Auxiliary supporting tool system for numerical control machining of cylindrical thin-wall part

Abstract

The utility model discloses an auxiliary supporting tool system for numerical control machining of a cylindrical thin-wall part, relates to the technical field of part machining, and adopts an existing auxiliary supporting device in the market, mechanical-electrical-hydraulic control is combined, the thin-wall part is supported by applying an auxiliary supporting method, and the supporting rigidity of the part is improved. The device can stretch out through a gas circuit and make contact with the surface of a workpiece through spring force, then hydraulic control is utilized, and a supporting rod for auxiliary supporting is locked, so that the supporting effect is achieved; through cooperative arrangement of a supporting sleeve, a supporting rod and a first compression spring, the touch force generated when the supporting rod makes initial contact with a part is small, and the situation that the part reversely deforms due to the fact that too large additional force is generated on the part when the part is supported is avoided; the supporting blocks are independently replaced after being abraded, the supporting blocks with different contact faces can be replaced according to the supporting requirements of different parts, the disassembly and assembly operation is more convenient through the threaded connection mode, and the applicability is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of parts processing, in particular to an auxiliary support tooling system for numerical control processing of cylindrical thin-walled parts. Background Art

[0002] Thin-walled cylindrical parts have poor rigidity and are easy to deform, which leads to tool vibration and tool letting during machining, resulting in unqualified dimensions, poor machining surface quality, and poor tool life. For example, when the machining center processes some features centered on the outside of a part, due to the long length of the part (1-2m), in the traditional process, the part is clamped at both ends and suspended in the middle. When the part is subjected to cutting force during machining, the whole part will produce huge flexural deformation, accompanied by vibration, which can easily lead to machining size deviation. The traditional process can only adopt small cutting and slow feeding to reduce the cutting force, and perform repeated compensation processing to prevent size deviation.

[0003] Therefore, in the machining process of thin-walled cylindrical parts, auxiliary tooling should be designed to enhance the rigidity of the parts and improve the processing performance of thin-walled cylindrical parts. In addition, the structure used to support and fix the parts needs to better adapt to the actual shape of the parts to improve the supporting and fixing effect. Therefore, an auxiliary support tooling system for CNC machining of cylindrical thin-walled parts is proposed. Utility Model Content

[0004] The purpose of the present application is to provide an auxiliary support tooling system for CNC machining of cylindrical thin-walled parts to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: an auxiliary support tooling system for CNC machining of cylindrical thin-walled parts, comprising a fixed shell cover and an auxiliary support mechanism, wherein the auxiliary support mechanism is installed on the inner side of the fixed shell cover;

[0006] The auxiliary support mechanism includes a plurality of auxiliary support devices, and the plurality of auxiliary support devices are symmetrically clamped on the inner side of the fixed shell;

[0007] An elastic supporting rod is installed at the output end of the auxiliary supporting device;

[0008] The end of the elastic support rod away from the auxiliary support device is detachably mounted with a support head.

[0009] Preferably, the elastic support rod comprises a support sleeve, a support rod and a compression spring;

[0010] The support rod is slidably sleeved on the inner side of the support sleeve, a fixing ring is fixedly sleeved on the outer side of the support rod, and the compression spring is fixed between the fixing ring and the support sleeve;

[0011] The support head is detachably mounted on the end of the support rod away from the support sleeve.

[0012] Preferably, a support head is detachably mounted on the end of the support rod away from the support sleeve.

[0013] Preferably, the support head comprises a support block and a threaded column, the threaded column is fixedly connected to the center of one end of the support block, and a threaded groove matched with the threaded column is provided at the end of the support rod away from the support sleeve.

[0014] Preferably, an anti-loosening structure is provided between the support block and the support rod.

[0015] Preferably, the anti-loosening structure comprises a slip ring, a first limiting wedge block, a second limiting wedge block and a second compression spring;

[0016] The slip ring is slidably sleeved on the outer side of the support rod, the compression spring 2 is fixedly connected between the slip ring and the fixed ring, the limiting wedge block 1 is fixed to the side of the slip ring close to the support block, a plurality of limiting wedge blocks 2 are provided, and a plurality of limiting wedge blocks 2 are arranged on the end surface of the support block close to the support rod in a circular array with the center of the support block, and the gap between two adjacent limiting wedge blocks 2 can just accommodate the limiting wedge block 1.

[0017] Preferably, a limit slide block is integrally provided on the inner wall of the slip ring, and a limit slide groove matched with the limit slide block is provided on the outer wall of the support rod;

[0018] Similarly, a limiting slider is integrally provided on the side surface of one end of the support rod away from the slip ring, and a limiting sliding groove matched with the limiting slider is provided on the inner wall of the support sleeve.

