected to the heating plate assembly (27); the heating plate assembly (27) comprises a guide rod (29) arranged on the frame (26), a first heating plate (31) moving up and down along the guide rod (29), and a second heating plate (32) arranged below the first heating plate (31); the output end of the hydraulic drive system (28) is connected to the first heating plate (31); the hydraulic drive system (28) drives the first heating plate (31) to move back and forth on the guide rod (29) to approach or move away from the second heating plate (32) to vulcanize a semi-finished sealing component placed on the second heating plate (32).

5. The common turning production process for multiple types of sealing rings according to claim 1, characterized in that: The pressing and sintering equipment (4) includes a base (33), a pressing assembly (34) and a sintering assembly (35) arranged on the base (33), and a control center (36) electrically connected to the pressing assembly (34) and the sintering assembly (35) respectively; the pressing assembly (34) includes a support frame (37) arranged on the base (33), guide columns (38) arranged on both sides of the support frame (37), a mold positioning mechanism (39) arranged at the bottom of the support frame (37), and a pressing power device (41) that reciprocates on the guide columns (38), the pressing power device (41) includes a hydraulic cylinder (42) and a pressing die head (43) connected to the output end of the hydraulic rod; the hydraulic cylinder (42) drives the pressing die head (43) to reciprocate on the guide column (38) to move closer to or away from the die positioning mechanism (39) to press the raw material into a semi-finished sealing component, and the pressed semi-finished sealing component is sent to the sintering assembly (35) for sintering molding.

6. The common turning production process for multiple types of sealing rings according to claim 1, characterized in that: A first carrier (44) is detachably mounted on the bearing spindle (6); a first driving member (7) drives the first carrier (44) to rotate; the first carrier (44) is provided with a fixed jig (45); and a semi-finished sealing component is fixed on the first carrier (44) via the fixed jig (45) and is turned in cooperation with a machining tool (9).

7. The common turning production process for multiple types of sealing rings according to claim 6, characterized in that: The fixing jig (45) includes a base (46), a stopping structure (47) arranged on the base (46), and a plurality of positioning holes (48). The end face of the semi-finished sealing part contacts the base (46). The stopping structure (47) is used to stop the outer side of the semi-finished sealing part. A plurality of external fasteners lock and fix the semi-finished sealing part on the base (46) through the plurality of positioning holes (48).

8. The common turning production process for multiple types of sealing rings according to claim 6, characterized in that: The fixing jig (45) includes a cylindrical portion (49) and an elastic portion (51) arranged outside the cylindrical portion (49). The elastic portion (51) includes multiple groups of elastic ribs (52). The multiple groups of elastic ribs (52) are circumferentially distributed outside the cylindrical portion (49). The circumferential angle between two adjacent groups of elastic ribs (52) is 15°-60°. The semi-finished sealing member is sleeved on the cylindrical portion (49) and contacts the elastic ribs (52).

9. The common turning production process for multiple types of sealing rings according to claim 6, characterized in that: The fixing jig (45) includes a clamping portion (53) and a pressing component (54) arranged in the clamping portion (53); the pressing component (54) includes a pressing block (55), an elastic element (56) and an adjusting screw (57); one end of the elastic element (56) is fixedly connected to the inner wall of the clamping portion (53), and the other end is connected to the pressing block (55) to provide an initial pressing force for the pressing block (55); the adjusting screw (57) passes through the side wall of the clamping portion (53) and is threadedly connected to the pressing block (55); and the semi-finished sealing component contained in the clamping portion (53) is clamped and fixed by rotating the adjusting screw (57).

10. The common turning production process for multiple types of sealing rings according to claim 1, characterized in that: The S2 also includes S2.1 S2.1: The semi-finished sealing component formed by the pressing and sintering equipment (4) is placed into the anti-deformation mold (58) and placed in the cooling pool for cooling. The blank after cold water cooling is cooled and dried to room temperature; the anti-deformation mold (58) includes a carrier substrate (100), a plurality of sleeve core shafts detachably connected to the carrier substrate (100), the carrier substrate (100) is provided with a plurality of water holes (101) passing through the carrier substrate (100), the plurality of sleeve core shafts include a plurality of first core shafts (300) and a plurality of second core shafts (400), the outer diameter of the first core shaft (300) is different from the outer diameter of the second core shaft (400), and the semi-finished sealing component is used to be sleeved on the outside of the first core shaft (300) or the outside of the second core shaft (400).

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