Chair leg double end drilling CNC tapping machine

Abstract

The present invention relates to the technical field of furniture manufacturing, and discloses a double-end drilling and tapping machine for chair legs, including a chain plate type conveyor belt, the chain plate surface of the conveyor belt is equidistantly fixedly connected with a plurality of support seats, the upper side wall of the support seat is fixedly connected with a group of T-shaped support plates 1 and four groups of support plates 2, a clamping assembly is installed above the support seat, the clamping assembly includes a card seat and a driver, the lower surface of the card seat is fixedly connected with the upper surface of the support seat, the surface of the card seat is provided with a plurality of card slots, the inside of the card slot is provided with an extrusion arm, the outer wall of the driver is fixedly connected with the mounting frame, and the bottom end of the electric push rod 1 is fixedly connected with a conical extrusion head. The five-star chair legs are transported as a whole to the drilling and tapping assembly through the conveyor belt for drilling and tapping operations, and the five chair legs are moved to the drilling and tapping assembly in sequence through the driver for processing, thereby reducing manual operations and realizing automated processing.

Description

Technical Field

[0001] The invention relates to the technical field of furniture manufacturing, in particular to a double-end drilling and tapping machine for chair legs. Background Art

[0002] The five-star chair legs require drilling and tapping mainly for functional and assembly requirements. Drilling is for the subsequent installation of other components, and tapping is to process internal threads on the drilled hole wall to install rollers, so that the chair can be moved easily.

[0003] The five-star chair legs need to be fixed with a clamp during the drilling and tapping process. The five-star chair legs are usually irregular in shape with multiple branches extending outward. This complex shape makes it difficult for the clamp to find a suitable contact point to stably clamp the workpiece. Traditional clamps may not be able to adapt well to its outer contour, causing the chair legs to easily move during processing. During the drilling operation, once the chair legs are slightly displaced, the drilled hole will deviate from the predetermined position, affecting the accuracy of subsequent tapping. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a double-end drilling and tapping machine for chair legs, which solves the problem that the existing clamps cannot stably clamp the five-star chair legs.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a double-end drilling CNC tapping machine for chair legs, including a chain-plate conveyor belt, the chain plate surface of the conveyor belt is equidistantly fixedly connected with a plurality of support seats, the upper side wall of the support seat is fixedly connected with a group of T-shaped support plates one and four groups of support plates two, a clamping assembly is installed above the support seat, the clamping assembly includes a card seat and a driver, the lower surface of the card seat is fixedly connected to the upper surface of the support seat, the surface of the card seat is provided with a plurality of card slots, the interior of the card slot is provided with a squeezing arm, and the squeezing arm Two groups of connecting rods are fixedly connected to the outer wall, and limiting rings are provided through the outer walls of the two groups of connecting rods. The bottom ends of the limiting rings are rotatably connected to the upper surface of the support seat, and the ends of the two groups of connecting rods away from the extrusion arm are commonly fixedly connected to the clamping arm, and the outer walls of the connecting rods are sleeved with springs. A U-shaped mounting bracket is fixedly connected to the upper surface of the conveyor belt body, and a drilling and tapping assembly is installed on the upper surface of the conveyor belt. The outer wall of the driver is fixedly connected to the mounting bracket, and an electric push rod 1 is fixedly connected to the driving end of the driver, and a conical extrusion head is fixedly connected to the bottom end of the electric push rod 1.

[0006] Preferably, the support plate one and the support plate two are arranged in a ring shape and equidistantly on the outside of the support seat, a five-star chair foot is placed above the support seat, the clamping assembly also includes a slide groove, the slide groove is opened on the surface of the support plate one, a plurality of connecting holes are opened on the upper surface of the extrusion head, and the outer wall of the limit ring is fixedly connected to a connecting rod.

[0007] Preferably, an L-shaped sliding seat is slidably connected inside the sliding groove, and two guide plates distributed in an eight-shaped shape are fixedly connected to the outer side wall of the sliding seat.

[0008] Preferably, a processing opening is opened on the lower surface of the sliding seat, a tension spring is fixedly connected to the side wall of the sliding seat, and one end of the tension spring away from the sliding seat is fixedly mounted on the inner wall of the sliding groove.

[0009] Preferably, an upper side wall of the sliding seat is provided with a slot, an inner wall of the slot is slidably connected with a triangular fixing block, and the fixing block is made of ferromagnetic material.

[0010] Preferably, the drilling and tapping assembly includes a fixed seat, the lower surface of the fixed seat is fixedly connected to the upper surface of the conveyor belt body, the upper side wall of the fixed seat is fixedly connected to an electric push rod 2, and the driving end of the electric push rod 2 is fixedly connected to an electromagnet.

[0011] Preferably, the lower side wall of the fixing seat is fixedly connected with an electric push rod 3, the driving end of the electric push rod 3 is fixedly connected with a U-shaped connecting frame, and the interior of the connecting frame is slidably connected with a mounting platform.

[0012] Preferably, a notch is provided on the lower surface of the mounting platform, a drilling machine body and a tapping machine body are fixedly connected to the upper surface of the mounting platform, an outer wall of the fixed seat is fixedly connected to a support frame, a hydraulic rod is fixedly connected to the surface of the support frame, a driving end of the hydraulic rod is fixedly connected to a slider, and the upper surface of the slider is slidably connected to the lower surface of the mounting platform.

