Plastic hot runner mold processing and on-line measuring integrated equipment and processing method thereof

Abstract

This invention discloses an integrated equipment and method for processing and online measurement of plastic hot runner molds. The integrated equipment includes a machine bed base, a clamping slide mechanism, a column and beam mechanism, a turret and slider mechanism, a probe component, and auxiliary devices such as hydraulic, cooling, pneumatic, lubrication, and chip removal systems. A main clamping component is fixedly installed on the machine bed base, and a hydraulic center frame component is slidably installed. The column and beam mechanism is vertically installed above the machine bed base, and a grating ruler and a Z-axis roller linear guide are mounted on it. A measuring probe component is installed on the turret and slider mechanism, which can slide along the Z-axis guide rail across the hydraulic center frame to measure the left and right end faces of the hot runner mold. The measurement data is fed back to the CNC system via the grating ruler, and the machining allowance is automatically calculated. A tool setter is located on the right end of the column and beam of the equipment. This invention enables precision machining and online measurement, effectively solving the problem of inaccurate total cutting length of plastic hot runner molds, ensuring a cutting length accuracy to 0.02 mm.

Description

Technical Field

[0001] This invention relates to a machining equipment, belonging to the field of machining technology, specifically designing an integrated equipment and method for processing and measuring plastic hot runner molds. Background Technology

[0002] Plastic hot runner molds are crucial for the research and development and manufacturing of injection molding products, widely used in industries such as automotive, electronics, packaging, home appliances, medical, and food. When molding large curved surface products such as car bumpers and dashboards, the complex structure of plastic hot runner molds is a primary concern. Currently, sequential valve gate hot runners are mainly used, and hot runner nozzles of the same type require different length series. Their machining accuracy directly affects the product quality and appearance, with dimensional tolerances generally required to be within the range of 0.005-0.02mm. The total length error at both ends after machining must be controlled within 0.02mm, demanding high precision. Current production processes involve disassembling the hot runner mold after machining for measurement. If the accuracy is not within the tolerance range, the mold must be re-clamped for machining and measurement, repeating this process to control the total length accuracy. This repeated clamping results in poor repeatability, low processing efficiency, and a low product yield. Summary of the Invention

[0003] Purpose of the invention: In order to solve the problems of inaccurate total length and insufficient automation in the processing of hot runner molds, this invention provides an integrated device for efficient and precise processing and online measurement of plastic hot runner molds.

[0004] Technical solution: An integrated equipment for processing and online measurement of plastic hot runner molds, including a machine tool base, a clamping slide mechanism is provided on the machine tool base, and a spindle clamp, a left floating support frame, a hydraulic center frame and a right floating support frame are arranged through the clamping slide mechanism. The spindle clamp and the hydraulic center frame are used for fastening the workpiece, and the left floating support frame and the right floating support frame are lifting devices.

[0005] The machine tool base is also equipped with a column and crossbeam mechanism, which is located above the machine tool base. A Z-axis roller linear guide is installed through the column and crossbeam mechanism. A turret slider mechanism is slidably mounted on the Z-axis roller linear guide. Under the action of the Z-axis ball screw pair and the Z-axis servo motor, the servo hydraulic turret and measuring probe mounted on the turret slider mechanism can slide across the hydraulic center frame. A grating ruler is provided on the column and crossbeam mechanism, which is arranged parallel to the Z-axis roller linear guide. The measuring probe and the grating ruler measure the machining accuracy of the workpiece and feed the measurement data back to the CNC system of the equipment. A tool setter is provided on the opposite end of the servo hydraulic turret of the column and crossbeam mechanism for automatic monitoring of tool damage during the machining process.

[0006] The equipment is also equipped with a cooling device, which includes a centrifugal pump and a high-pressure oil pipe connected to it. The centrifugal pump sends the coolant in the coolant tank to the servo hydraulic turret through two high-pressure oil pipes to cool and lubricate the cutting tools and workpieces during processing, and sends it to the processing groove on the machine tool base to flush away iron filings inside the machine tool.

[0007] Furthermore, the clamping slide mechanism includes a main clamping assembly and a hydraulic center frame assembly;

[0008] The main clamping assembly includes a main clamping pad, a spindle clamping seat, and a left floating support frame. The main clamping pad is fixedly installed on the machine tool base, the spindle clamping seat is fixedly installed on the main clamping pad, and the left floating support frame is located on the right side of the spindle clamping seat.

[0009] The hydraulic center frame assembly includes a center frame slide, a center frame support plate, a hydraulic center frame, an adjusting positioning bracket, a push block, a positioning cylinder, and a right floating support frame. The center frame support plate is fixedly installed on the center frame slide, and an adjusting shim is provided between the center frame support plate and the center frame slide. The adjusting positioning bracket is fixedly installed on the center frame support plate, and an oblong groove is opened on the adjusting positioning bracket. The positioning cylinder drives the push block to push the left end of the hot runner mold located on the left floating support frame and the right floating support frame into the spindle clamp. The hydraulic center frame is fixedly installed on the left side of the center frame support plate.

