Workpiece adjusting device and method for large planer type milling machine

Abstract

According to the workpiece adjusting device and method for the large planer type milling machine, the adjusting device comprises a knife edge side plate, a supporting side plate, two connecting rods, a rotating wheel, a rotating shaft, a spring, a locking nut, a rotating sleeve and a marking awl, the knife edge side plate and the supporting side plate are fixedly connected through the two connecting rods, and a wedge-shaped knife edge is arranged on the lower edge of the knife edge side plate; the rotating shaft is arranged in coaxial shaft holes of the knife edge side plate and the supporting side plate in a penetrating mode and rotates in the coaxial shaft holes, one end of the rotating shaft is connected with the rotating wheel, the other end of the rotating shaft is connected with the locking nut, the rotating sleeve is fixedly arranged on the rotating shaft in a sleeved mode, the marking pin is fixed to the rotating sleeve, and the spring is arranged on the rotating shaft between the supporting side plate and the locking nut in a compressed penetrating mode. Rotation of the rotating shaft is braked through friction torque, so that the position of the scriber is positioned; the correcting and adjusting device completes position correction of the workpiece from the two ends of the workpiece in the mode that the wedge-shaped knife edge is clamped on the linear scribed line of the workbench, and the scribed line is aligned with the scribing reference straight line of the workpiece through the abutting backer. The labor intensity is relieved, the working efficiency is improved, and the device has the advantages of being convenient to carry and easy to operate.

Description

Technical field

[0001] The present invention relates to a portable process device, in particular to a workpiece alignment device and alignment method for a large gantry milling machine, belonging to the technical field of machining. Background technique

[0002] For large workpieces (such as marine low-speed diesel engine frames, seats, etc.) weighing nearly a hundred tons and with dimensions exceeding 15m×5m×3m, during the existing machining process, when machining on the lathe, it is necessary to correct the straight line. The operation process is as follows: First, in the scribing process, a laser instrument is used to detect the remaining amount of each machining surface, and the center line of the workpiece is marked at both ends of the workpiece as the machining straight line reference; then the workpiece is hoisted by a crane and placed on the machine tool workbench, and then a center drill is installed through a machine tool accessory to measure back and forth along the workbench. During the process, the machine tool accessory needs to be turned 180° multiple times, and the center line of the machining reference at both ends of the workpiece is measured with the center drill to check whether it is parallel to the machine tool workbench surface. By operating multiple jacks to jack the workpiece multiple times, left and right displacement adjustment is carried out until the position accuracy of the workpiece meets that the parallelism deviation between the scribing reference center line at both ends and the straight line marking on the workbench surface is <0.5mm, thus completing the straight line correction of the workpiece.

[0003] The difficulty of the existing operation method lies in that: under the condition that the self-weight of the workpiece is nearly a hundred tons, manual operation of the jack needs to overcome the gravity of the workpiece and the friction force of left and right displacement at the same time, the labor intensity is very high, and the operation efficiency is also extremely low. Summary of the invention

[0004] The purpose of the present invention is to provide a workpiece alignment device and alignment method for a large gantry milling machine, which combines the use of a crane, the jacking backing of the machine tool, and the scribing on the workbench to straighten the workpiece, solve the problems of low work efficiency and painful operation of the machine tool operator, and achieve the effects of low investment, high efficiency, and wide applicability.

[0005] The technical solutions adopted by the present invention to solve the above technical problems are as follows:

[0006] A workpiece alignment device for a large gantry milling machine is installed on the machine tool workbench. There are straight scribing lines along the longitudinal direction on the workbench surface of the machine tool workbench. The workpiece to be machined is a large part, and the scribing reference lines are marked on both end faces; its characteristics are: the alignment device includes a knife-edge side plate, a support side plate, two connecting rods, a rotating wheel, a rotating shaft, a spring, a locking nut, a rotating sleeve, and a scribing needle;

