Full-automatic machining production line for shaft workpieces

Abstract

The utility model relates to a full-automatic processing production line for shaft workpieces, which comprises a circular sawing machine, a numerical control lathe and a flat milling machine which are sequentially arranged from back to front and are respectively provided with an automatic workpiece feeding device and an automatic workpiece discharging device, and workpiece lifting devices are arranged among the devices and are used for completing automatic splicing of the workpieces. By means of the design, all procedures of turning, milling and drilling of shaft workpieces can be automatically completed on one production line, multi-station simultaneous machining can be achieved, production efficiency is greatly improved, and manpower is saved.

Description

Technical Field

[0001] The present invention relates to processing equipment for shaft workpieces, and specifically to a full-automatic turning, drilling and milling processing production line for shaft workpieces. Background Art

[0002] The processing of shaft workpieces includes truncating, turning, milling flat, drilling or grooving of round steel (or round tube) blanks. Currently, each piece of equipment processes independently and separately. Our company has successively developed a horizontal numerically controlled automatic lathe for shaft workpieces with double processing positions and automatic loading and unloading, with the patent number ZL202110247174.8

[0003] And its supporting automatic loading and unloading device (ZL202120480910X, ZL2021204809167), but another machine is still required for milling flat processing. The key is that the processing of the above several processes is carried out separately and requires manual and auxiliary lifting equipment for assistance. There is also no report on a similar production line that can form automatic processing. Summary of the Invention

[0004] The purpose of the present invention is to mainly utilize the existing processing equipment for shaft workpieces, and through new design, form a continuous and automatically controlled production line to realize the full automation of processing from the truncation of shaft blank workpieces to turning, milling, drilling, etc., so as to improve production efficiency.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A full-automatic processing production line for shaft workpieces, including a circular sawing machine, a numerically controlled lathe, and a milling flat machine arranged in sequence from back to front. Each of the above-mentioned devices has an automatic workpiece loading device and an automatic workpiece unloading device, and there is a workpiece lifting device between each device responsible for completing the automatic connection of workpieces.

[0007] The workpiece lifting device has a downwardly inclined storage slide, a pushing device, a relatively high-positioned guide plate, and a machine base from back to front. The guide plate is downwardly inclined from back to front and is connected to the storage slide of the equipment in front of it;

[0008] The pushing device drives a pushing plate to move up and down in cooperation with a cylinder and a linear guide arranged on the base. The cylinder switch command comes from the signal of a photosensor at the rear end of the storage slide of the equipment in front of the workpiece lifting device; the width of the pushing plate is limited to only being able to push up one workpiece each time;

[0009] A photosensor is also provided at the rear end of the storage slide for giving a delay start command to the equipment at the rear.

[0010] The numerically controlled lathe includes an automatic workpiece loading and positioning device and a cylindrical clamping numerically controlled rotary chuck, and a set of numerically controlled turning tool assemblies are provided on each side of the chuck.

[0011] The milling and flattening machine described above is a double-sided four-station CNC milling machine.

[0012] The CNC four-station milling machine includes an automatic loading and clamping device for shaft workpieces and four milling cutter head assemblies that can move three-dimensionally and are controlled by servo motors. The four milling cutter head assemblies are symmetrically distributed near the four corners of the milling machine table. A milling cutter controlled by a servo motor is provided on each milling cutter head assembly, and the front of the milling cutter faces the machining position of the shaft workpiece.

[0013] The automatic loading and clamping device for workpieces includes a storage slide, two sets of symmetrically arranged double-V-groove workpiece pallets that can be controlled to move forward / backward and up / down, and two sets of clamping devices. At least one of the clamping devices is provided with a positioning push rod for positioning the left-right movement of the workpiece.

[0014] The two double-V-groove workpiece pallets are parallel to each other and are located on both sides of the milling machine table. Each V-groove workpiece pallet is connected to the upper end of a vertical cylinder, and the lower end of the vertical cylinder is supported on a horizontal line gauge. The line gauge is parallel to the length direction of the double-V-groove workpiece pallet and perpendicular to the length direction of the workpiece placement.