[0010] The central frame slide can move along the Y-axis roller linear guide rail and includes a Y-axis transmission mechanism.

[0011] Furthermore, the Y-axis transmission mechanism includes a Y-axis servo motor, a Y-axis ball screw pair, and a Y-axis roller linear guide. The Y-axis servo motor drives the Y-axis ball screw pair, thereby causing the hydraulic center frame assembly connected to it to move along the Y-axis roller linear guide.

[0012] A pneumatic normally closed guide rail clamp is provided on the Y-axis roller linear guide rail. Under the control of the CNC system, the pneumatic normally closed guide rail clamp locks the center frame slide at any position on the Y-axis roller linear guide rail through a pneumatic mechanism.

[0013] The central support plate is equipped with a high-pressure universal spherical air nozzle. The high-pressure universal spherical air nozzle is used for cooling during the hot runner mold processing. The high-pressure universal spherical air nozzle is used to ensure the dryness and cleanliness of the right end face of the hot runner mold, and also for gas cooling during the processing operation.

[0014] Furthermore, the turret slider mechanism includes a left cross slide plate, an X-axis transmission mechanism, a left upper slide plate, a servo hydraulic turret, and a probe component; the left cross slide plate is slidably mounted on a Z-axis roller linear guide rail, driving the turret slider mechanism to slide along the Z-axis (an X-axis roller linear guide rail is also provided on the left cross slide plate); the X-axis transmission mechanism is mounted on the left cross slide plate and drives an X-axis ball screw pair through an X-axis servo motor, driving the turret slider mechanism to feed along the X-axis roller linear guide rail;

[0015] The servo hydraulic turret is fixed on the upper left slide plate, which is fixedly connected to the nut of the X-axis ball screw pair and can slide along the X-axis roller linear guide.

[0016] The servo hydraulic turret is equipped with a push rod, which is used for axial positioning of the left end face of the plastic hot runner mold.

[0017] Furthermore, the probe component includes a probe bracket, a cylinder fixing plate, a rotary cylinder, a measuring probe, a swing arm, and a probe protective cover. The probe component is fixedly installed on the upper left slide plate, and a probe bracket adjustment plate is provided in the middle.

[0018] Furthermore, the device is equipped with a main motor and a photoelectric encoder on the machine tool base. The main motor drives the spindle holder to rotate via a synchronous belt and drives the hot runner mold to rotate.

[0019] The equipment is equipped with a pneumatic lubrication control plate via a column and crossbeam, used to lubricate the ball screw pair and the roller linear guide transmission components. It also includes a pneumatic control mechanism and a hydraulic control mechanism. The pneumatic control mechanism provides air to the positioning cylinder, probe protective cover, left floating support frame, right floating support frame, normally closed pneumatic guide clamp, and high-pressure universal ball air nozzle, and realizes control. The hydraulic control mechanism is used to control the clamping and loosening of the hydraulic center frame, the clamping and loosening of the spindle holder, and the clamping and loosening of the servo hydraulic turret.

[0020] The hot runner mold processing method of the above-mentioned integrated equipment for processing and online measurement of plastic hot runner molds includes equipment assembly and initial position setting. The total length of the hot runner mold to be processed and the blank length are input into the CNC system. The system calculates and positions the Y-axis position of the center frame slide. The hot runner mold is placed on the left floating support frame and the right floating support frame to begin the processing operation. It also includes the following steps:

[0021] S1. Control the hydraulic center frame to continue moving a set distance along the Y direction, so that the hot runner mold is pushed into the spindle holder. Then, the positioning cylinder drives the push block to push the hot runner mold. The push rod on the servo hydraulic turret realizes the axial positioning of the hot runner mold. The spindle holder and the hydraulic center frame clamp the hot runner mold. The left floating support frame and the right floating support frame descend, and the positioning cylinder retracts to its original position.

[0022] S2. The measuring probe first measures a point on the left end of the hot runner mold. The turret slider mechanism carries the measuring probe along the Z-axis roller linear guide rail across the hydraulic center frame to measure the upper and lower points on the right end face of the hot runner mold. It determines whether the flatness of the right end of the hot runner mold is within 0.02mm. If the difference is greater than 0.02mm, the control equipment alarms and stops working; if the difference is less than 0.02mm, the equipment proceeds to the next cutting step.

[0023] S3. The turret slider mechanism returns to the left end of the hot runner mold along the Z-axis roller linear guide. The CNC system calculates the end face cutting width, the cutter cuts off the hot runner mold, leaving a 0.5mm semi-finishing allowance, and the external turning tool finishes the end face, leaving a 0.3mm finishing allowance.