[0007] The cutting-edge side plate and the support side plate are vertically and face each other in a plane and are arranged on the tabletop of the machine tool workbench. The lower parts are fixedly connected by the two connecting rods. The lower edge of the cutting-edge side plate is provided with a wedge-shaped cutting edge with the cutting edge facing downwards, which is used to be stuck on the straight line of the machine tool workbench. The upper parts of the cutting-edge side plate and the support side plate are provided with coaxial shaft holes. The rotating shaft is placed in the shaft holes and can rotate therein. The rotating wheel is fixedly connected to the end of the rotating shaft extending out of the outside of the cutting-edge side plate. The locking nut is threadedly connected to the end of the rotating shaft extending out of the outside of the support side plate. The rotating sleeve is sleeved and fixed on the rotating shaft between the cutting-edge side plate and the support side plate. The scribing needle is fixedly connected to the rotating sleeve along the radial direction. The spring is compressively placed on the rotating shaft between the support side plate and the locking nut, and brakes the rotation of the rotating shaft through the frictional torque generated by the spring force to position the scribing needle;

[0008] By rotating the rotating wheel to overcome the frictional torque generated by the spring, the rotating shaft, the rotating sleeve and the scribing needle are driven to rotate to adjust the directional position of the scribing needle.

[0009] Furthermore, rotate the locking nut to adjust the frictional torque generated by the spring.

[0010] Furthermore, a locking screw is threadedly connected to the rotating sleeve along the radial direction. The locking screw penetrates through the rotating sleeve and abuts against the rotating shaft to fix the rotating sleeve and the scribing needle.

[0011] Furthermore, a concave plane is arranged on the rotating shaft along the axial direction, which is used to abut against the head of the locking screw to ensure that the rotating sleeve is reliably fixed on the rotating shaft.

[0012] Furthermore, the rotating sleeve and the rotating shaft form a sliding fit and can slide axially on the rotating shaft, so as to adjust the lateral position of the scribing needle. After adjustment, tighten the locking screw to fix the rotating sleeve and the scribing needle.

[0013] Furthermore, the cutting-edge side plate and the support side plate are arranged in parallel.

[0014] Furthermore, the rotating shaft and the scribing needle are perpendicular to each other.

[0015] Another technical solution of the present invention is as follows:

[0016] A workpiece correction method for a large gantry milling machine realized by the above workpiece calibration device includes the following steps:

[0017] 1) Use a crane to hoist the workpiece to be processed above the machine tool workbench and in a semi-suspended state, so that most of the self-weight of the workpiece is loaded on the hook of the crane. One side of the workpiece leans against the top abutment of the machine tool, and the bottom surface is in contact with the tabletop of the machine tool workbench;

[0018] 2) Place the calibration device on the tabletop of the machine tool worktable at the front end of the workpiece to be processed, make the edge side plate parallel to the straight line engraving on the machine tool worktable, and the wedge-shaped edge is stuck on this straight line engraving. Loosen the locking screw, move the rotating sleeve horizontally and rotate it to adjust the alignment of the scriber with the reference straight line for scribing at the front end of the workpiece. Tighten the locking screw to fix the relative position between the scriber and the wedge-shaped edge;

[0019] 3) Move the calibration device to the tabletop of the machine tool worktable at the rear end of the workpiece, stick the wedge-shaped edge on the same straight line engraving, overcome the frictional torque generated by the spring by rotating the rotating wheel, drive the scriber to turn 180°, adjust the rear position of the workpiece through the abutting backrest, so that the reference straight line for scribing at the rear end of the workpiece is flush with the scriber, thereby making the reference straight lines for scribing at both ends of the workpiece parallel to the straight line engraving on the machine tool worktable, and completing the position calibration of the workpiece;

[0020] 4) Lower the hoist and remove the steel wire rope so that all the self-weight of the workpiece is borne on the machine tool worktable, and use a pressing plate to press the workpiece tightly on the machine tool worktable.

[0021] Further, in step 3), the parallelism deviation between the reference straight lines for scribing at both ends of the workpiece and the straight line engraving on the machine tool worktable is <0.5 mm.

