A four-axis multi-station CNC machine tool

Abstract

The present invention provides a four-axis multi-station CNC machine tool, including a machine tool body and a first motor, wherein the machine tool body is provided with slide rails symmetrically arranged on the left and right, and a slide table is provided on the slide rails for sliding forward and backward movement, a screw is keyed to the output shaft of the first motor and is screwed to the slide table, a turntable driven by a second motor is provided on the slide table, a positioning plate is provided on the turntable, a material clamping assembly is provided on the positioning plate, a longitudinal moving part driven by a servo electric cylinder is provided on the machine tool body, an oblique moving assembly that slides on the slide rail is elastically pre-loaded on the longitudinal moving part, and a material rack assembly is provided on the oblique moving assembly. The advantages of the present invention are that the pre-installation of the workpiece can be completed during processing, and the workpiece on the positioning plate can be automatically loosened and clamped, and the workpiece on the material rack assembly can be tilted and moved back to the positioning plate, and then the material rack assembly is loosened, thereby improving efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of CNC machine tools, in particular to a four-axis multi-station CNC machine tool. Background Art

[0002] A CNC machine tool, short for digitally controlled machine tool, is an automated machine tool equipped with a program control system. This control system logically processes programs specified by control codes or other symbolic instructions, decodes them, and represents them as coded numbers. This information is then input into the CNC device via an information carrier. After processing, the CNC device issues various control signals to control the machine's movements, automatically producing parts according to the shapes and dimensions specified in the drawings. After each part is processed on an existing four-axis multi-station CNC machine tool, a motor drives the slide forward to the loading position, bringing the workpiece on the slide fixture close to the window. The workpiece automatically falls out of the fixture once it is released. The operator then places the parts to be processed one by one into the positioning slots of the positioning plate. The slide then moves back to the processing position, where the fixture clamps the workpiece. Due to the large number of workstations, loading workpieces one by one wastes considerable time and is inefficient. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a four-axis multi-station CNC machine tool, which can complete the pre-installation of workpieces during processing, and can automatically loosen and clamp the workpiece on the positioning plate, so that the workpiece on the rack assembly is tilted and moved to the positioning plate, and then the rack assembly is loosened, thereby improving efficiency.

[0004] The present invention provides a four-axis multi-station CNC machine tool, including a machine tool body 1 and a first motor 4, wherein the machine tool body 1 is provided with a slide rail 2 symmetrically arranged on the left and right, and a slide table 3 is slidably arranged on the slide rail 2 for forward and backward movement, a screw 5 is keyed to the output shaft of the first motor 4 and is screwed to the slide table 3, a turntable driven by a second motor 6 is provided on the slide table 3, a positioning plate 7 is provided on the turntable, a clamping assembly 8 is provided on the positioning plate 7, a longitudinal moving part 10 driven by a servo electric cylinder 9 is provided on the machine tool body 1, and an inclined member 8 is elastically pre-loaded and slidably fitted on the slide rail 2 is provided on the longitudinal moving part 10 The inclined moving assembly is provided with a material rack assembly 15, and a stabilizing block 16 for resisting the inclined moving assembly is installed on the slide rail 2. When the longitudinal moving member 10 moves backward, the clamping assembly 8 that moves forward with the slide 3 contacts the longitudinal moving member 10 and releases the workpiece. The longitudinal moving member 10 drives the material rack assembly 15 to tilt and move backward through the inclined moving assembly. The inclined moving assembly does not move after resisting the stabilizing block. The longitudinal moving member 10 drives the material rack assembly 15 to release the workpiece that falls on the positioning plate 7, and the clamping assembly 8 that moves backward with the slide 3 disengages from the longitudinal moving member 10 and clamps the workpiece.

[0005] Furthermore, the longitudinal moving member 10 is composed of a lower vertical plate 10.1 connected to an upper stop block 10.3. Guide holes 10.2 are symmetrically provided on the left and right sides of the vertical plate 10.1. An oblique concave block 10.4 is provided on the upper end of the stop block 10.3.