[0024] S4. The measuring probe first measures a point on the left end of the hot runner mold. The turret slider mechanism carries the measuring probe along the Z-axis roller linear guide rail across the hydraulic center frame to measure two points on the right end face of the hot runner mold. The CNC system calculates the finishing allowance, and the equipment proceeds to the next cutting step.

[0025] S5. The turret slider mechanism returns to the left end of the hot runner mold along the Z-axis roller linear guide. The system automatically calculates the end face cutting width and the external turning tool finishes the end face to ensure that the total length dimension is within the tolerance range of 0.02mm and the surface roughness is ≤Ra1.6um.

[0026] S6. The measuring probe first measures a point on the left end of the hot runner mold. The turret slider mechanism carries the measuring probe along the Z-axis roller linear guide rail across the hydraulic center frame to measure two points on the right end face of the hot runner mold, one above and one below. The CNC system calculates the total length of the hot runner mold and determines whether the tolerance is within 0.02mm. If the difference is greater than 0.02mm, the equipment alarms; if the difference is less than 0.02mm, the equipment proceeds to the next cutting step.

[0027] S7. Machining the inner hole countersunk and threads on the left end of the hot runner mold, ensuring that the coaxiality between the inner hole and the outer circle is controlled within 0.02mm, and the perpendicularity between the bottom surface of the inner hole and the outer circle is controlled within 0.02mm; the surface roughness of the bottom surface of the inner hole countersunk is ≤Ra1.6μm;

[0028] S8. The spindle clamp and hydraulic center support loosen the hot runner mold, the left floating support and right floating support rise to support the hot runner mold, the hydraulic center support retracts to the set distance, and the hot runner mold is removed.

[0029] Beneficial Effects: The equipment described in this invention is suitable for processing hot runner molds for casting plastics, effectively solving the problem of inaccurate total cutting length in hot runner molds, enabling the equipment to guarantee a cutting length accuracy of 0.02mm. The spindle clamp is replaceable with a collet, allowing for a wide range of machining diameters. The hydraulic center rest can slide along the Y-axis for feeding, accommodating a large range of machining lengths. Through a probe component and a grating ruler, real-time position values ​​are directly fed back to the control system for online detection of the hot runner mold length, automatic calculation of the cutting depth, achieving online measurement and efficient precision machining, resulting in high processing efficiency and a high product qualification rate. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the device described in this invention. Figure 1 ;

[0031] Figure 2 This is a schematic diagram of the overall structure of the device described in this invention. Figure 2 ;

[0032] Figure 3 This is a rear view of the device described in this invention;

[0033] Figure 4 This is a sectional view of the machine tool base described in this invention;

[0034] Figure 5 This is a schematic diagram of the clamping slide mechanism in this invention;

[0035] Figure 6 This is a schematic diagram of the feed component of the clamp slide mechanism in this invention;

[0036] Figure 7 This is a schematic diagram of the guide rail clamping device of the clamping slide mechanism in this invention;

[0037] Figure 8 This is a schematic diagram of the Z-axis sliding mechanism in the column-beam mechanism of this invention;

[0038] Figure 9 This is a schematic diagram of the turret slider mechanism in this invention. Figure 1 ;

[0039] Figure 10 This is a schematic diagram of the turret slider mechanism in this invention. Figure 2 ;

[0040] Figure 11 This is a schematic diagram of the probe component in this invention;

[0041] Figure 12 This is a schematic diagram of the cooling hydraulic system in this invention;

[0042] Figure 13 This is a logic structure diagram of the numerical control system in the device described in this invention.

[0043] In the diagram: 1-Machine base, 2-Main motor, 3-Photoelectric encoder, 4-Synchronous belt, 5-Main clamping pad, 6-Spindle clamping seat, 7-Hot runner mold, 8-Left floating support frame, 9-Center rest slide, 10-Center rest support plate, 11-Hydraulic center rest, 12-Push block, 13-High-pressure universal ball air nozzle, 14-Adjusting positioning bracket, 15-Positioning cylinder, 16-Adjusting shim, 17-Right floating support frame, 18-Y-axis servo motor, 19-Y-axis ball screw pair, 20-Y-axis roller linear guide, 21-Pneumatic normally closed guide clamp, 22-Column beam, 23-Z 24-Z-axis servo motor, 25-Z-axis ball screw pair, 26-Z-axis roller linear guide, 27-grating ruler, 28-tool setter, 29-left cross slide plate, 30-X-axis servo motor, 31-X-axis ball screw pair, 32-X-axis roller linear guide, 33-upper left slide plate, 34-servo hydraulic turret, 35-push rod, 36-probe bracket adjustment plate, 37-probe bracket, 38-cylinder fixing plate, 39-rotary cylinder, 40-measuring probe, 41-swing arm, 42-probe protective cover, 43-coolant tank, 44-centrifugal pump, 45-high pressure oil pipe, 46-pneumatic lubrication control board. Detailed Implementation