[0019] Preferably, a mounting block is installed on the auxiliary support device, a clamping block is integrally provided on the side end of the mounting block, a clamping groove adapted to the clamping block is provided on the inner wall of the fixed shell cover, and a protective cover covering the auxiliary support device is installed on the fixed shell cover.

[0020] In summary, the technical effects and advantages of the utility model are:

[0021] 1. In the utility model, the auxiliary support device currently available on the market is used, combined with electromechanical and hydraulic control, and an auxiliary support method is applied to support thin-walled parts to improve the support rigidity of the parts. The device can first be extended through the air circuit and contact the surface of the workpiece with spring force, and then the support rod of the auxiliary support is locked by hydraulic control to achieve the supporting effect. The auxiliary support device has a certain range of travel and can adapt to a certain range of dimensional changes of the parts to provide effective supporting effects. Through the coordinated arrangement of the support sleeve, the support rod and the compression spring, the contact force of the support rod at the initial contact with the part is small to avoid excessive additional force on the part when supporting the part, which may cause reverse deformation of the part. When in use, the support block is in direct contact with the part, and the support block can be directly replaced after wear occurs. In addition, support blocks with different contact surfaces can be replaced according to the support requirements of different parts, and the threaded connection method makes the disassembly and assembly operations more convenient and more applicable.

[0022] 2. In the utility model, through the matching arrangement of the slip ring, the limit wedge block 1, the limit wedge block 2 and the compression spring 2, when the support block is installed, during the process of the threaded column being screwed into the threaded groove, the inclined surface on the limit wedge block 1 and the inclined surface on the limit wedge block 2 will slide in contact, which will not hinder the rotation of the support block. After installation, the support block will not rotate unintentionally under the reverse limiting action of the limit wedge block 2 and the limit wedge block 1, thereby effectively preventing the support block from loosening and ensuring the stable supporting effect of the support block on the parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure in Example 1;

[0025] Figure 2 This is a schematic diagram of the structure in Example 1 when the protective cover is removed;

[0026] Figure 3 is a schematic structural diagram of the fixed housing in Example 1;

[0027] Figure 4 is a schematic structural diagram of the auxiliary supporting device in Example 1;

[0028] Figure 5 is a schematic structural diagram of the elastic supporting rod in Example 2;

[0029] Figure 6It is a schematic diagram of the disassembled structure of the elastic supporting rod in Example 2;

[0030] Figure 7 It is a schematic diagram of a further disassembled structure of the elastic supporting rod in Example 2;

[0031] Figure 8 This is a schematic diagram of the structure of the support head in Example 2.

[0032] In the figure: 1. fixed shell cover; 2. auxiliary support device; 3. elastic support rod; 31. support sleeve; 32. support rod; 33. fixed ring; 34. compression spring 1; 35. support block; 36. threaded column; 37. threaded groove; 38. slip ring; 39. limit wedge block 1; 310. limit wedge block 2; 311. compression spring 2; 312. limit slide groove; 313. limit slider; 4. mounting block; 5. clamping block; 6. clamping groove; 7. protective cover. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in 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 in 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.

[0034] Embodiment 1:

[0035] refer to Figure 1-4 An auxiliary support tooling system for numerical control machining of cylindrical thin-walled parts is shown, comprising a fixed shell 1 and an auxiliary support mechanism, wherein the auxiliary support mechanism is installed on the inner side of the fixed shell 1;

[0036] The auxiliary support mechanism includes a plurality of auxiliary support devices 2, and the plurality of auxiliary support devices 2 are symmetrically clamped on the inner side of the fixed shell 1;

[0037] An elastic supporting rod 3 is installed at the output end of the auxiliary supporting device 2 .

[0038] In summary, the auxiliary support tooling system combines electromechanical and hydraulic control, and adopts the auxiliary support device 2 available on the market, which is similar to the locking device of the moving parts of the KOSTYRKA mechanical system, and applies the auxiliary support method to support thin-walled parts and improve the support rigidity of the parts; the device can first extend through the air circuit and contact the workpiece surface with spring force, and then use hydraulic control to lock the support rod of the auxiliary support to achieve the support effect, and the auxiliary support device 2 has a certain range of travel, which can adapt to a certain range of size changes of parts and provide effective support.

[0039] In addition, it can be linked with the fourth axis A-axis of the machine tool for linkage control. The NC code for processing does not change, and it can work automatically with the movement or stop of the A-axis; it also has M code control capability, and can be manually controlled through M code or button switch; the PLC control method linked with the A-axis is applied to realize the automatic operation of the auxiliary support device 2 with the A-axis to avoid collision and interference of parts.

