Machining device for stepped surface of inner cavity of large workpiece

Abstract

The utility model relates to the technical field of machining, and discloses a large workpiece inner cavity stepped surface machining device which comprises a first workbench, an outer gantry frame support is slidably connected to the outer side of the first workbench, and a rotary supporting mechanism is arranged in the middle of the bottom side of the top end of the outer gantry frame support. An inner gantry stand column is arranged at the bottom end of the rotary supporting mechanism, a second workbench is fixedly connected to the bottom end of the inner gantry stand column, a cross beam is slidably connected to the inner side of the middle end of the inner gantry stand column, a slide carriage ram is slidably connected to the top end of the cross beam, a main shaft is fixedly connected to the top end of the cross beam, and a side milling head is fixedly connected to the front end of the slide carriage ram. According to the device, all inner cavity stepped surfaces can be machined after one-time clamping and tool setting, the problem that an operator repeatedly clamps and sets the tool is solved, the production efficiency and the workpiece machining precision are improved, meanwhile, different tools and accessory milling heads are replaced, the stepped surfaces with different section shapes can be machined, and the purpose of a machine tool is extended.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a device for processing the inner cavity step surface of a large workpiece. Background Art

[0002] With the continuous progress and development of industrial manufacturing technology, the demand for large workpiece inner cavity step surface processing is increasing, and traditional processing methods can no longer meet the requirements for processing accuracy, efficiency and quality. In order to solve this problem, the present invention proposes a large workpiece inner cavity step surface processing device, which aims to improve processing efficiency, ensure processing accuracy and enhance processing quality.

[0003] In the prior art, the milling process of the inner cavity step surface of a large workpiece is to clamp the workpiece on a large horizontal lathe, then use the horizontal boring machine slide to extend to process the inner cavity step surface of the workpiece, and then rotate the workpiece 90 degrees to process the vertical step surface. Because the extension stroke of the horizontal boring machine is not enough to process the entire step surface length, the workpiece needs to be turned around and clamped twice before the processing is completed. Alternatively, the workpiece is clamped on the rotary table of a heavy-duty CNC vertical lathe, and the vertical lathe tool holder extends into the workpiece to process the step surface. The workpiece rotates 90 degrees and then processes the vertical step surface. Similarly, due to insufficient up and down strokes, the workpiece needs to be turned around and clamped twice before the processing is completed.

[0004] The above processing method results in the processing accuracy of the workpiece being achieved through manual adjustment, repeated measurement of tool setting and machine tool performance. Since the parts themselves are heavy, clamping adjustment and measurement of tool setting are difficult; and the stainless steel blank has a large processing allowance, which requires multiple passes to complete on existing general-purpose machine tools. The processing efficiency is low, the cost is high, and it cannot meet the needs of large-scale production.

[0005] In view of this, the utility model proposes a device for machining the inner cavity step surface of a large workpiece. Utility Model Content

[0006] The utility model provides a large workpiece inner cavity step surface processing device, which solves the problems of low processing efficiency and high cost in related technologies.

[0007] The technical solution of the utility model is as follows: a large workpiece inner cavity stepped surface processing device, comprising a first worktable, the outer side of the first worktable is slidably connected to an outer gantry frame support, a slewing support mechanism is arranged in the middle of the bottom side of the top end of the outer gantry frame support, an inner gantry column is arranged at the bottom end of the slewing support mechanism, the bottom end of the inner gantry column is fixedly connected to the second worktable, the inner side of the middle end of the inner gantry column is slidably connected to a crossbeam, the top end of the crossbeam is slidably connected to a slide plate and a ram, the top end of the crossbeam is fixedly connected to a spindle, and the front end of the slide plate and a ram is fixedly connected to a side milling head.

[0008] Preferably, left and right opposing clamps are provided on the outer side of the top end of the first workbench.

[0009] Preferably, an operating table is fixedly connected to the right bottom end of the outer gantry frame support on the right side.

[0010] Preferably, the main shaft is slidably connected to the slide ram.

[0011] Preferably, the inner gantry column is slidably connected to the first workbench.

[0012] Preferably, the first workbench is flush with the ground, and the second workbench is installed in an integrally sunken position.