[0044] To illustrate the technical solutions disclosed in this invention in detail, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] To address the insufficient precision of existing CNC machine tools in machining hot runner molds, and the inherent problem of requiring repeated positioning for each CNC machine operation, this invention provides an integrated equipment and method for machining and online measurement of plastic hot runner molds. The equipment includes a machine base, a clamping slide mechanism, a column and beam mechanism, a turret and slider mechanism, a probe component, and auxiliary devices for hydraulics, cooling, pneumatics, lubrication, and chip removal. The main clamping component is fixedly mounted on the machine base, and a hydraulic center frame component is slidably mounted thereon. The column and beam mechanism is vertically mounted above the machine base, and a grating ruler and a Z-axis roller linear guide are installed on it. A measuring probe component is mounted on the turret and slider mechanism, which slides along the Z-axis guide rail across the hydraulic center frame to measure the left and right end faces of the hot runner mold. The measurement data is fed back to the CNC system via the grating ruler, and the machining allowance is automatically calculated. A tool setter is located on the right end of the column and beam of the equipment. This invention enables precision machining and online measurement, effectively solving the problem of inaccurate total cutting length of plastic hot runner molds, ensuring a cutting length accuracy to 0.02 mm.

[0046] Please refer to Figures 1 to 12This invention relates to an integrated equipment for high-efficiency precision machining and online measurement of plastic hot runner molds, comprising a machine tool base 1, a clamping slide mechanism, a column beam mechanism, a turret slider mechanism, a probe component, and auxiliary devices such as hydraulic, cooling, pneumatic, lubrication, and chip removal systems. A spindle clamp 6 is fixedly mounted on the machine tool base 1, and a hydraulic center frame 11 is slidably mounted thereon. The column beam 22 is vertically mounted above the machine tool base 1, and a linear scale 26 and three Z-axis roller linear guides 25 are mounted on it. A measuring probe 39 is provided on the turret slider mechanism, and the measuring probe 39 can slide along the Z-axis guides across the hydraulic center frame 11 following the servo hydraulic turret 33. A tool setter 27 is located on the far right of the equipment and mounted on the column beam 22. The cooling hydraulic system is located behind the machine tool base 1. A pneumatic lubrication control board 45 is mounted on the rear side of the column beam 22.

[0047] Regarding the equipment provided by this invention, the basic structure of existing CNC machine tools will not be specifically described. Those skilled in the art should understand the improvements made by this invention in conjunction with the technical solutions described below.

[0048] Combination Figures 1 to 3 The present invention first provides a machine tool base 1, on which a clamping slide mechanism is provided, in the Y direction as shown in the figure, for clamping the hot runner mold. A servo hydraulic turret is set through a column crossbeam and is arranged with a sliding mechanism in the X direction, including a turret slider mechanism. Furthermore, in conjunction with the column crossbeam mechanism, a sliding mechanism in the Z direction is provided. A pneumatic lubrication device is provided at the rear end of the column crossbeam, including pneumatic control and lubrication control structures.

[0049] Combination Figure 3 and Figure 4 The machine tool base 1 is equipped with a main motor 2 and a photoelectric encoder 3. The main motor 2 drives the spindle holder 6 to rotate through the synchronous belt 4, which in turn drives the hot runner mold 7 to rotate.

[0050] Combination Figure 5 and Figure 6The clamping slide mechanism is fixedly installed on the machine tool base 1 and includes: a main clamping assembly, a hydraulic center frame assembly, and a Y-axis transmission mechanism. The main clamping assembly includes: a main clamping pad 5, a spindle clamping seat 6, and a left floating support frame 8. The main clamping pad 5 is fixedly installed on the machine tool base 1, the spindle clamping seat 6 is fixedly installed on the main clamping pad 5, and the left floating support frame 8 is located on the right side of the spindle clamping seat 6. The hydraulic center frame assembly includes a center frame slide 9, a center frame support plate 10, a hydraulic center frame 11, an adjusting positioning bracket 14, a push block 12, a positioning cylinder 15, and a right floating support frame 17. The center frame support plate 10 is fixedly installed on the center frame slide 9, and an adjusting shim 16 is provided between the center frame support plate 10 and the center frame slide 9 to ensure that the spindle clamping seat 6 and the hydraulic center frame 11 are at the same horizontal height after clamping the hot runner mold 7. The adjusting positioning bracket 14 is fixedly installed on the center frame support plate 10. The adjusting positioning bracket 14 has a waist-shaped groove. The positioning cylinder 15 drives the push block 12 to push the left end of the hot runner mold 7, located on the left floating support frame 8 and the right floating support frame 17, into the spindle clamp 6. The hydraulic center frame 11 is fixedly installed on the left side of the center frame support plate 10 and is used to clamp the other end of the hot runner mold 7. The right floating support frame 17 is located to the left of the hydraulic center frame 11.

