Shaft workpiece flat milling machine

Abstract

A shaft workpiece flat milling machine comprises an automatic shaft workpiece feeding, clamping and fixing device, a milling machine rack and four milling cutter rest assemblies which are controlled by a servo motor and can move in a three-dimensional mode, the four milling cutter rest assemblies are symmetrically distributed at the positions, close to the four corners, of the milling machine rack, and milling cutters controlled by the servo motor are arranged on the milling cutter rest assemblies. The front face of the milling cutter is provided with machining positions for shaft workpieces. Due to the adoption of the design, multi-station flat grooves of shaft workpieces can be machined at the same time, the production efficiency is greatly improved, and manpower is saved.

Description

Technical Field

[0001] The present invention relates to shaft workpiece equipment, and specifically to a shaft workpiece milling machine Background Art

[0002] The processing of shaft workpieces includes truncating, turning, milling flats, drilling, or grooving of round steel (or round tube) blanks. Currently, each piece of equipment processes independently and separately

[0003] The efficiency of shafts that generally need to be milled flat is low Summary of the Invention

[0004] The purpose of the present invention is to design a multi-station milling machine that can simultaneously mill flats at four stations to improve production efficiency

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: a shaft workpiece milling machine, including an automatic loading and clamping and fixing device for shaft workpieces, a milling machine bench, and four milling cutter head assemblies that can move in three dimensions and are controlled by servo motors. The four milling cutter head assemblies are symmetrically distributed near the four corners of the milling machine bench. A milling cutter controlled by a servo motor is provided on the milling cutter head assembly, and the front of the milling cutter faces the processing position of the shaft workpiece

[0006] The workpiece automatic loading and clamping and fixing device includes a storage slide, two sets of symmetrically arranged double-V-groove workpiece pallets that can move forward and backward and up and down, and two sets of clamping and fixing devices. At least one set of the clamping and fixing devices has a positioning push rod for left-right crosstalk positioning of the workpiece

[0007] The two double-V-groove workpiece pallets are parallel to each other and are located on both sides of the milling machine. There are two V-grooves, one in front and one behind, on each double-V-groove workpiece pallet. The 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

[0008] 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 processed workpiece from the loosened clamping and fixing device. When the double-V-groove workpiece pallet moves forward along the line gauge under control and then drops, the workpiece in the rear V-groove will be sent into the V-groove of the positioning and clamping device, and at the same time, the processed workpiece in the front V-groove of the double-V-groove pallet will be brought onto the receiving table

[0009] Due to the above design, multi-station flat groove machining of shaft workpieces can be achieved, greatly improving production efficiency and saving labor Brief Description of the Drawings

[0010] The following further describes the present invention with reference to the drawings

[0011] In the figure:

[0012] Figure 1 is the logic diagram of the production line of the present invention;

[0013] Figure 2 is the layout plan of the production line in the embodiment;

[0014] Figure 3 is the schematic diagram of the structure of the workpiece lifting device;

[0015] Figure 4 is the three-dimensional view of the flat milling machine;

[0016] Figure 5 is the schematic diagram of the structure of the double V-groove pallet on the flat milling machine;

[0017] Figure 6 is the schematic diagram of the structure of the milling cutter head assembly on the flat milling machine;

[0018] Figure 7 is the schematic diagram of the structure of the workpiece clamping and fixing device on the flat milling machine;

[0019] Figure 8 is the schematic diagram of the partial structure of the lifting device.

[0020] In the figure, 1. circular sawing machine, 2. lifting device, 3. double-station CNC lathe, 4. flat milling machine, 201. storage slide support seat, 202. storage slide, 203. ejector 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 frame, 409. feeding and ejecting frame, 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. pressing 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. blanking platform, 409-2. ejector plate, 409-3. cylinder. Detailed implementation mode

[0021] A full-automatic processing method for shaft workpieces, which automatically completes several processes on a production line, including truncating the blank shaft workpiece, turning the workpiece, and then milling flat or milling grooves or drilling holes in the workpiece.