[0022] The beneficial effects of the present invention are as follows:

[0023] In the semi-suspended state where the workpiece is hoisted by the hoist to the worktable, the present invention uses a handheld portable calibration device at both ends of the workpiece respectively, and adjusts the position of the workpiece through the abutting backrest, so that the parallelism deviation between the front and rear reference straight lines for scribing and the straight line engraving on the worktable is <0.5 mm, thereby completing the straightening process of the workpiece, solving the difficulty that the machine tool cannot be moved for straightening work when the workpiece is hoisted by the hoist and the straightening process must be carried out after putting down the workpiece, avoiding the displacement straightening operation under the state of the hundred-ton self-weight of the workpiece, effectively reducing the working intensity of the operator, and improving the operation efficiency. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of the present invention.

[0025] Figure 2 is a schematic diagram of the use state of the present invention.

[0026] Figure 3 is Figure 2 an enlarged view of part A of

[0027] In the figure:

[0028] 1 - Calibration device, 1-1 Knife-edge side plate, 1-2 Support side plate, 1-3 Connecting rod, 1-4 Rotating wheel, 1-5 Rotating shaft, 1-6 Spring, 1-7 Locking nut, 1-8 Sleeve, 1-9 Locking screw, 1-10 Scratching needle, 1-11 Wedge-shaped knife-edge, 2 - Workpiece, 2-1 Marking reference line, 3 - Machine tool workbench, 3-1 Linear scale mark. Detailed implementation method

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention cannot be limited thereby.

[0030] The present invention is used for the calibration operation of workpieces on a large gantry milling machine and is installed on the machine tool workbench. There are linear scale marks along the longitudinal direction on the tabletop of the machine tool workbench. The workpiece to be processed is a large part such as a marine diesel engine base, and marking reference lines are marked on both end faces of the workpiece.

[0031] Please refer to Figure 1 , the calibration device includes a knife-edge side plate 1-1, a support side plate 1-2, two connecting rods 1-3, a rotating wheel 1-4, a rotating shaft 1-5, a spring 1-6, a locking nut 1-7, a sleeve 1-8 and a scratching needle 1-10.

[0032] The knife-edge side plate 1-1 and the support side plate 1-2 are triangular plate members, which are vertically and oppositely arranged on the tabletop of the machine tool workbench 3. A wedge-shaped knife-edge 1-11 with the knife-edge facing down is provided at the lower edge of the knife-edge side plate 1-1 for clamping on the linear scale mark 3-1 of the machine tool workbench 3, as shown in Figure 3 . The knife-edge side plate 1-1 and the support side plate 1-2 are arranged in parallel and are fixedly connected at the lower part by the two connecting rods 1-3, and coaxial shaft holes are provided at the upper part.

[0033] As Figure 1As shown, the rotating shaft 1-5 is simultaneously inserted into the shaft holes in the upper parts of the cutting-edge side plate 1-1 and the support side plate 1-2, and can rotate in these shaft holes. Both ends of the rotating shaft 1-5 extend out of the outer sides of the cutting-edge side plate 1-1 and the support side plate 1-2. The rotating wheel 1-4 is fixedly connected to the end of the rotating shaft 1-5 that extends out of the outer side of the cutting-edge side plate 1-1 for rotating the rotating shaft 1-5. The locking nut 1-7 is threadedly connected to the end of the rotating shaft 1-5 that extends out of the outer side of the support side plate 1-2. The rotating sleeve 1-8 is sleeved on the rotating shaft 1-5 between the cutting-edge side plate 1-1 and the support side plate 1-2. The scribing needle 1-10 is fixedly connected to the rotating sleeve 1-8 in the radial direction, and the scribing needle 1-10 is perpendicular to the rotating shaft 1-5. A locking screw 1-9 is threadedly connected to the rotating sleeve 1-8 in the radial direction. The locking screw 1-9 penetrates through the rotating sleeve 1-8 and abuts against the rotating shaft 1-5 to fix the rotating sleeve 1-8 and the scribing needle 1-10. A recessed plane is arranged axially on the rotating shaft 1-5 to abut against the head of the locking screw 1-9 to ensure that the rotating sleeve 1-8 is reliably fixed on the rotating shaft 1-5. The rotating sleeve 1-8 and the rotating shaft 1-5 form a sliding fit and can slide axially on the rotating shaft 1-5, thereby adjusting the lateral position of the scribing needle 1-10. After adjustment, the rotating sleeve 1-8 and the scribing needle 1-10 are fixed by tightening the locking screw 1-9.