[0051] The Y-axis transmission mechanism is fixedly installed on the clamp slide and includes: a Y-axis servo motor 18, a Y-axis ball screw pair 19, and a Y-axis roller linear guide 20. The Y-axis servo motor 18 drives the Y-axis ball screw pair 19, which in turn drives the hydraulic center frame 11 component to slide along the Y-axis roller linear guide 20.

[0052] According to an embodiment of the present invention, in combination Figure 7 A pneumatic normally closed guide rail clamp 21 is slidably installed on the Y-axis roller linear guide rail 20. The center frame slide 9 is fixedly installed on the pneumatic normally closed guide rail clamp 21. The guide rail is clamped directly by pneumatic pressure control, and the hydraulic center frame 11 is fixed and braked at any position.

[0053] In order to achieve mold cooling during the processing, a high-pressure universal ball-shaped air nozzle 13 is fixedly installed on the right side of the hydraulic center frame 11 and on the center frame support plate 10.

[0054] Furthermore, in combination Figure 8The column-beam mechanism is vertically mounted on the machine tool base 1 and includes a column-beam 22, a Z-axis roller linear guide 25, a Z-axis transmission mechanism, a linear encoder 26, and a tool setter 27. The Z-axis roller linear guide 25 is fixedly mounted on the column-beam 22. One ball bearing guide is mounted above the column-beam 22, and the other two are mounted in front of the column-beam 22. The Z-axis transmission mechanism is fixedly mounted on the front side of the column-beam 22 and includes a Z-axis servo motor 23, a Z-axis ball screw pair 24, and the Z-axis roller linear guide 25. The turret slider mechanism is slidably mounted on the Z-axis roller linear guide 25. The Z-axis servo motor 23 drives the Z-axis ball screw pair 24, causing the turret slider mechanism to slide along the Z-axis roller linear guide 25. The linear encoder 26 is fixedly mounted on the column-beam 22, parallel to the Z-axis roller linear guide 25 above the column-beam 22. The tool setting device 27 is fixedly installed on the rightmost side of the column beam 22.

[0055] Combination Figure 9 and Figure 10 The turret slider mechanism includes a left cross slide plate 28, an X-axis transmission mechanism, a left upper slide plate 32, a servo hydraulic turret 33, and a probe assembly. Specifically, the left cross slide plate 28 is slidably mounted on a Z-axis roller linear guide 25, and an X-axis roller linear guide 31 is fixedly mounted on the left cross slide plate 28. The X-axis transmission mechanism is fixedly mounted on the left cross slide plate 28 and includes an X-axis servo motor 29, an X-axis ball screw pair 30, and an X-axis roller linear guide 31. The left upper slide plate 32 is slidably mounted on the X-axis roller linear guide 31, and the servo hydraulic turret 33 is fixedly mounted on the left upper slide plate 32. The X-axis servo motor 29 drives the X-axis ball screw pair 30, causing the servo hydraulic turret 33 to slide along the X-axis roller linear guide 31.

[0056] A push rod 34 is installed on the servo hydraulic turret 33 station for axial positioning of the left end face when the hot runner mold 7 is loaded and clamped.

[0057] The aforementioned probe components include a probe holder 36, a rotary cylinder 38, a cylinder mounting plate 37, a measuring probe 39, a swing rod 40, and a probe protective cover 41. The probe components are fixedly mounted on the upper left slide plate 32, and a probe holder 36 adjustment plate 35 is provided in the middle to ensure that the measuring probe 39 and the center of the hot runner mold 7 are in the same plane in the XOZ coordinate system. Furthermore, in conjunction with… Figure 11 The probe protective cover 41 is fixedly installed on the swing arm 40, and the swing arm 40 is driven by the rotary cylinder 38 to realize the reciprocating swing of the probe protective cover 41.

[0058] Combination Figure 12 The hydraulic cooling system is located behind the machine tool base 1 and includes: a coolant tank 42, two centrifugal pumps 43, and a high-pressure oil pipe 44.

[0059] The equipment described in this invention is a CNC machine tool, combined with Figure 13 The system shown involves pneumatic and hydraulic control and transmission mechanisms. In this invention, a pneumatic control device is installed on one side of the column beam via a pneumatic lubrication control plate 45. This device includes pneumatic equipment (cylinders, air pumps, etc.), hydraulic equipment (hydraulic systems and hydraulic pumps, etc.), and electrical control equipment (operating systems for CNC machine tools, etc.). The input, operation, and program editing of parameters can be achieved using conventional techniques and do not affect the implementation of the equipment and methods described in this invention. This invention enables efficient and precise machining of hot runners in plastic molds and online measurement using a measuring probe and grating ruler, ensuring machining accuracy.