[0040] The specific working principle is: first, use pneumatic extension to extend the output end of the auxiliary support device 2. After the elastic support rod 3 contacts the part, the spring force of its own spring presses against the part; then the hydraulic circuit works to lock the elastic support rod 3 to provide support; when releasing it again, the hydraulic lock is first disconnected, and the pneumatic circuit is closed, so that the elastic support rod 3 can be retracted and separated from the workpiece.

[0041] When the part needs to adjust its position due to processing needs, such as when the A-axis of the four-axis vertical machining center rotates, the tooling obtains the A-axis motion signal or the A-axis brake release signal through the PLC, and releases the elastic support rod 3 in time to prevent the elastic support rod 3 from colliding and interfering with the part; when the part is positioned in the four-axis direction, the auxiliary support device 2 automatically obtains the A-axis stop / brake signal, drives the auxiliary support to work in time, and then performs normal CNC processing.

[0042] A mounting block 4 is installed on the auxiliary support device 2, and a clamping block 5 is integrated at the side end of the mounting block 4. A clamping groove 6 adapted to the clamping block 5 is provided on the inner wall of the fixed shell cover 1, and a protective cover 7 covering the auxiliary support device 2 is installed on the fixed shell cover 1.

[0043] Embodiment 2:

[0044] refer to Figure 5-8 As shown, the elastic support rod 3 includes a support sleeve 31, a support rod 32 and a compression spring 34. Specifically, the support rod 32 is slidably sleeved on the inner side of the support sleeve 31, and a fixing ring 33 is fixedly sleeved on the outer side of the support rod 32. The compression spring 34 is fixed between the fixing ring 33 and the support sleeve 31.

[0045] By cooperating with the support sleeve 31, the support rod 32 and the compression spring 34, the contact force between the support rod 32 and the part is small when they initially contact each other, so as to avoid excessive additional force on the part when supporting the part, which may cause reverse deformation of the part.

[0046] Taking into account the wear on the support rod 32 caused by long-term and frequent contact with parts, as well as the need to support parts of different shapes, the end of the support rod 32 away from the support sleeve 31 is detachably installed with a support head. Specifically, the support head includes a support block 35 and a threaded column 36. The threaded column 36 is fixedly connected to the center of one end of the support block 35, and the end of the support rod 32 away from the support sleeve 31 is provided with a threaded groove 37 that is compatible with the threaded column 36.

[0047] The support block 35 is in direct contact with the parts, and can be directly replaced when wear occurs. In addition, support blocks 35 with different contact surfaces can be replaced according to the support requirements of different parts. The threaded connection method makes the disassembly and assembly operations more convenient and more applicable.

[0048] In order to prevent the support block 35 from loosening, an anti-loosening structure is arranged between the support block 35 and the support rod 32. Specifically, the anti-loosening structure includes a slip ring 38, a limiting wedge block 1 39, a limiting wedge block 2 310 and a compression spring 2 311. The slip ring 38 is slidably sleeved on the outer side of the support rod 32, and the compression spring 2 311 is fixedly connected between the slip ring 38 and the fixed ring 33. The limiting wedge block 1 39 is fixed to the side of the slip ring 38 close to the support block 35. There are multiple limiting wedge blocks 2 310, and the multiple limiting wedge blocks 2 310 are arranged on the end surface of the support block 35 close to the support rod 32 in a circular array with the center of the support block 35, and the gap between two adjacent limiting wedge blocks 2 310 can just accommodate the limiting wedge block 1 39.

[0049] Among them, a limiting slider 313 is integrated on the inner wall of the slip ring 38, and a limiting groove 312 adapted to the limiting slider 313 is provided on the outer wall of the support rod 32. Similarly, a limiting slider 313 is integrated on the side surface of one end of the support rod 32 away from the slip ring 38, and a limiting groove 312 adapted to the limiting slider 313 is provided on the inner wall of the support sleeve 31.

[0050] Through the coordinated arrangement of the slip ring 38, the limit wedge block 1 39, the limit wedge block 2 310 and the compression spring 2 311, when the support block 35 is installed, during the process of the threaded column 36 being screwed into the threaded groove 37, the inclined surface on the limit wedge block 1 39 and the inclined surface on the limit wedge block 2 310 will slide in contact with each other, which will not hinder the rotation of the support block 35. After installation, the support block 35 will not rotate unintentionally under the reverse limiting action of the limit wedge block 2 310 and the limit wedge block 1 39, thereby effectively preventing the support block 35 from loosening and ensuring the stable supporting effect of the support block 35 on the parts.