[0015] The pusher device at the front end of the storage slide lifts the workpiece and drops it into the rear V-groove of the double-V-groove workpiece pallet. When the double-V-groove pallet is lifted, the V-groove at its front end also simultaneously lifts the machined workpiece from the released clamping device. When the double-V-groove workpiece pallet is controlled to move forward along the line gauge and then drops, the workpiece in the rear V-groove is sent into the V-groove of the positioning and clamping device, and at the same time, the machined workpiece in the front V-groove of the double-V-groove pallet is brought onto the receiving table.

[0016] Due to the above design, the turning, milling, and drilling processes of shaft workpieces can be automatically completed on a single production line, and multi-station simultaneous processing can be achieved, greatly improving production efficiency and saving labor. Brief Description of the Drawings

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] In the drawings:

[0019] Figure 1 is the production line logic diagram of the present invention;

[0020] Figure 2 is the plane layout diagram of the production line in the embodiment;

[0021] Figure 3 is the structural schematic diagram of the workpiece lifting device;

[0022] Figure 4 is the three-dimensional view of the milling and flattening machine;

[0023] Figure 5Schematic diagram of the double-V-groove pallet structure on the milling and flattening machine;

[0024] Figure 6 Schematic diagram of the milling cutter head assembly structure on the milling and flattening machine;

[0025] Figure 7 Schematic diagram of the workpiece clamping and fixing device structure on the milling and flattening machine;

[0026] Figure 8 Partial structure schematic diagram of the lifting device.

[0027] In the figure, 1. Circular sawing machine, 2. Lifting device, 3. Double-station CNC lathe, 4. Milling and flattening machine, 201. Storage slide support seat, 202. Storage slide, 203. Pusher pallet, 204. Guide plate, 205. Side support plate, 206. Machine base, 207. Linear guide, 208. Cylinder, 401. Bed, 402. Fixed worktable, 403. Moving worktable, 404. Cross slide, 405. Workpiece clamping and fixing device, 406. Linear guide, 407. Workpiece lifting and moving device, 408. Guide rack, 409. Feeding pusher rack, 4010. Lead screw; 404-1. Servo motor, 404-2. Servo motor, 404-3. Y-direction moving slide, 404-4. Servo motor, 404-5. Milling cutter power head, 404-6. Servo motor, 404-7. Z-direction moving slide, 404-8. X-direction moving slide, 405-1. Oil cylinder, 405-2. Linear guide, 405-3. Pressure block, 405-4. Side support plate, 405-5. Cylinder, 405-6. Spacer block, 405-7. Cylinder bracket, 407-1. Double-V-groove workpiece pallet, 407-2. Cylinder, 407-3. Linear guide, 407-4. Lead screw, 407-5. Servo motor, 409-1. Loading platform, 409-2. Pusher plate, 409-3. Cylinder. Specific implementation mode

[0028] A fully automatic processing method for shaft workpieces, from truncating the blank shaft workpiece, to turning the workpiece, and then to milling and flattening or milling grooves or drilling the workpiece, several processes are automatically completed on a production line.

[0029] Specifically, it includes the following steps:

[0030] The workpiece is truncated by the circular sawing machine 1;

[0031] The above-truncated workpieces fall into the storage slide of the first workpiece lifting device for arrangement, and the workpiece arranged at the front is lifted and continuously connected to the storage slide 202 in front of it for arrangement;

[0032] The workpiece at the very front of the above-mentioned storage slide is automatically lifted and positioned into the cylindrical clamping and rotating chuck of the double-station horizontal CNC lathe 3, and the turning process is completed by the double-station turning tool assemblies on both sides of the cylindrical clamping and rotating chuck;

[0033] The turned workpieces automatically fall into the storage slide of the second workpiece lifting device. The workpiece at the very front is lifted and continuously transferred to the storage slide in front of it;

[0034] The automatic loading device of the milling and flattening machine 4 lifts the workpiece at the very front of the above-mentioned storage slide and fixes it with the positioning and clamping device, exposing the machining parts at both ends of the workpiece. The four three-dimensionally movable milling cutter assemblies symmetrically arranged near the four corners of the milling and flattening machine respectively complete the milling and flattening or grooving or drilling of the four workstations of the shaft workpiece. The four workstations can be controlled for simultaneous machining or separate machining;

[0035] The machined workpieces automatically fall into the receiving table and are arranged.