[0060] Based on the above-described equipment implementation, the processing method provided by the present invention is as follows:

[0061] (1) First, clamp the hot runner mold 7: Input the total length of the hot runner mold 7 to be processed and the blank length into the CNC system. The system automatically calculates and positions the Y-axis position of the center support slide 9. Manually place the hot runner mold 7 on the left floating support frame 8 and the right floating support frame 17, and start the automatic processing mode. The hydraulic center support 11 continues to move the set distance along the Y-axis, so that the hot runner mold 7 is pushed into the spindle clamp 6. Then, the positioning cylinder 15 drives the push block 12 to push the hot runner mold 7. The push rod 34 installed on the servo hydraulic turret 33 realizes the axial positioning of the hot runner mold 7. The spindle clamp 6 and the hydraulic center support 11 clamp the hot runner mold 7. The left floating support frame 8 and the right floating support frame 17 descend, and the positioning cylinder 15 returns to its original position.

[0062] (2) First online measurement: The measuring probe 39 first measures one point on the left end of the hot runner mold 7. The turret slider mechanism carries the measuring probe 39 along the Z-axis roller linear guide 25 across the hydraulic center frame 11 to measure two points on the upper and lower ends of the right end face (machined surface) of the hot runner mold 7. It is determined whether the flatness of the right end of the hot runner mold 7 is within 0.02mm. If the difference is greater than 0.02mm, the equipment alarms. If the difference is less than 0.02mm, the equipment proceeds to the next cutting step.

[0063] (3) First cutting process: The turret slider mechanism returns to the left end of the hot runner mold 7 along the Z-axis roller linear guide 25. The system automatically calculates the end face cutting width, the cutter cuts off the hot runner mold 7, leaving a 0.5mm semi-finishing allowance, and the external turning tool finishes the end face, leaving a 0.3mm finishing allowance.

[0064] (4) Second online measurement: The measuring probe 39 first measures one point on the left end of the hot runner mold 7. The turret slider mechanism carries the measuring probe 39 along the Z-axis roller linear guide 25 across the hydraulic center frame 11 to measure the upper and lower points on the right end face of the hot runner mold 7. The system automatically calculates the finishing allowance, and the equipment proceeds to the next step of cutting.

[0065] (5) Second cutting process: The turret slider mechanism returns to the left end of the hot runner mold 7 along the Z-axis roller linear guide 25. The system automatically calculates the end face cutting width, and the external turning tool finishes the end face to ensure that the total length dimension is within the tolerance range of 0.02mm and the surface roughness is ≤Ra1.6um;

[0066] (6) Third online measurement: The measuring probe 39 first measures one point on the left end of the hot runner mold 7. The turret slider mechanism carries the measuring probe 39 along the Z-axis roller linear guide 25 across the hydraulic center frame 11 to measure two points on the right end face of the hot runner mold 7. The system automatically calculates the total length of the hot runner mold 7 and judges whether the tolerance is within 0.02mm. If the difference is greater than 0.02mm, the equipment alarms. If the difference is less than 0.02mm, the equipment proceeds to the next cutting step.

[0067] (7) Third cutting process: Machining the inner hole countersunk and threads at the left end of the hot runner mold 7, ensuring that the coaxiality between the inner hole and the outer circle (the outer circle refers to the outer circle at the clamping point of the machining end) is controlled within 0.02mm, and the perpendicularity between the bottom surface of the inner hole and the outer circle (the outer circle refers to the outer circle at the clamping point of the machining end) is controlled within 0.02mm; the surface roughness of the bottom surface of the inner hole countersunk is ≤Ra1.6um;

[0068] (8) Unloading: The spindle clamp 6 and the hydraulic center frame 11 loosen the hot runner mold 7, the left floating support frame 8 and the right floating support frame 17 rise to support the hot runner mold, the hydraulic center frame 11 retreats to the set distance, and the hot runner mold 7 is manually removed.

[0069] In the subsequent mold processing process, the processing process (1) to processing process (8) are processed in sequence.

[0070] The implementation of the equipment described in this invention effectively solves the problem of inaccurate total cutting length in plastic hot runner molds, enabling the equipment to guarantee a cutting length accuracy of 0.02mm. The spindle clamp 6 is a replaceable collet, allowing for a wide range of machining diameters. The hydraulic center support 11 can slide along the Y-axis roller linear guide 20, accommodating a large range of machining lengths. Real-time position values ​​are directly fed back to the control system via the measuring probe 39 and the grating ruler 26 for online detection of the hot runner mold length and automatic calculation of the cutting depth, achieving online measurement and efficient precision machining. The tool setter corrects deviations in machining accuracy caused by tool wear and reduces auxiliary time during tool changes and adjustments. The equipment integrates efficient precision machining and online measurement, resulting in high processing efficiency and a high product qualification rate.

