Plasma cutting machine for automobile part machining

Abstract

The invention relates to the technical field of plasma cutting, and discloses an automobile part machining plasma cutting machine which comprises a portal frame, a driving piece is arranged at the end of the portal frame, and the driving piece is movably connected with a moving screw and a cutting screw. The rotating speed ratio of the cutting screw rod to the moving screw rod is the same as the tooth pitch ratio of the moving screw rod to the cutting screw rod, the moving box is fixedly connected with a connecting block, the connecting block is provided with a switching assembly, and the switching assembly can switch the connecting mode into transmission connection of the moving screw rod and the connecting block or transmission connection of the cutting screw rod and the connecting block. According to the plasma cutting machine for machining the automobile parts, the movable screw is used for driving the connecting block and the movable box to move during rapid movement, the cutting screw is used for driving the movable box and the connecting block during precise cutting, precise movement and rapid movement are both considered, and due to the fact that loads are mainly borne by the movable screw during movement, the machining efficiency is improved. Abrasion and deformation of the cutting screw can be effectively reduced.

Description

Technical Field

[0001] The present application relates to the field of plasma cutting technology, and in particular to a plasma cutting machine for processing automobile parts. Background Art

[0002] Plasma cutting has the advantages of high precision, fast speed and high quality. Some automotive parts are cut using plasma cutting machines during production and processing.

[0003] Screw drive is a common way to drive the plasma cutting machine body to move along the cutting bed in the market. Generally speaking, the smaller the screw pitch, the higher the moving accuracy of the cutting machine, but it will also make the cutting machine move slower. However, the size of automobile parts is relatively large, and the distance the cutting machine moves is large during cutting. At the same time, the cutting accuracy of automobile parts is required to be high, so it takes a long time to move to the next cutting position after each cutting, which affects the cutting efficiency.

[0004] Secondly, the mass of the cutting host is relatively large, and the force between the screw and the cutting host is relatively large. When the cutting host moves, the screw will also wear, thereby affecting the cutting accuracy. Summary of the invention

[0005] The present application proposes a plasma cutting machine for automobile parts processing, which uses a moving screw to drive the connecting block and the moving box to move during rapid movement, and uses a cutting screw to drive the moving box and the connecting block during precise cutting, taking into account both precise movement and rapid movement to ensure processing accuracy and work efficiency.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: A plasma cutting machine for processing automobile parts, comprising a gantry, a cutting table is provided below the gantry, the gantry is movably connected to a moving box, the moving box is fixedly connected to a cutting main machine, a driving member is provided at the end of the gantry, the driving member is movably connected to a moving screw and a cutting screw, the speed ratio of the cutting screw to the moving screw is the same as the pitch ratio of the moving screw and the cutting screw, the moving box is fixedly connected to a connecting block, a switching assembly is provided on the connecting block, the moving screw and the cutting screw are connected to the moving box through the connecting block, and the switching assembly can switch the connection mode to a transmission connection between the moving screw and the connecting block or a transmission connection between the cutting screw and the connecting block. When rapid movement is required, it is switched to a transmission connection between the moving screw and the connecting block, and when precise movement is required, it is switched to a transmission connection between the cutting screw and the connecting block.

[0007] Furthermore, a sliding structure is provided at the bottom of the moving box, and the moving box slides on the upper surface of the gantry. The connecting block is provided on the sides of the moving box and the gantry. The cutting screw and the moving screw are provided on the sides of the gantry. The gantry directly bears the weight of the moving box, and the moving screw and the cutting screw are only used to drive the connecting block and the moving box to move.

[0008] Furthermore, the switching assembly includes a switching card block and two groups of driving blocks, the two groups of driving blocks are respectively threadedly connected to the moving screw and the cutting screw, the switching card block includes a moving plate, and two groups of "concave" shaped card blocks are provided on the switching card block. The driving block can be inserted into the card block, and the driving block drives the connecting block to move through the switching card block. The concave surfaces of the two card blocks are opposite to each other and are respectively located on both sides of the two driving blocks. The moving plate is connected to the switching screw, and the switching screw is connected to the switching motor.

[0009] Furthermore, the driving block is provided with inclined surfaces on both sides relative to the card block surface, and the two inclined surfaces are symmetrical. The two sides of the card block are symmetrical. When the card block is switched to move up and down, the card block interacts with the inclined surfaces to keep the position consistent.

[0010] Furthermore, the thread of the movable screw is arranged in sections, and a smooth section is provided between two sections of the thread. Guard plates are provided on both sides of the connecting block relative to the driving block, and an elastic sleeve is provided between the guard plate and the driving block.