[0013] The working principle and beneficial effects of the utility model are:

[0014] In the utility model, the device can process all the inner cavity step surfaces after one clamping and tool setting, which solves the pain point of repeated clamping and tool setting for operators, improves production efficiency and workpiece processing accuracy, and is suitable for processing inner cavity step surfaces with a maximum inner cavity size of 3200mm, a maximum outer diameter of 4000mm, and a maximum height of 5000mm. By replacing different tools and equipping different accessory milling heads, step surfaces with different cross-sectional shapes can be processed, extending the use of the machine tool. At the same time, if the workpiece size increases by an order of magnitude (such as: inner cavity step surfaces with an inner cavity size of 5000-6000mm and a height of 8000-9000mm), the diameter of the second workbench and the height of the inner gantry column can be increased accordingly, forming a series of products for inner cavity step surface processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] In the figure: 1. first workbench; 2. second workbench; 3. inner gantry column; 4. crossbeam; 5. slide plate and ram; 6. main axis; 7. side milling head; 8. outer gantry frame support; 9. rotary support mechanism; 10. fixture; 11. operating table. DETAILED DESCRIPTION

[0018] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Example 1

[0020] The preferred embodiment of the large workpiece inner cavity step surface processing device provided by the utility model is as follows Figure 1 As shown: a large workpiece inner cavity step surface processing device, including a first worktable 1, the outer side of the first worktable 1 is slidably connected to an outer gantry frame support 8, a slewing support mechanism 9 is arranged in the middle of the bottom side of the top end of the outer gantry frame support 8, and the slewing support mechanism 9 is slewed by the beam at the top end of the outer gantry frame support 8. The slewing support mechanism 9 is composed of a slewing support frame, a slewing shaft, a driving device, a control system and a fixed structure, and the slewing support frame is the main part of the support mechanism, which is connected to the frame or support structure of the device to provide a support point for the slewing motion; the slewing shaft is located at the center of the slewing support frame and is responsible for supporting the slewing motion of the workpiece or tool. It can be a bearing or other type of support structure to ensure that the workpiece or tool can rotate stably; the driving device is responsible for driving the slewing shaft to rotate, and it is usually composed of a motor, a reducer and a transmission device to provide the The required rotational power and control; the control system is used to monitor and adjust the speed, direction and position of the rotary motion; the fixed structure connects the rotary support frame and other parts of the device to ensure that the support mechanism is firmly and reliably installed on the device and withstands the rotational motion of the workpiece or tool. An inner gantry column 3 is arranged at the bottom end of the rotary support mechanism 9, and the bottom end of the inner gantry column 3 is fixedly connected to the second workbench 2, and the inner gantry column 3 is supported and fixed by the second workbench 2. The inner side of the middle end of the inner gantry column 3 is slidably connected to the crossbeam 4, and the crossbeam 4 is limited by the slide rail on the inner gantry column 3. The top of the crossbeam 4 is slidably connected to a slide ram 5, and the top of the crossbeam 4 is fixedly connected to a spindle 6, and the front end of the slide ram 5 is fixedly connected to a side milling head 7. The inner gantry main machine is composed of the inner gantry column 3, the crossbeam 4, the slide ram 5 and the spindle 6, etc., which can realize the movement in three directions of X\Y\Z. The entire inner gantry main machine is installed on the second workbench 2, a side milling head 7 is installed at the front end of the slide ram 5, and an auxiliary gantry is provided on the outside of the main machine to support the inner gantry column 3 to increase the rigidity of the inner gantry column 3; the inner gantry main machine can be moved to the outside of the second workbench 2 and installed on the external workbench to realize processing requirements such as external locating pins of the processed cylinder, external longitudinal seam grooves of the cylinder, milling of external straight sections of the cylinder, and checking of the inner cylindricity of the cylinder. At the same time, the side milling head 7 is installed on the crossbeam 4 through the slide ram 5, and the side milling head 7 can move forward and backward / left and right. The up and down moving mechanism of the side milling head 7 is installed on the inner gantry column 3, and the crossbeam 4 is synchronously driven up and down by a double screw.

[0021] Example 2

[0022] On the basis of Example 1, a preferred embodiment of a large workpiece inner cavity step surface processing device provided by the utility model is as follows: Figure 1As shown: left and right opposite clamps 10 are arranged on the outer side of the top of the first workbench 1, and the clamps 10 are driven by separate hydraulic rods on both sides, thereby driving the clamps 10 on both sides to move left and right to fix the workpiece.

[0023] In this embodiment, an operating table 11 is fixedly connected to the right bottom end of the right outer gantry frame support 8, and the operating table 11 is used to control the overall operation of the equipment.