Claims

1. An integrated equipment for processing and online measurement of plastic hot runner molds, characterized in that: The machine tool base (1) is provided with a clamping slide mechanism. The clamping slide mechanism is provided with a spindle clamp (6), a left floating support frame (8), a hydraulic center frame (11) and a right floating support frame (17). The spindle clamp (6) and the hydraulic center frame (11) are used for fastening the workpiece. The left floating support frame (8) and the right floating support frame (17) are lifting devices. The machine tool base (1) is also provided with a column beam mechanism. The column beam mechanism is located above the machine tool base. A Z-axis roller linear guide (25) is installed through the column beam mechanism. A turret slider mechanism is slidably installed on the Z-axis roller linear guide (25). Under the action of the Z-axis ball screw pair (24) and the Z-axis servo motor (23), the servo hydraulic turret (33) and the measuring probe (39) installed on the turret slider mechanism can slide across the hydraulic center frame (11). A grating ruler (26) is provided on the column beam mechanism. The grating ruler (26) is parallel to the Z-axis roller linear guide (25). The measuring probe (39) and the grating ruler (26) realize the measurement of the workpiece machining accuracy, detect the length of the hot runner mold online, and feed the measurement data back to the CNC system of the equipment. A tool setting device (27) is provided on the opposite end of the servo hydraulic turret (33) of the column beam mechanism for monitoring the tool damage during the machining process. The servo hydraulic turret (33) is provided with a push rod (34), which is used for axial positioning of the left end face of the plastic hot runner mold; The equipment is also equipped with a cooling device, which includes a centrifugal pump (43) and a high-pressure oil pipe (44) connected thereto. The centrifugal pump (43) sends the oil in the coolant tank (42) through the high-pressure oil pipe (44) to the servo hydraulic turret to cool and lubricate the cutting tools and workpieces during processing, and sends it to the processing groove on the machine tool base to flush away iron filings inside the machine tool. The clamping slide mechanism includes a main clamping assembly and a hydraulic center frame assembly; The main clamping assembly includes a main clamping pad (5), a spindle clamping seat (6), and a left floating support frame (8). The main clamping pad (5) is fixedly installed on the machine tool base (1), the spindle clamping seat (6) is fixedly installed on the main clamping pad (5), and the left floating support frame (8) is located on the right side of the spindle clamping seat (6). The hydraulic center frame assembly includes a center frame slide (9), a center frame support plate (10), a hydraulic center frame (11), an adjusting positioning bracket (14), a push block (12), a positioning cylinder (15), and a right floating support frame (17). The center frame support plate (10) is fixedly installed on the center frame slide (9). An adjusting shim (16) is provided between the center frame support plate (10) and the center frame slide (9). The adjusting positioning bracket (14) is fixedly installed on the center frame support plate (10). The adjusting positioning bracket (14) has a waist-shaped groove. The positioning cylinder (15) drives the push block (12) to push the left end of the hot runner mold located on the left floating support frame (8) and the right floating support frame (17) into the spindle clamp (6). The hydraulic center frame (11) is fixedly installed on the left side of the center frame support plate (10). The central frame slide (9) can move along the Y-axis roller linear guide rail and includes a Y-axis transmission mechanism.

2. The integrated equipment for processing and online measurement of plastic hot runner molds according to claim 1, characterized in that: The Y-axis transmission mechanism includes a Y-axis servo motor (18), a Y-axis ball screw pair (19), and a Y-axis roller linear guide (20). The Y-axis servo motor (18) drives the Y-axis ball screw pair (19), thereby driving the hydraulic center frame assembly connected thereto to move along the Y-axis roller linear guide (20).

3. The integrated equipment for processing and online measurement of plastic hot runner molds according to claim 2, characterized in that: A pneumatic normally closed guide rail clamp (21) is provided on the Y-axis roller linear guide rail (20). Under the control of the CNC system, the pneumatic normally closed guide rail clamp (21) locks the center frame slide (9) at any position on the Y-axis roller linear guide rail (20) through a pneumatic mechanism.

4. The integrated equipment for processing and online measurement of plastic hot runner molds according to claim 1, characterized in that: The central support plate (10) is provided with a high-pressure universal ball air nozzle (13), which is used for drying and cleaning the end of the workpiece during the hot runner mold processing.

5. The integrated equipment for processing and online measurement of plastic hot runner molds according to claim 1, characterized in that: The turret slider mechanism includes a left cross slide plate (28), an X-axis transmission mechanism, a left upper slide plate (32), a servo hydraulic turret (33), and a probe component; The left cross slide plate (28) is slidably mounted on the Z-axis roller linear guide rail (25), which drives the turret slider mechanism to slide along the Z-axis. The left cross slide plate (28) is also provided with an X-axis roller linear guide rail (31). The X-axis transmission mechanism is mounted on the left cross slide plate (28) and drives the X-axis ball screw pair (30) through the X-axis servo motor, which drives the turret slider mechanism to feed along the X-axis roller linear guide rail (31). The servo hydraulic turret (33) is fixed on the upper left slide plate (28), which is fixedly connected to the nut of the X-direction ball screw pair (30) and can slide along the X-direction roller linear guide (31).