[0006] Furthermore, the clamping assembly 8 includes two sliding rods 8.2 that are symmetrically arranged on the left and right and slide vertically on the positioning plate 7. Each sliding rod 8.2 is provided with a clamping block 8.1. A connecting piece 8.3 is provided between the bottoms of the two sliding rods 8.2. A resist column that cooperates with the resist block 10.3 is provided in the middle of the connecting piece 8.3. The outer sleeve of the sliding rod 8.2 is provided with a first elastic piece connecting the connecting piece 8.3 and the positioning plate 7. The sliding rod 8.2 is provided with a first limiting column 8.4 that abuts against the positioning plate 7.

[0007] Furthermore, the oblique movement assembly includes a slide 11 that is slidably fitted on the slide rail 2 for forward and backward movement, and guide rods 12 are symmetrically provided on the left and right sides of the front end of the slide 11. The guide rods 12 are slidably fitted on the guide holes 10.2 for forward and backward movement. The outer sleeve of the guide rod 12 is provided with a second elastic member arranged between the slide 11 and the vertical plate 10.1, and the end of the guide rod 12 is installed with a second limiting column that abuts against the vertical plate 10.1. Telescopic columns 13 are symmetrically provided on the left and right sides of the upper end of the slide 11 and are slidably fitted up and down, and inclined slides 14 are symmetrically provided on the left and right sides of the machine tool body 1, and the side walls of the telescopic columns 13 are longitudinally provided with sliding columns that are slidably fitted on the inclined slides 14.

[0008] Furthermore, a material receiving box 17 is obliquely provided on the slide 11 .

[0009] Furthermore, the material rack assembly 15 includes an inclined block 15.1 connected between the two telescopic columns 13, and the inclined block 15.1 is elastically slidably and vertically provided with a left frame member 15.2 and a right frame member 15.3 arranged opposite to each other. The bottoms of the left frame member 15.2 and the right frame member 15.3 are both provided with guide columns, and the inclined concave block 10.4 can drive the two guide columns together to loosen the workpiece.

[0010] Furthermore, the inclined slideway 14 and the inclined block 15.1 have the same inclination angle.

[0011] Furthermore, a sliding groove is vertically opened on the tilting block 15.1 for accommodating the left frame 15.2 and the right frame 15.3 to slide left and right, and a mounting block 15.5 is installed on the side wall of the sliding groove. A telescopic rod 5.4 is laterally provided on the mounting block 15.5 and elastically retracted to the left frame 15.2 and the right frame 15.3.

[0012] Furthermore, the left frame member 15.2 and the right frame member 15.3 are both composed of two interconnected frame blocks.

[0013] Furthermore, a dust collection box 18 is provided at the bottom of the tool holder of the machine tool body 1 .

[0014] The advantages of the present invention are that: the pre-installation of the workpiece can be completed during processing, and the workpiece on the positioning plate can be automatically loosened and clamped, so that the workpiece on the rack assembly can be tilted and moved back to the positioning plate, and the rack assembly can be loosened to improve efficiency; the dust collection box can absorb the flying dust generated during processing; the stop block can loosen the workpiece with the forward moving clamping assembly, and the backward moving stop block can keep the clamping assembly loose, and the vertical plate can push the slide to move back to the bottom, so that the workpiece on the rack assembly can be tilted and moved back and falls onto the positioning plate, and the oblique concave block can drive the guide posts of the two rack parts to come together to loosen the workpiece; the first limit post can play the role of elastic pre-compression, so that the clamping block can firmly clamp the workpiece through the first elastic part; the servo electric cylinder drives the longitudinal moving part to move back while the clamping assembly moves forward with the slide, and after the stop column contacts the stop block, the slide rod, connecting part, and clamping block are lifted up to loosen the workpiece, and the slide moves back to reset, and after the stop column disengages from the stop block, the connecting part, and slide When the second limit post is driven by the second elastic member, the vertical plate pushes the slide backward together with it through the second elastic member; when the longitudinal moving member moves backward, the vertical plate pushes the slide backward through the pre-pressed second elastic member, and the material rack assembly tilts and moves backward through the sliding column sliding on the inclined slide, the slide does not move after it hits the stable block, and the material rack assembly does not move, and the workpiece on the material rack assembly falls into the positioning groove of the positioning plate, and the longitudinal moving member continues to move backward, and the oblique groove on the oblique concave block contacts and drives the two guide posts together, and the two guide posts drive the left frame member to move left and the right frame member to move right, and the left frame member and the right frame member are separated from the workpiece, so that the slide can move backward with the workpiece; when the oblique concave block drives the two guide posts together to release the workpiece, it can simultaneously drive the two sets of frame blocks to release the workpiece; the workpiece released by the clamping block can automatically fall into the receiving box and slide to the bottom of the receiving box so that the staff can take the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A perspective view of the present invention;