[0036] The storage slide is a slide that slopes downward from back to front. There is a ejector plate driven by a cylinder at the very front end of the slide. The width of the ejector plate is limited to lifting only one workpiece at a time;

[0037] There is a light induction signal switch at the rear end of the storage slide, which can sense the presence or absence of the last workpiece arranged on the storage slide. When it senses that there is no workpiece, it will delay the control of the switch of the subsequent equipment to start.

[0038] A full-automatic processing production line for shaft workpieces includes a circular sawing machine, a CNC lathe, and a milling and flattening machine arranged in sequence from back to front. Each of the above-mentioned equipment has an automatic workpiece loading device and an automatic workpiece unloading device, and there is a workpiece lifting device between each equipment to be responsible for the automatic continuous connection of the workpieces.

[0039] The workpiece lifting device has a downward-sloping storage slide, a ejector device, a relatively high guide plate 204, and a machine base 206 from back to front. The guide plate slopes downward from back to front and is continuously connected to the storage slide of the equipment in front of it;

[0040] The ejector device drives the ejector plate to move up and down in cooperation with a cylinder and a linear guide arranged on the base. The cylinder switch command comes from the signal of the light sensor at the rear end of the storage slide of the equipment in front of the workpiece lifting device; the width of the ejector plate is limited to only being able to lift one workpiece each time;

[0041] A light sensor is also provided at the rear end of the storage slide to give a delay start command to the subsequent equipment.

[0042] The CNC lathe includes a workpiece automatic loading and positioning device and a cylindrical clamping CNC rotating chuck. A set of CNC turning tool assemblies is provided on each side of the chuck.

[0043] The milling and flattening machine described above is a double-sided four-station CNC milling machine.

[0044] The CNC four-station milling machine includes an automatic loading and clamping device for shaft workpieces and four three-dimensionally movable milling cutter head assemblies controlled by servo motors. The four milling cutter head assemblies are symmetrically distributed near the four corners of the milling machine table. Each milling cutter head assembly is equipped with a milling cutter controlled by a servo motor, and the front of the milling cutter faces the machining position of the shaft workpiece.

[0045] The automatic loading and clamping device for workpieces includes a storage slide, two sets of symmetrically arranged double-V groove workpiece pallets that can be controlled to move forward / backward and up / down, and two sets of clamping devices. At least one of the clamping devices is equipped with a positioning push rod for positioning the left-right movement of the workpiece.

[0046] The two double-V groove workpiece pallets are parallel to each other and are located on both sides of the milling machine table. Each V groove workpiece pallet is connected to the upper end of a vertical cylinder, and the lower end of the vertical cylinder is supported on a horizontal line gauge. The line gauge is parallel to the length direction of the double-V groove workpiece pallet and perpendicular to the length direction of the workpiece placement.

[0047] The ejector device at the front end of the storage slide lifts the workpiece and drops it into the rear V groove of the double-V groove workpiece pallet. When the double-V groove pallet is lifted, the V groove at its front end also simultaneously lifts the machined workpiece from the loosened clamping device. When the double-V groove workpiece pallet is controlled to move forward along the line gauge and then drop, the workpiece in the rear V groove is sent into the V groove of the positioning and clamping device, and at the same time, the machined workpiece in the front V groove of the double-V groove pallet is brought onto the receiving table.