[0024] In this embodiment, the main shaft 6 is slidably connected to the slide ram 5, and the slide ram 5 is limited by the main shaft 6. The slide ram 5 cooperates with the lead screw and the driving motor that drives it to rotate, driving the slide ram 5 to move forward and backward at the top of the crossbeam 4.

[0025] In this embodiment, the inner gantry column 3 is slidably connected to the first workbench 1 .

[0026] In this embodiment, the first workbench 1 is flush with the ground, and the second workbench 2 is installed in an integrally sunken manner.

[0027] The working principle and use process of the utility model are as follows: the device is an inner and outer double gantry structure. When processing the inner cavity, the inner gantry column 3 is mounted on the second workbench 2, and the workpiece is mounted on the first workbench 1 and fixed; when processing the outer arm hole and the weld, the inner gantry column 3 is mounted on the first workbench 1 and fixed, and the workpiece is mounted on the second workbench 2 for rotation processing. The inner cavity step surface processing process: after the beam at the top of the outer gantry frame support 8 is removed, the workpiece is hoisted and passed through the top of the inner gantry column 3, falls into the fixture 10, and then the center of the workpiece and the first The centers of the two workbenches 2 are aligned. Move the beam at the top of the outer gantry frame support 8 to the center of the second workbench 2. Then lock the beam at the top of the outer gantry frame support 8 first, then lock the inner gantry column 3, then align the tool and the workpiece, then mill the 0° step surface of the inner cavity, then release the clamp 10, rotate the second workbench 2 90° and then lock the clamp 10, then mill the 90° step surface of the inner cavity, then release the clamp 10, rotate the second workbench 2 180° and then lock the clamp 10, and mill the 180° step surface of the inner cavity, then The clamp 10 is released, the second workbench 2 rotates 270° and then locks the clamp 10 and mills the 270° step surface of the inner cavity, then the clamp 10 is released, the second workbench 2 rotates 270° in the opposite direction and clamps the clamp 10, the inner gantry is released and the beam at the top of the outer gantry frame support 8 is locked and released, then the beam at the top of the outer gantry frame support 8 is moved to the outside of the workpiece, and then the workpiece is hoisted to the outside of the inner gantry, and then a new workpiece is loaded, and the above process is repeated to process the next piece; Processing process of outer arm holes and welds of cylindrical workpieces: outer gantry frame Remove the beam at the top of the support 8, disassemble the inner gantry from the second workbench 2, hoist it as a whole to the designated position on the first workbench 1 fixed on the ground, install and tighten it, then connect and fix the crossbeam 4 to the beam at the top of the outer gantry frame support 8, then hoist the cushion block onto the second workbench 2 and fix it, with the upper plane flush with the ground, and install the workpiece on the upper plane of the cushion block on the second workbench 2, and then process the outer diameter surface of the workpiece using three axes plus the second workbench 2, a total of four axes. After the processing is completed, the four axes return to their positions, the workpiece can be unloaded, and the above process is repeated to process the next piece.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A large workpiece inner cavity step surface processing device, comprising a first workbench (1), characterized in that: The first workbench (1) is slidably connected to an outer gantry frame support (8) on the outside, a slewing support mechanism (9) is provided at the middle of the bottom side of the top end of the outer gantry frame support (8), an inner gantry column (3) is provided at the bottom end of the slewing support mechanism (9), the bottom end of the inner gantry column (3) is fixedly connected to the second workbench (2), the inner side of the middle end of the inner gantry column (3) is slidably connected to a crossbeam (4), the top end of the crossbeam (4) is slidably connected to a slide plate ram (5), the top end of the crossbeam (4) is fixedly connected to a spindle (6), and the front end of the slide plate ram (5) is fixedly connected to a side milling head (7).

2. A large workpiece inner cavity step surface processing device according to claim 1, characterized in that: The top outer side of the first workbench (1) is provided with left and right opposing clamps (10).

3. A large workpiece inner cavity step surface processing device according to claim 1, characterized in that: An operating table (11) is fixedly connected to the right bottom end of the outer gantry frame support (8) on the right side.

4. A large workpiece inner cavity step surface processing device according to claim 1, characterized in that: The main shaft (6) is slidably connected to the slide ram (5).

5. The large workpiece inner cavity step surface processing device according to claim 1 is characterized in that: The inner gantry column (3) is slidably connected to the first workbench (1).

6. The large workpiece inner cavity step surface processing device according to claim 1 is characterized in that: The first working platform (1) is flush with the ground, and the second working platform (2) is installed in an integrally sunken manner.

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