[0016] Figure 2 It is a structural schematic diagram of the present invention;

[0017] Figure 3 It is the front view of the present invention;

[0018] Figure 4 A top view of the present invention;

[0019] Figure 5 for Figure 3 AA cross-sectional view;

[0020] Figure 6This is a schematic diagram of the structure of the present invention when the workpiece is pre-assembled;

[0021] Figure 7 This is a cross-sectional view of the present invention when the stop block lifts up the stop column and the workpiece falls;

[0022] Figure 8 This is a cross-sectional view of the present invention when the positioning plate and the material clamping assembly rotate and the positioning groove of the positioning plate is tilted upward;

[0023] Figure 9 It is a cross-sectional view of the present invention when the slide seat abuts against the stabilizing block and the workpiece on the rack block falls into the positioning plate;

[0024] Figure 10 This is a cross-sectional view of the present invention when the inclined concave block drives the two guide pins to move closer to release the workpiece;

[0025] Figure 11 It is a cross-sectional view of the present invention when the slide moves backward and the stop column is separated from the stop block to automatically clamp the workpiece;

[0026] Figure 12 for Figure 1 A magnified view of part B;

[0027] Figure 13 for Figure 4 Magnified view of part C;

[0028] Figure 14 It is a structural schematic diagram of the longitudinal moving member of the present invention;

[0029] Figure 15 It is a structural schematic diagram of the right frame member of the present invention. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] See Figures 1 to 15The present invention provides a four-axis multi-station CNC machine tool, which includes a machine tool body 1 and a first motor 4. The two axes are for the left and right and up and down movement of the tool holder of the machine tool body, one axis is for the front and back movement of the slide, and one axis is for the rotation of the turntable. A dust collection box 18 is provided at the bottom of the tool holder of the machine tool body 1. The dust collection box is connected to the dust collection device through a hose. The dust collection hole on the dust collection box faces the processing tool on the tool holder to suck away the flying dust generated during processing. The machine tool body 1 is symmetrically provided with slide rails 2. The slide rails 2 are slidably provided for moving forward and backward. A slide 3 is provided for sliding on the slide rails 2. A screw 5 screwed to the slide 3 is keyed to the output shaft of the first motor 4. A turntable driven by the second motor 6 is provided on the slide 3. The first motor and the second motor are both servo motors. A positioning plate 7 is provided on the turntable. A clamping assembly 8 is provided on the plate 7, a longitudinal moving part 10 driven by a servo electric cylinder 9 is provided on the machine tool body 1, a bracket installed on the machine tool body is provided at the bottom of the servo electric cylinder, and an oblique moving assembly sliding on the slide rail 2 is elastically pre-stressed on the longitudinal moving part 10, a material racking assembly 15 is provided on the oblique moving assembly, and a stabilizing block 16 for supporting the oblique moving assembly is installed on the slide rail 2. When the longitudinal moving part 10 moves backward, the clamping assembly 8 that moves forward with the slide 3 contacts the longitudinal moving part 10 and releases the workpiece, and the longitudinal moving part 10 drives the material racking assembly 15 to tilt and move backward through the oblique moving assembly, and the oblique moving assembly does not move after it resists the stabilizing block, and the longitudinal moving part 10 drives the material racking assembly 15 to release the workpiece that falls on the positioning plate 7, and the clamping assembly 8 that moves backward with the slide 3 disengages from the longitudinal moving part 10 and clamps the workpiece. The workpiece falls into the positioning groove of the positioning plate, and the longitudinal moving part that continues to move backward drives the rack assembly to release the workpiece that falls on the positioning plate, and the slide moves backward and resets. At this time, the workpiece is tilted upward and will not fall, and the clamping assembly that moves with the slide backward will automatically clamp the workpiece after disengaging from the longitudinal moving part.