[0034] The spring 1-6 is compressively sleeved on the rotating shaft 1-5 between the support side plate 1-2 and the locking nut 1-7, and brakes the rotation of the rotating shaft 1-5 through the frictional torque generated by the spring force to position the scribing needle 1-10. Rotating the locking nut 1-7 can adjust the frictional torque generated by the spring 1-6. By rotating the rotating wheel 1-4 to overcome the frictional torque generated by the spring 1-6, the rotating shaft 1-5, the rotating sleeve 1-8, and the scribing needle 1-10 are driven to rotate, thereby adjusting the directional position of the scribing needle 1-10.

[0035] Please refer to Figure 2 and Figure 3 , the workpiece alignment method for a large gantry milling machine according to the present invention includes the following steps:

[0036] 1) Use a traveling crane to hoist the workpiece 2 to be machined above the machine tool table 3 and in a semi-suspended state, so that most of the self-weight of the workpiece 2 is loaded on the hook of the traveling crane. See Figure 2 , one side of the workpiece 2 abuts against the top stop of the machine tool, and the bottom surface contacts the table surface of the machine tool table 3.

[0037] 2) Place the calibration device 1 on the table surface of the machine tool table 3 at the front end of the workpiece 2 to be machined. See Figure 3, make the edge plate 1-1 parallel to the straight line marking 3-1 on the surface of the machine tool workbench 3, and the wedge-shaped edge 1-11 is stuck on the straight line marking 3-1; loosen the locking screw 1-9, move the rotating sleeve 1-8 horizontally and rotate it to adjust the alignment of the scriber 1-10 with the reference straight line 2-1 at the front end of the workpiece 2, and then tighten the locking screw 1-9 to fix the position distance between the scriber 1-10 and the wedge-shaped edge 1-11.

[0038] 3) Move the calibration device 1 to the surface of the machine tool workbench 3 at the rear end of the workpiece 2, and stick the wedge-shaped edge 1-11 on the same straight line marking 3-1 in step 2). Overcome the frictional torque generated by the spring 1-6 by rotating the rotating wheel 1-4 to drive the scriber 1-10 to turn 180°; adjust the rear position of the workpiece 2 through the top support, so that the reference straight line 2-1 at the rear end of the workpiece 2 is flush with the scriber 1-10, so that the reference straight line 2-1 at both ends of the workpiece 2 is parallel to the straight line marking 3-1 on the machine tool workbench 3, and the parallelism deviation is <0.5 mm to complete the position calibration of the workpiece 2.

[0039] 4) The crane lowers the hook and removes the steel wire rope, so that all the self-weight of the workpiece 2 is borne on the machine tool workbench 3, and use a pressing plate to press the workpiece 2 on the machine tool workbench 3.

[0040] The above is only a preferred embodiment of the present invention and is not used to limit the protection scope of the present invention. Any equivalent changes and modifications made according to the content of the present invention should be within the scope of protection required by the present invention.