[0022] Specifically, it includes the following steps:

[0023] The workpiece truncation is completed by the circular sawing machine 1;

[0024] The truncated workpieces fall into the storage slide of the first workpiece lifting device for arrangement. The workpiece at the frontmost position is lifted and continuously connected to the storage slide 202 in front of it for arrangement;

[0025] The workpiece at the frontmost position of the above storage slide is automatically lifted and positioned into the cylindrical clamping and rotating chuck of the double-working-position horizontal CNC lathe 3, and the turning process is completed by the double-working-position turning tool assembly on both sides of the cylindrical clamping and rotating chuck;

[0026] The turned workpieces automatically fall into the storage slide of the second workpiece lifting device for arrangement. The workpiece at the frontmost position is lifted and continuously connected to the storage slide in front of it for arrangement;

[0027] The automatic feeding device of the milling flat machine 4 lifts the workpiece at the frontmost position of the above storage slide and fixes it by the positioning and clamping device, exposing the processing parts at both ends of the workpiece. The four three-dimensionally movable milling cutter assemblies symmetrically arranged at the four corners near the milling flat machine respectively complete milling flat or grooving or drilling of the four working positions of the shaft workpiece, and the four working positions can be controlled for simultaneous processing or separate processing;

[0028] The processed workpieces automatically fall into the receiving table for arrangement.

[0029] The storage slide is a slide that slopes downward from back to front. There is a top plate driven by a cylinder at the frontmost end of the slide, and the width of the top plate is limited to lifting only one workpiece at a time;

[0030] 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.

[0031] A full-automatic processing production line for shaft workpieces includes a circular sawing machine, a CNC lathe, and a milling flat machine arranged in sequence from back to front. The above-mentioned equipment each has an automatic workpiece feeding device and an automatic workpiece discharging device, and there is a workpiece lifting device between each equipment responsible for completing the automatic continuous connection of the workpieces.

[0032] The workpiece lifting device has a downward-sloping storage slide, a top material 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;

[0033] The ejector device is driven by a cylinder and a wire gauge arranged on the base to drive the ejector plate to move up and down. 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 ejector plate is limited to only being able to eject one workpiece each time.

[0034] A photosensor is also provided at the rear end of the storage slide to give a delay start command to the equipment behind.

[0035] The numerically controlled lathe includes a workpiece automatic loading and positioning device and a cylindrical clamping numerically controlled rotating chuck. A set of numerically controlled turning tool assemblies is provided on each side of the chuck.

[0036] The milling and flattening machine is a double-sided four-station numerically controlled milling machine.

[0037] The numerically controlled four-station milling machine includes an automatic loading and clamping and fixing 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 the milling cutter head assembly, and the front of the milling cutter faces the machining position of the shaft workpiece.

[0038] The workpiece automatic loading and clamping and fixing device includes a storage slide, two sets of symmetrically arranged double-V groove workpiece pallets that can be controlled to move forward and backward and up and down, and two sets of clamping and fixing devices. At least one set of clamping and fixing devices has a positioning push rod for the left-right movement positioning of the workpiece.

[0039] 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. 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 pallet and perpendicular to the length direction of the workpiece placement.

[0040] The ejector device at the front end of the storage slide ejects 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 processed workpiece from the loosened clamping and fixing device. When the double-V groove workpiece pallet is controlled to move forward along the wire gauge to the in-place position and 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 processed workpiece in the front V groove of the double-V groove pallet is brought onto the receiving table.

[0041] Considering that the processing speeds of the circular sawing machine, CNC lathe, and milling and flattening machine are not synchronized, a storage slide table is set in front of each device in this design. Through the delay control of the light sensor signal, the machine with a faster processing speed can be intermittent after continuously processing several workpieces. For example, the circular sawing machine has a fast processing speed. When several blank workpieces are continuously sawed off, the storage slide table is full, and then it will pause. When the light sensor signal senses that there is no workpiece in the last row on the storage slide table, the circular sawing machine will be delayed until there are almost no workpieces on the storage slide table before starting 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 shaft workpiece milling machine, comprising an automatic feeding and clamping device for shaft workpieces, a milling machine stand, characterized in that There are also 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. The milling cutter frame assemblies are provided with milling cutters controlled by servo motors, and the front of the milling cutter faces the processing position of the shaft workpiece.

2. A shaft workpiece flattening machine as claimed in claim 1, 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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