[0032] See Figure 1 、 Figure 2 、 Figure 14The longitudinal moving member 10 consists of a vertical plate 10.1 at the bottom, connected to a stop block 10.3 at the top. Guide holes 10.2 are symmetrically arranged on the left and right sides of the vertical plate 10.1, and a slanted recess 10.4 is located at the top of the stop block 10.3. The stop block allows the forward-moving clamping assembly to release the workpiece, while the backward-moving stop block keeps the clamping assembly released. The vertical plate pushes the slide backward to the bottom (the slide rests on the stabilizing block and remains stationary), causing the workpiece on the rack assembly to tilt backward and fall onto the positioning plate. The slanted recess drives the guide posts of the two rack components together to release the workpiece.

[0033] The clamping assembly 8 includes two sliding rods 8.2 which are symmetrically arranged on the left and right and slide vertically on the positioning plate 7. A clamping block 8.1 is provided on each sliding rod 8.2. A connecting piece 8.3 is provided between the bottoms of the two sliding rods 8.2. A resist column which cooperates with the resist block 10.3 is provided in the middle of the connecting piece 8.3. The outer sleeve of the sliding rod 8.2 is provided with a first elastic piece connecting the connecting piece 8.3 and the positioning plate 7. A first limiting column 8.4 which abuts against the positioning plate 7 is provided on the sliding rod 8.2. The first limiting column can play the role of elastic pre-compression, so that the clamping block can firmly clamp the workpiece through the first elastic piece. The servo electric cylinder drives the longitudinal moving part to move backward while the clamping assembly moves forward with the slide. After the column contacts the block, the slide rod, connecting part, and clamping block are lifted to release the workpiece. The longitudinal moving part stops and the second motor drives the positioning plate and the clamping assembly to rotate through the turntable. The positioning groove of the positioning plate is tilted downward, and the workpiece can fall automatically. Then the second motor drives the positioning plate and the clamping assembly to reverse through the turntable, and the positioning groove of the positioning plate is tilted upward. Then the backward longitudinal moving part drives the material rack assembly to move backward to the bottom with the workpiece, and the workpiece falls into the positioning groove of the positioning plate. The oblique concave block that continues to move backward releases the material rack assembly and the workpiece falls on the positioning plate. The slide moves backward and resets, and the workpiece tilts upward and will not fall. After the column disengages from the block, the connecting part, slide rod, and clamping block elastically reset under the action of the first elastic member, and the clamping block automatically clamps the workpiece.

[0034] The oblique movement assembly includes a slide 11 that is slidably fitted on the slide rail 2 for forward and backward movement, and guide rods 12 are symmetrically provided on the left and right sides of the front end of the slide 11. The guide rods 12 are slidably fitted on the guide holes 10.2 for forward and backward movement. The outer sleeve of the guide rod 12 is provided with a second elastic member arranged between the slide 11 and the vertical plate 10.1, and the end of the guide rod 12 is installed with a second limit column that abuts against the vertical plate 10.1. Telescopic columns 13 are symmetrically provided on the left and right sides of the upper end of the slide 11 and slide up and down, and inclined slides 14 are symmetrically provided on the left and right sides of the machine tool body 1. The side walls of the telescopic columns 13 are longitudinally provided with sliding columns that slide on the inclined slides 14. The lower end surface of the block fits with the upper end surface of the slide, and the block is supported by the slide. The second limit column can play the role of elastic preload. The vertical plate causes the slide to move backward together with it through the second elastic member. When the longitudinal moving member moves backward, the vertical plate pushes the slide backward through the preloaded second elastic member, and the material rack assembly tilts and moves backward through the sliding column that slides on the inclined slide (the telescopic column retracts downward on the slide). After the slide rests on the stabilizing block, it does not move. At the same time, the material rack assembly does not move. The workpiece on the material rack assembly falls into the positioning groove of the positioning plate. The longitudinal moving member continues to move backward, and the oblique groove on the oblique concave block contacts and drives the two guide columns together to release the workpiece.