[0011] Furthermore, a pressure sensor is provided between the driving block corresponding to the moving screw and the guard plate. The pressure sensor monitors the elastic force change of the elastic sleeve, measures the actual distance between the two smooth sections and enters it into the control system. When the pressure monitored by the pressure sensor suddenly increases or decreases, it is judged that the smooth section is entered. When moving precisely, the moment of entering the smooth section is recorded, and the moment of entering the smooth section is used to verify whether the driving block moves precisely.

[0012] Furthermore, a stabilizing block is provided on the surface of the driving block, and a stabilizing groove is provided on the gantry at a position corresponding to the stabilizing block, and the stabilizing block slides in the stabilizing groove.

[0013] Furthermore, the movable plate has three stop positions. When the movable plate stops at the middle position, the clamping block neither clamps the driving block connected to the movable screw nor the driving block connected to the cutting screw. When the movement stops or the emergency stop is triggered, the movable plate moves to the middle position.

[0014] The beneficial effects of the present invention are as follows:

[0015] The present application provides a plasma cutting machine for automobile parts processing. During rapid movement, a moving screw is used to drive the connecting block and the moving box to move. During precise cutting, a cutting screw is used to drive the moving box and the connecting block. Both precise movement and rapid movement are taken into consideration to ensure processing accuracy and work efficiency. Furthermore, the driving mode is switched by a card block, and positioning is automatically achieved during the switching process. Rapid movement and precise movement can be directly connected and switched at will, which further ensures processing accuracy and improves work efficiency.

[0016] Since the load during movement is mainly borne by the moving screw, the cutting screw remains unloaded most of the time, which can effectively reduce the wear and deformation of the cutting screw and ensure cutting accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work:

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 is a schematic diagram of a switching component in the present invention;

[0020] Figure 3 It is a schematic diagram of the switching card block in the present invention;

[0021] Figure 4 A top view of the switching card block in the present invention;

[0022] Figure 5 It is a schematic diagram of the moving screw in the present invention.

[0023] In the figure: 1. gantry; 2. cutting table; 3. moving box; 4. connecting block; 5. cutting host; 6. moving screw; 7. cutting screw; 8. driving member; 9. switching assembly; 91. guard plate; 92. driving block; 93. switching card block; 931. moving plate; 932. card block; 933. switching screw; 934. tightening block; 94. elastic sleeve; 95. stabilizing block; 10. pressure sensor; 11. stabilizing groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] For example, see Figure 1-Figure 3 A plasma cutting machine for processing automobile parts comprises a gantry 1, a driving device is connected to the bottom of the gantry 1, the gantry 1 moves along the X-axis, a cutting table 2 is arranged below the gantry 1, a workpiece to be cut is placed on the cutting table 2 directly or after being fixed by a clamp, a moving box 3 is movably connected to the gantry 1, a cutting main machine 5 is fixedly connected to the moving box 3, the moving box 3 moves along the gantry 1 (Y-axis) with the cutting main machine 5, a driving member 8 is arranged at the end of the gantry 1, a moving screw 6 and a cutting screw 7 are movably connected to the driving member 8, the moving screw 6 has a larger pitch and lower precision than the cutting screw 7, the moving screw 6 is used to drive the moving box 3 to move quickly, and the cutting screw 7 drives the moving box 3 to move quickly. The moving box 3 moves precisely, the speed ratio of the cutting screw 7 and the moving screw 6 is the same as the pitch ratio of the moving screw 6 and the cutting screw 7, the driving member 8 drives the moving screw 6 and the cutting screw 7 to rotate, the cutting screw 7 and the moving screw 6 are connected by gear transmission, so that the speed ratio of the two is maintained at a specific ratio, the moving box 3 is fixedly connected with a connecting block 4, the connecting block 4 is provided with a clamp, the clamp fixes the cutting head, the clamp can move up and down with the cutting head, the connecting block 4 is provided with a switching component 9, the moving screw 6 and the cutting screw 7 are connected to the moving box 3 through the connecting block 4, and the switching component 9 can switch the connection mode to a transmission connection between the moving screw 6 and the connecting block 4 or a transmission connection between the cutting screw 7 and the connecting block 4. When fast movement is required, the transmission connection between the moving screw 6 and the connecting block 4 is switched. At this time, the load is borne by the moving screw 6, and the cutting screw 7 still bears the metering function. The load of the cutting screw 7 is light and the wear is small. When precise movement is required, the transmission connection between the cutting screw 7 and the connecting block 4 is switched. At this time, although the load is mainly borne by the cutting screw 7, since the movement of the moving box 3 is relatively slow during cutting, the impact on the cutting screw 7 is still relatively small, thereby improving the service life of the cutting screw 7.