Claims

1. A workpiece calibration device for a large gantry milling machine, installed on the machine tool workbench. There are linear scale lines along the longitudinal direction on the workbench surface of the machine tool. The workpiece to be machined is a large part, and the reference straight lines for scribing are marked on both end faces. It is characterized in that: The calibration device includes a knife-edge side plate, a support side plate, two connecting rods, a rotating wheel, a rotating shaft, a spring, a locking nut, a rotating sleeve and a scriber; The knife-edge side plate and the support side plate are vertically and oppositely arranged on the tabletop of the machine tool workbench, and are fixedly connected by the two connecting rods at the lower part. The lower edge of the knife-edge side plate is provided with a wedge-shaped knife-edge with the knife-edge facing downwards for clamping on the straight line scale on the machine tool workbench. The upper parts of the knife-edge side plate and the support side plate are provided with coaxial shaft holes. The rotating shaft is inserted into the shaft holes and can rotate therein. The rotating wheel is fixedly connected to the end of the rotating shaft extending outside the knife-edge side plate. The locking nut is threadedly connected to the end of the rotating shaft extending outside the support side plate. The rotating sleeve is sleeved and fixed on the rotating shaft between the knife-edge side plate and the support side plate. The scriber is fixedly connected to the rotating sleeve along the radial direction. The spring is compressively inserted on the rotating shaft between the support side plate and the locking nut, and brakes the rotation of the rotating shaft through the frictional torque generated by the spring force to position the scriber; By rotating the rotating wheel to overcome the frictional torque generated by the spring, the rotating shaft, the rotating sleeve and the scriber are driven to rotate to adjust the directional position of the scriber.

2. The workpiece calibration device for a large gantry milling machine according to claim 1, characterized in that: Rotate the locking nut to adjust the frictional torque generated by the spring.

3. The workpiece calibration device for a large gantry milling machine according to claim 1, characterized in that: A locking screw is threadedly connected to the rotating sleeve along the radial direction. The locking screw penetrates through the rotating sleeve and abuts against the rotating shaft to fix the rotating sleeve and the scriber.

4. The workpiece calibration device for a large gantry milling machine according to claim 3, characterized in that: The rotating shaft is provided with a recessed plane arranged along the axial direction for abutting against the head of the locking screw to ensure that the rotating sleeve is reliably fixed on the rotating shaft.

5. The workpiece alignment device for a large gantry milling machine according to claim 3 or 4, characterized in that: The rotating sleeve and the rotating shaft form a sliding fit and can slide axially on the rotating shaft, so as to adjust the lateral position of the scriber. After adjustment, tighten the locking screw to fix the rotating sleeve and the scriber.

6. The workpiece calibration device for a large gantry milling machine according to claim 1, characterized in that: The knife-edge side plate and the support side plate are arranged in parallel.

7. The workpiece calibration device for a large gantry milling machine according to claim 1, characterized in that: The rotating shaft and the scriber are perpendicular to each other.

8. A workpiece calibration method for a large gantry milling machine implemented by the workpiece calibration device according to claim 1, characterized in that: The workpiece calibration method includes the following steps: 1) Use a crane to lift the workpiece to be processed above the machine tool workbench and in a semi-suspended state, so that most of the self-weight of the workpiece is loaded on the hook of the crane. One side of the workpiece leans against the top abutment of the machine tool, and the bottom surface is in contact with the tabletop of the machine tool workbench; 2) Set the calibration device on the tabletop of the machine tool workbench at the front end of the workpiece to be processed, make the knife-edge side plate parallel to the straight line scale on the machine tool workbench, and make the wedge-shaped knife-edge clamp on the straight line scale. Loosen the locking screw, move the rotating sleeve laterally and rotate it to align the scriber with the reference straight line for scribing at the front end of the workpiece, and tighten the locking screw to fix the relative position between the scriber and the wedge-shaped knife-edge; 3) Move the calibration device to the surface of the machine tool workbench at the rear end of the workpiece, clamp the wedge-shaped knife edge on the same straight line scale. By rotating the rotating wheel to overcome the frictional torque generated by the spring, drive the scriber to turn 180°. Adjust the rear position of the workpiece through the clamping backing plate, so that the reference straight line for scribing on the rear end of the workpiece is flush with the scriber, thereby making the reference straight lines for scribing at both ends of the workpiece parallel to the straight line scale on the machine tool workbench, and completing the position calibration of the workpiece; 4) Lower the hoist and remove the steel wire rope, so that all the self-weight of the workpiece is borne on the machine tool workbench, and use a pressing plate to press the workpiece tightly on the machine tool workbench.

9. The workpiece alignment method for a large gantry milling machine according to claim 8, characterized in that: In the step 3) described above, the parallelism deviation between the reference straight lines for scribing at both ends of the workpiece and the straight line scale on the machine tool workbench is <0.5 mm.

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