[0035] The material holding assembly 15 includes an inclined block 15.1 connected between the two telescopic columns 13. The inclined block 15.1 is elastically and vertically provided with a left frame member 15.2 and a right frame member 15.3 disposed opposite each other. Guide posts are provided at the bottom of each of the left and right frames 15.2 and 15.3. The inclined concave block 10.4 is capable of driving the two guide posts together to release the workpiece. As the longitudinal moving member continues to move backward, the inclined grooves on the inclined concave block contact and drive the two guide posts together. The two guide posts drive the left frame member to the left and the right frame member to the right, disengaging the left and right frames from the workpiece, allowing the slide to move backward with the workpiece. The material clamping assembly automatically clamps the workpiece after disengaging the stop block. The longitudinal moving member then moves forward to reset. After the inclined concave block is released from the guide posts, the left and right frames are elastically reset.

[0036] The inclined slide 14 and the inclined block 15.1 have the same inclination angle. The workpiece supported by the left and right brackets has the same inclination angle as the inclined block, and the inclined slide and the workpiece have the same inclination angle. The second motor can drive the positioning plate to rotate via the turntable so that the inclination angle of the positioning plate's positioning slot is consistent with the inclination angle of the workpiece, allowing the workpiece to fall smoothly into the positioning plate's positioning slot.

[0037] See Figure 12 、 Figure 13 A vertical slot is defined on the tilting block 15.1, allowing the left and right frame members 15.2 and 15.3 to slide sideways. Mounting blocks 15.5 are mounted on the sidewalls of the slots. Mounting blocks 15.5 are laterally mounted on the telescopic rod 5.4, which elastically extends between the left and right frame members 15.2 and 15.3. A third elastic member is positioned on the outer surface of the telescopic rod, connecting the mounting block and the frame members to enable the frame members to slide sideways.

[0038] The left frame member 15.2 and the right frame member 15.3 are each composed of two interconnected frame blocks. Each frame block has an arc-shaped frame slot that fits the workpiece. When the inclined concave block drives the two guide posts together to release the workpiece, it can simultaneously drive the two sets of frame blocks to release the workpiece. When the inclined concave block is separated from the guide posts, the two sets of frame blocks automatically reset under the action of a third elastic member.

[0039] A material receiving box 17 is obliquely provided on the slide 11. The workpiece of the clamping block unclamping can automatically fall into the material receiving box and slide to the bottom of the material receiving box, so that the staff can take the workpiece.