[0026] A sliding structure is provided at the bottom of the moving box 3, and the moving box 3 slides on the upper surface of the gantry 1. The connecting block 4 is provided on the sides of the moving box 3 and the gantry 1. The cutting screw 7 and the moving screw 6 are provided on the sides of the gantry 1. The gantry 1 directly bears the weight of the moving box 3, and the moving screw 6 and the cutting screw 7 are only used to drive the connecting block 4 and the moving box 3 to move.

[0027] The switching assembly 9 includes a switching card block 93 and two groups of driving blocks 92. The two groups of driving blocks 92 are respectively connected to the moving screw 6 and the cutting screw 7 in a transmission manner. The moving screw 6 and the cutting screw 7 are threadedly connected to the driving block 92. The switching card block 93 includes a moving plate 931. The moving plate 931 is provided with two groups of "concave"-shaped card blocks 932. The driving block 92 can be inserted into the card blocks 932. The concave surfaces of the two card blocks 932 are opposite and are respectively located on both sides of the two driving blocks 92. The switching card block 93 is slidably connected to the connecting block 4. The moving plate 931 is connected to a switching screw 933. The switching screw 933 is connected to a switching motor. The switching screw 933 can also be replaced by a cylinder or an electromagnet. When the moving plate 93 When sliding downward, the block 932 clamps the driving block 92 connected to the moving screw 6, and the other driving block 92 can move freely. When the moving plate 931 moves upward, the block 932 clamps the driving block 92 connected to the cutting screw 7. The connection mode is switched by the movement of the moving plate 931. Due to the different precisions of the moving screw 6 and the cutting screw 7, when the moving screw 6 and the cutting screw 7 drive the two driving blocks 92 to move, the two driving blocks 92 may not be synchronized, which will affect the normal movement of the connecting block 4, so that the switching block 93 only clamps one driving block 92, and the other driving block 92 can move freely, which can adapt to the different precisions of the moving screw 6 and the cutting screw 7.

[0028] See also Figure 4 In order to ensure that the relative positions of the connecting block 4 and the driving block 92 remain consistent after the card block 932 clamps the driving block 92, thereby ensuring the movement accuracy of the moving box 3 and the connecting block 4, inclined surfaces are provided on both sides of the driving block 92 relative to the card block 932. The two inclined surfaces are symmetrical, and the two sides of the card block 932 are symmetrical. When the card block 93 is switched to move up and down, the card block 932 interacts with the inclined surface to automatically adjust the position so that the driving block 92 is always in the center position.

[0029] See also Figure 2 and Figure 5 Since the manufacturing precision requirement of the moving screw 6 is low, the pitch of the moving screw 6 may be larger or smaller than the pitch of the cutting screw 7. After the deviation accumulates, the relative positions of the two driving blocks 92 will deviate greatly. The thread of the moving screw 6 is arranged in sections, and the two sections of the thread are smooth. The driving block 92 can slide freely between the two sections of the thread. The connecting block 4 is provided with guard plates 91 on both sides relative to the driving block 92, and an elastic sleeve 94 is provided between the guard plate 91 and the driving block 92. When the moving screw 6 drives the connecting block 4 to move, if the pitch of the moving screw 6 is larger or smaller, the driving block 92 corresponding to the cutting screw 7 will deviate to one side and squeeze the elastic sleeve 94. When the driving block 92 moves to the smooth position, the connecting block 4 adjusts its position under the action of the spring, so that the driving block 92 corresponding to the cutting screw 7 is reset to eliminate the accumulated error. When the cutting screw 7 is driven, the adjustment process is the same.

[0030] A pressure sensor 10 is provided between the driving block 92 corresponding to the moving screw 6 and the guard plate 91. The pressure sensor 10 monitors the elastic force change of the elastic sleeve 94 and measures the actual distance between the two smooth sections when in use. Each time the driving block 92 moves to the smooth section, the pressure monitored by the pressure sensor 10 will suddenly increase or decrease. The actual movement amount of the driving block 92 and the moving box 3 is judged by the moment when the driving block 92 passes through the smooth section, and the movement of the moving box 3 is verified.

[0031] In order to make the driving block 92 move more smoothly, a stabilizing block 95 is provided on the surface of the driving block 92 , and a stabilizing groove 11 is provided at a position of the gantry 1 corresponding to the stabilizing block 95 , and the stabilizing block 95 slides in the stabilizing groove 11 .