[0051] Working principle of the utility model: through the coordinated arrangement of the support sleeve 31, the support rod 32 and the compression spring 34, the contact force of the support rod 32 and the part at the initial contact is small, so as to avoid excessive additional force on the part when supporting the part, which may cause the part to deform in reverse; when in use, the support block 35 is in direct contact with the part, and the support block 35 can be directly replaced after wear occurs. In addition, the support blocks 35 with different contact surfaces can be replaced according to the support requirements of different parts. The threaded connection method makes the disassembly and assembly operation more convenient and more applicable; through the slip ring 38 , the matching arrangement of the limit wedge block 1 39, the limit wedge block 2 310 and the compression spring 2 311, when installing the support block 35, in the process of the threaded column 36 being screwed into the threaded groove 37, the inclined surface on the limit wedge block 1 39 slides in contact with the inclined surface on the limit wedge block 2 310, which will not hinder the rotation of the support block 35. After installation, the support block 35 will not rotate unintentionally under the reverse limiting action of the limit wedge block 2 310 and the limit wedge block 1 39, thereby effectively preventing the support block 35 from loosening and ensuring the stable supporting effect of the support block 35 on the parts.

[0052] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An auxiliary support tooling system for CNC machining of cylindrical thin-walled parts, characterized in that: It comprises a fixed shell cover (1) and an auxiliary support mechanism, wherein the auxiliary support mechanism is installed on the inner side of the fixed shell cover (1); The auxiliary support mechanism comprises a plurality of auxiliary support devices (2), and the plurality of auxiliary support devices (2) are symmetrically clamped on the inner side of the fixed shell (1); An elastic supporting rod (3) is installed at the output end of the auxiliary supporting device (2); A support head is detachably mounted on the end of the elastic support rod (3) away from the auxiliary support device (2).

2. The auxiliary support tooling system for CNC machining of cylindrical thin-walled parts according to claim 1, characterized in that: The elastic support rod comprises a support sleeve (31), a support rod (32) and a compression spring (34); The support rod (32) is slidably sleeved on the inner side of the support sleeve (31), a fixing ring (33) is fixedly sleeved on the outer side of the support rod (32), and the compression spring 1 (34) is fixed between the fixing ring (33) and the support sleeve (31); The support head is detachably mounted on the end of the support rod (32) away from the support sleeve (31).

3. The auxiliary support tooling system for CNC machining of cylindrical thin-walled parts according to claim 2, characterized in that: The support head comprises a support block (35) and a threaded column (36), wherein the threaded column (36) is fixedly connected to the center of one end of the support block (35), and a threaded groove (37) adapted to the threaded column (36) is provided at the end of the support rod (32) away from the support sleeve (31).

4. The auxiliary support tooling system for CNC machining of cylindrical thin-walled parts according to claim 3 is characterized in that: An anti-loosening structure is provided between the support block (35) and the support rod (32).

5. The auxiliary support tooling system for CNC machining of cylindrical thin-walled parts according to claim 4, characterized in that: The anti-loosening structure comprises a slip ring (38), a limiting wedge block 1 (39), a limiting wedge block 2 (310) and a compression spring 2 (311); The slip ring (38) is slidably sleeved on the outer side of the support rod (32), the compression spring 2 (311) is fixedly connected between the slip ring (38) and the fixed ring (33), the limiting wedge block 1 (39) is fixed to the side of the slip ring (38) close to the support block (35), a plurality of limiting wedge blocks 2 (310) are provided, and the plurality of limiting wedge blocks 2 (310) are arranged in a circular array with the center of the support block (35) on the end surface of the support block (35) close to the support rod (32), and the gap between two adjacent limiting wedge blocks 2 (310) can just accommodate the limiting wedge block 1 (39).

6. The auxiliary support tooling system for CNC machining of cylindrical thin-walled parts according to claim 5, characterized in that: The inner wall of the slip ring (38) is integrally provided with a limit slide block (313), and the outer wall of the support rod (32) is provided with a limit slide groove (312) adapted to the limit slide block (313); Similarly, a limiting slider (313) is integrally provided on the side surface of one end of the support rod (32) away from the slip ring (38), and a limiting sliding groove (312) adapted to the limiting slider (313) is provided on the inner wall of the support sleeve (31).

7. The auxiliary support tooling system for CNC machining of cylindrical thin-walled parts according to claim 1, characterized in that: The auxiliary support device (2) is mounted with a mounting block (4), a clamping block (5) is integrally provided on the side end of the mounting block (4), a clamping groove (6) adapted to the clamping block (5) is provided on the inner wall of the fixed shell cover (1), and a protective cover (7) covering the auxiliary support device (2) is mounted on the fixed shell cover (1).

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