[0040] The specific working process of the present invention is as follows: when processing the workpiece on the positioning plate, the staff can put the workpiece between the two blocks, and the workpiece will not fall when tilted upwards, thus completing the pre-installation of the workpiece. Figure 6 As shown, the servo electric cylinder drives the longitudinal moving part to move backward while the first motor drives the slide forward through the screw, and the vertical plate moves the slide backward together with it through the second elastic member. The two are close to each other at the same time to improve efficiency. The positioning plate, clamping assembly and processed workpiece move forward with the slide. After the stop column contacts the stop block, the slide rod, connecting piece and clamping block are lifted to release the workpiece. The longitudinal moving part stops and the second motor drives the positioning plate and clamping assembly to rotate through the turntable. The positioning slot of the positioning plate is tilted downward, and the workpiece can fall automatically. Figure 7 As shown, the second motor then drives the positioning plate and the clamping assembly to reverse through the turntable, and the positioning slot of the positioning plate tilts upward, as shown in FIG. Figure 8 As shown, the longitudinal moving member continues to move backward, and the vertical plate pushes the slide and the material rack assembly thereon to move backward through the pre-loaded second elastic member. The material rack assembly moves backward by sliding the slide column that slides on the inclined slide (the telescopic column retracts downward on the slide), and the slide rests on the stable block and does not move. At the same time, the material rack assembly does not move, and the workpiece on the rack block falls into the positioning groove of the positioning plate, as shown in FIG. Figure 9 As shown, the longitudinal moving part continues to move backward, the oblique groove on the oblique concave block contacts and drives the two guide pillars to move closer, and the two guide pillars drive the left frame to move left and the right frame to move right, and the left frame and the right frame are separated from the workpiece, as shown in FIG. Figure 10 As shown, the slide moves backward with the workpiece on the positioning plate. At this time, the workpiece is tilted upward and will not fall. After the support column is separated from the support block, the connecting member, the slide rod, and the clamping block are elastically reset under the action of the first elastic member, and the clamping block automatically clamps the workpiece. Figure 11 As shown, the longitudinal moving member then moves forward and resets. Under the action of the first elastic member, the longitudinal moving member moves forward, the inclined concave block disengages from the guide column, and the left frame member and the right frame member reset under the elastic action. After the longitudinal moving member reaches the second limit column, the longitudinal moving member pulls the slide forward and resets.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A four-axis multi-station CNC machine tool, comprising a machine body and a first motor, wherein the machine body is provided with slide rails symmetrically disposed on the left and right sides, wherein a slide table is provided on the slide rails for forward and backward sliding movement, wherein a screw is keyed to the output shaft of the first motor and is threadedly connected to the slide table, and wherein a turntable driven by a second motor is provided on the slide table, characterized in that: The turntable is provided with a positioning plate, the positioning plate is provided with a clamping assembly, the machine tool body is provided with a longitudinal moving part driven by a servo electric cylinder, the longitudinal moving part is elastically pre-loaded with an oblique moving assembly that slides on the slide rail, the oblique moving assembly is provided with a material racking assembly, and a stabilizing block for resisting the oblique moving assembly is installed on the slide rail. When the longitudinal moving part moves backward, the clamping assembly that moves forward with the slide table contacts the longitudinal moving part and releases the workpiece, and the longitudinal moving part drives the material racking assembly to move tilted backward through the oblique moving assembly. The lifting mechanism is a bottom rotatable plate, and the lifting mechanism is a bottom rotatable plate, and the lifting mechanism is a bottom rotatable plate, and the lifting mechanism is a bottom rotatable plate. The lifting mechanism is a bottom rotatable plate, and the lifting mechanism is a bottom rotatable plate. The middle of the connecting piece is provided with a resist column that cooperates with the resist block, the sliding rod outer sleeve is provided with a first elastic piece connecting the connecting piece and the positioning plate, the sliding rod is provided with a first limit column that abuts against the positioning plate, the oblique moving assembly includes a slide seat that is slidably fitted on the slide rail for forward and backward movement, and guide rods are symmetrically provided on the left and right sides of the front end of the slide seat, and the guide rods are slidably fitted in the guide hole for forward and backward movement, and the guide rod outer sleeve is provided with a second elastic piece arranged between the slide seat and the vertical plate, and the end of the guide rod is installed with a The second limiting column abuts against the said slide, and telescopic columns are symmetrically provided on the left and right sides of the upper end of the slide and slide up and down. Inclined slides are symmetrically provided on the left and right sides of the machine tool body. The side walls of the telescopic columns are longitudinally provided with sliding columns that slide on the inclined slides. The material rack assembly includes an inclined block connected between the two telescopic columns, and the inclined block is elastically slidably and vertically provided with relatively arranged left and right frame members. The bottoms of the left and right frame members are both provided with guide columns, and the inclined concave block can drive the two guide columns to move together to loosen the workpiece.

2. A four-axis multi-station CNC machine tool according to claim 1, characterized in that: A material receiving box is obliquely arranged on the slide.

3. The four-axis multi-station CNC machine tool according to claim 1, characterized in that: The inclined slideway has an inclination angle consistent with that of the inclined block.

4. The four-axis multi-station CNC machine tool according to claim 1, characterized in that: A sliding groove is vertically provided on the tilting block to accommodate the left frame and the right frame to slide left and right. A mounting block is installed on the side wall of the sliding groove. A telescopic rod is laterally provided on the mounting block to elastically extend and retract on the left frame and the right frame.

5. The four-axis multi-station CNC machine tool according to claim 1, characterized in that: The left frame member and the right frame member are both composed of two mutually connected frame blocks.

6. The four-axis multi-station CNC machine tool according to claim 1, characterized in that: A dust collection box is provided at the bottom of the tool seat of the machine tool body.

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