[0048] Considering that the processing speeds of the circular sawing machine, CNC lathe, and milling and flattening machine are not synchronized, storage slides are provided in front of each device in this design. Through photoelectric signal delay control, the machine with a faster processing speed can be made to intermittently process several workpieces continuously. For example, the circular sawing machine has a faster processing speed. When several blank workpieces are continuously sawed off and the storage slide is full, it will pause. When the photoelectric signal senses that there is no workpiece in the last row on the storage slide, it will be delayed until there are almost no workpieces on the storage slide and then the circular sawing machine will be started to work again. The length of the delay control time can be set through the computer control platform on the circular sawing machine. The principle of the intermittent time control of the CNC lathe is the same as that of the delay control of the circular sawing machine.

Claims

1. A fully automatic production line for processing shaft workpieces, comprising a circular saw, a CNC lathe, and a flattening machine arranged in sequence from back to front, characterized in that The above equipments are respectively equipped with automatic workpiece loading devices and automatic workpiece unloading devices, and there are workpiece lifting devices between the equipments to complete the automatic connection of the workpieces.

2. The fully automatic processing production line for shaft workpieces according to claim 1 is characterized in that The workpiece lifting device has a material storage slide that tilts downward from the back to the front, a material lifting device, a relatively high material guide plate, and a machine base. The material guide plate tilts downward from the back to the front and is connected to the material storage slide of the device in front of it. The ejector device is driven by a cylinder and a wire gauge arranged on a base to drive the ejector plate to move up and down. The cylinder switch command comes from the delayed signal of the photosensitive sensor at the rear end of the storage slide of the equipment in front of the workpiece lifting device. The width of the ejector plate is limited to only enough to lift one workpiece at a time. A light sensor is also provided at the rear end of the material storage slide, which senses the presence or absence of the last workpiece arranged on the material storage slide and is used to give a delayed start instruction to the rear equipment.

3. The fully automatic processing production line for shaft workpieces according to claim 1 is characterized in that The CNC lathe comprises a workpiece automatic loading and positioning device and a cylindrical clamping CNC rotary chuck, and a set of CNC turning tool assemblies are respectively arranged on both sides of the chuck.

4. The fully automatic processing production line for shaft workpieces according to claim 1 is characterized in that The flattening machine is a double-sided four-station CNC milling machine.

5. The fully automatic processing production line for shaft workpieces as claimed in claim 4 is characterized in that The double-sided four-station CNC milling machine includes an automatic loading, clamping and fixing device for shaft workpieces, four three-dimensionally movable milling cutter frame assemblies controlled by servo motors, the four milling cutter frame assemblies are symmetrically distributed near the four corners of the milling machine frame, and the milling cutter frame assembly is provided with a milling cutter controlled by a servo motor, and the front of the milling cutter faces the processing position of the shaft workpiece.

6. The fully automatic processing production line for shaft workpieces as claimed in claim 5 is characterized in that The workpiece automatic feeding clamping and fixing device comprises a material storage slide, two sets of symmetrically arranged double V-groove workpiece support plates that can move forward and backward and up and down, and two sets of clamping and fixing devices, at least one of which has a positioning push rod for left and right movement positioning of the workpiece; The two double V-groove workpiece support plates are parallel to each other and are located on both sides of the milling machine. Each double V-groove workpiece support plate has two V-grooves, one in front and one in the back. The support plate is connected to the upper end of a vertical cylinder. The lower end of the vertical cylinder is supported on a horizontal wire gauge. The wire gauge is parallel to the length direction of the double V-groove workpiece support plate and is perpendicular to the length direction of the workpiece. The lifting device at the front end of the material storage slide lifts the workpiece and drops it into the rear end V-groove of the double V-groove workpiece pallet. When the double V-groove pallet is lifted, the V-groove at the front end also lifts the processed workpiece from the loosened clamping device. When the double V-groove workpiece pallet is controlled to move forward along the wire gauge and fall into place, the workpiece in the rear end V-groove will be sent into the V-groove of the positioning clamping device, and at the same time, the processed workpiece in the front end V-groove of the double V-groove pallet will be brought to the material receiving table.

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