6. The integrated equipment for processing and online measurement of plastic hot runner molds according to claim 5, characterized in that: The probe component includes a probe bracket (36), a cylinder fixing plate (37), a rotary cylinder (38), a measuring probe (39), a swing rod (40), and a probe protective cover (41). The probe component is fixedly installed on the upper left slide plate (32), and a probe bracket adjustment plate (35) is provided in the middle.

7. The integrated equipment for processing and online measurement of plastic hot runner molds according to claim 1, characterized in that: The device is equipped with a main motor (2) and a photoelectric encoder (3) on the machine tool base (1). The main motor (2) drives the spindle holder (6) to rotate through the synchronous belt (4) and drives the hot runner mold to rotate. The equipment is equipped with a pneumatic lubrication control plate (45) via a column beam (22) for lubricating the ball screw pair and the roller linear guide transmission components. The equipment is also equipped with a pneumatic control mechanism to provide air supply for the positioning cylinder, probe protective cover, left floating support frame, right floating support frame, pneumatic normally closed guide rail clamp, and high-pressure universal ball air nozzle; and a hydraulic control mechanism to control the clamping and loosening of the hydraulic center frame, the clamping and loosening of the spindle holder, and the clamping and loosening of the servo hydraulic turret.

8. A hot runner mold processing method applied to the integrated equipment for processing and online measurement of plastic hot runner molds as described in claim 1, comprising equipment assembly and initial position setting, inputting the total length of the hot runner mold (7) to be processed and the blank length in the CNC system, calculating and positioning the Y-axis position of the center frame slide (9) in the system, placing the hot runner mold (7) on the left floating support frame (8) and the right floating support frame (17), and starting the processing operation, characterized in that: It also includes the following steps: S1. Control the hydraulic center frame (11) to continue moving a set distance along the Y direction, so that the hot runner mold (7) is pushed into the spindle clamp (6). Then the positioning cylinder (15) drives the push block (12) to push the hot runner mold (7). The push rod (34) on the servo hydraulic turret (33) realizes the axial positioning of the hot runner mold (7). The spindle clamp (6) and the hydraulic center frame (11) clamp the hot runner mold (7). The left floating support frame (8) and the right floating support frame (17) descend, and the positioning cylinder (15) retreats to its original position. S2. The measuring probe (39) first measures one point on the left end of the hot runner mold (7). The turret slider mechanism carries the measuring probe (39) along the Z-axis roller linear guide (25) across the hydraulic center frame (11) and then measures the upper and lower points on the right end face of the hot runner mold (7). It determines whether the flatness of the right end of the hot runner mold (7) is within 0.02mm. If the difference is greater than 0.02mm, the control equipment alarms and stops working; if the difference is less than 0.02mm, the equipment proceeds to the next cutting step. S3. The turret slider mechanism returns to the left end of the hot runner mold (7) along the Z-axis roller linear guide (25). The CNC system calculates the end face cutting width, the cutter cuts the hot runner mold (7), leaving a 0.5mm semi-finishing allowance, and the external turning tool finishes the end face, leaving a 0.3mm finishing allowance. S4. The measuring probe (39) first measures one point on the left end of the hot runner mold (7). The turret slider mechanism carries the measuring probe (39) along the Z-axis roller linear guide (25) across the hydraulic center frame (11) and then measures the upper and lower points on the right end face of the hot runner mold (7). The CNC system calculates the finishing allowance and the equipment performs the next step of cutting. S5. The turret slider mechanism returns to the left end of the hot runner mold (7) along the Z-axis roller linear guide (25). The system automatically calculates the end face cutting width and the external turning tool finishes the end face to ensure that the total length dimension is within the tolerance range of 0.02mm and the surface roughness is ≤Ra1.6μm. S6. The measuring probe (39) first measures one point on the left end of the hot runner mold (7). The turret slider mechanism carries the measuring probe (39) along the Z-axis roller linear guide (25) across the hydraulic center frame (11) and then measures the upper and lower points on the right end face of the hot runner mold (7). The CNC system calculates the total length of the hot runner mold (7) and judges whether the tolerance is within 0.02mm. If the difference is greater than 0.02mm, the equipment alarms; if the difference is less than 0.02mm, the equipment proceeds to the next cutting step. S7. Machining the hot runner mold (7) left end inner hole countersunk and thread, ensuring that the coaxiality of the inner hole and the outer circle is controlled within 0.02mm, and the perpendicularity of the bottom surface of the inner hole and the outer circle is controlled within 0.02mm; the surface roughness of the bottom surface of the inner hole countersunk is ≤Ra1.6μm; S8, the spindle clamp (6) and hydraulic center frame (11) loosen the hot runner mold (7), the left floating support frame (8) and the right floating support frame (17) rise to support the hot runner mold, the hydraulic center frame (11) retreats to the set distance, and the hot runner mold (7) is removed.

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