[0032] In the event of a sudden stop, a large impact force may be generated on the moving screw 6 or the cutting screw 7. The moving plate 931 has three stop positions. When the moving plate 931 stops at the middle position, the clamping block 932 neither clamps the driving block 92 connected to the moving screw 6 nor the driving block 92 connected to the cutting screw 7. When the movement stops or the emergency stop is triggered, the moving plate 931 moves to the middle position. At this time, the connecting block 4 and the moving box 3 can move relative to the moving screw 6 and the cutting screw 7, and the moving screw 6 and the cutting screw 7 will not be impacted.

[0033] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A plasma cutting machine for automobile parts processing, comprising a gantry (1), a cutting table (2) is arranged below the gantry (1), the gantry (1) is movably connected to a moving box (3), and the moving box (3) is fixedly connected to a cutting main machine (5), characterized in that: The end of the gantry (1) is provided with a driving member (8), the driving member (8) being movably connected with a moving screw (6) and a cutting screw (7), the speed ratio of the cutting screw (7) to the moving screw (6) being the same as the pitch ratio of the moving screw (6) to the cutting screw (7), the moving box (3) being fixedly connected with a connecting block (4), the connecting block (4) being provided with a switching assembly (9), the moving screw (6) and the cutting screw (7) being connected to the moving box (3) via the connecting block (4), the switching assembly (9) being able to switch the connection mode to a transmission connection between the moving screw (6) and the connecting block (4) or a transmission connection between the cutting screw (7) and the connecting block (4); when rapid movement is required, the connection mode is switched to a transmission connection between the moving screw (6) and the connecting block (4), and when precise movement is required, the connection mode is switched to a transmission connection between the cutting screw (7) and the connecting block (4).

2. A plasma cutting machine for automobile parts processing according to claim 1, characterized in that: The bottom of the moving box (3) is provided with a sliding structure, the moving box (3) slides on the upper surface of the gantry (1), the connecting block (4) is arranged on the side of the moving box (3) and the gantry (1), and the cutting screw (7) and the moving screw (6) are arranged on the side of the gantry (1).

3. The plasma cutting machine for automobile parts processing according to claim 1, characterized in that: The switching assembly (9) comprises a switching card block (93) and two groups of driving blocks (92). The two groups of driving blocks (92) are respectively threadedly connected to the moving screw (6) and the cutting screw (7). The switching card block (93) comprises a moving plate (931). The moving plate (931) is provided with two groups of "concave"-shaped card blocks (932). The driving block (92) can be inserted into the card blocks (932). The driving block (92) drives the connecting block (4) to move through the switching card block (93). The concave surfaces of the two card blocks (932) are opposite and are respectively located on the two sides of the two driving blocks (92). The moving plate (931) is connected to the switching screw (933), and the switching screw (933) is connected to the switching motor.

4. The plasma cutting machine for automobile parts processing according to claim 3, characterized in that: Inclined surfaces are provided on both sides of the driving block (92) relative to the clamping block (932), and the two inclined surfaces are symmetrical, and the two sides of the clamping block (932) are symmetrical.

5. The plasma cutting machine for automobile parts processing according to claim 4, characterized in that: The thread of the movable screw rod (6) is arranged in sections, and a smooth section is provided between two sections of the thread. The connecting block (4) is provided with guard plates (91) on both sides relative to the driving block (92), and an elastic sleeve (94) is provided between the guard plates (91) and the driving block (92).

6. The plasma cutting machine for automobile parts processing according to claim 4, characterized in that: A pressure sensor (10) is provided between the driving block (92) corresponding to the moving screw (6) and the guard plate (91). The pressure sensor (10) monitors the change in the elastic force of the elastic sleeve (94), measures the actual distance between the two smooth sections and enters the information into the control system. When the pressure monitored by the pressure sensor (10) suddenly increases or decreases, it is determined that the smooth section has been entered. When the movement is precise, the moment of entering the smooth section is recorded, and the moment of entering the smooth section is used to verify whether the driving block (92) has moved precisely.

7. The plasma cutting machine for automobile parts processing according to claim 4, characterized in that: A stabilizing block (95) is provided on the surface of the driving block (92), and a stabilizing groove (11) is provided on the gantry (1) at a position corresponding to the stabilizing block (95), and the stabilizing block (95) slides in the stabilizing groove (11).

8. The plasma cutting machine for automobile parts processing according to claim 4, characterized in that: The movable plate (931) has three stop positions. When the movable plate (931) stops at the middle position, the clamping block (932) neither clamps the driving block (92) connected to the movable screw (6) nor clamps the driving block (92) connected to the cutting screw (7). When the movement stops or the emergency stop is triggered, the movable plate (931) moves to the middle position.

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