[0013] Preferably, the drilling machine body comprises a drilling motor, a driving end of which is fixedly connected to a drill bit, and the tapping machine body comprises a tapping motor, a driving end of which is fixedly connected to a tap.

[0014] Preferably, an arc-shaped baffle is fixedly connected to the upper surface of the connecting frame, and collection boxes are fixedly provided on both sides of the connecting frame by bolts.

[0015] Working principle: During processing, the five-star chair legs are placed on the clamping assembly in sequence, and are transported to the drilling and tapping assembly by the conveyor belt for drilling and tapping processing. After processing, they are transported away by the conveyor belt. When placing the five-star chair legs, the center hole of the five-star chair legs is passed through the clamping arm and placed on the support seat, and the five chair legs of the five-star chair legs are placed on the support plate one and the four support plates two, and one of the chair legs is against the two guide plates, and the guide plates are tightly against the chair legs through the tension of the tension spring, and at the same time the inner wall of the center hole is against the clamping arm, so that The chair legs are initially limited to prevent them from falling or deflecting during transportation, which would affect the subsequent processing accuracy. When the five-star chair legs are transported to the drilling and tapping assembly, the electric push rod is extended to insert the extrusion head into the extrusion arm and push the extrusion arm to slide outward. The extrusion arm slides outward and pushes multiple groups of clamping arms to slide outward synchronously through the connecting rod, so that the clamping arms are against the inner wall of the center hole, realizing the center positioning and clamping of the five-star chair legs, achieving automatic and precise positioning of the five-star chair legs, and is suitable for five-star chair legs of various sizes and shapes.

[0016] When drilling, start the second electric push rod to extend, so that the electromagnet presses against the fixed block, and pushes the fixed block to tilt against the upper bending part of the chair leg, so that the chair leg to be processed is laterally tilted and fixed, so that the chair leg presses down tightly against the support plate one, and at the same time, the guide plate is pressed against both sides of the chair leg for limiting, so as to achieve multi-point fixation, and avoid the chair leg shaking during processing to affect the processing stability, start the third electric push rod, and adjust the horizontal position of the drilling machine body and the tapping machine body laterally through the extension and retraction of the third electric push rod, and adjust the vertical position of the drilling machine body and the tapping machine body vertically through the extension and retraction of the hydraulic rod. Through the coordinated operation of the two, the drilling machine body and the tapping machine body successively drill and tap the processing points of the chair legs above the support plate one. After the single-leg processing is completed, the electromagnet is started to adsorb the fixed block, and the electric push rod 2 contracts to drive the guide plate to move away from the chair leg to avoid affecting the rotation switching of the chair leg. Then the driver is started to rotate 72° at a time, thereby driving the chair legs on the support plate two to rotate to the support plate one in turn for processing, thereby realizing the automated multi-leg precise positioning of the five-star chair legs and the drilling and tapping processing, greatly improving the processing efficiency.

[0017] The present invention provides a double-end drilling and tapping machine for chair legs. It has the following beneficial effects:

[0018] 1. The present invention uses a conveyor belt to transport the five-star chair legs as a whole to the drilling and tapping assembly for drilling and tapping operations, and at the same time uses a driver to move the five chair legs in sequence to the drilling and tapping assembly for processing, thereby reducing manual operations and realizing automated processing.

[0019] 2. The present invention uses an extrusion head to push multiple groups of clamping arms to expand outward synchronously and press against the center of the five-star chair leg, thereby realizing the center positioning and clamping fixation of the five-star chair leg as a whole, achieving automatic and precise positioning of the five-star chair leg, and being suitable for clamping operations of five-star chair legs of various sizes and shapes, thereby improving the flexibility of the device.

[0020] 3. The present invention presses down the chair legs by the inclined surface of the fixing block, and at the same time the guide plates press against both sides of the chair legs for alignment and laterally fixing, so that a single chair remains stable during processing, and the chair legs are prevented from shaking or shifting due to the impact force during processing, thereby affecting the processing accuracy.

[0021] 4. The present invention uses the coordinated operation of the electric push rod and the hydraulic rod to enable the drilling machine body and the tapping machine body to adjust their positions in two dimensions, thereby being able to perform drilling and tapping operations on the to-be-processed points of different types of chair legs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A perspective view of the present invention;

[0023] Figure 2 It is a partial schematic diagram of the conveyor belt of the present invention;

[0024] Figure 3 This is a schematic diagram of the support base and five-star chair legs of the present invention;

[0025] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0026] Figure 5 For the present invention Figure 3 Enlarged view of point B in the middle;

[0027] Figure 6 It is a schematic diagram of the structure of the mounting frame of the present invention;

[0028] Figure 7 For the present invention Figure 6 Enlarged view of point C in the middle;

[0029] Figure 8 is a cross-sectional schematic diagram of a connecting frame of the present invention;

[0030] Fig. 9 It is a schematic diagram of the connecting frame structure of the present invention.

[0031] Among them, 1. conveyor belt; 2. support seat; 3. support plate 1; 4. support plate 2; 5. five-star chair foot; 6. clamping assembly; 601. clamping seat; 602. clamping slot; 603. extrusion arm; 604. connecting rod; 605. limit ring; 606. clamping arm; 607. spring; 608. driver; 609. electric push rod 1; 610. extrusion head; 611. slide slot; 612. sliding seat; 613. guide plate; 614. processing port; 615. tension spring; 616 , fixing block; 617, connecting hole; 618, connecting rod; 7, mounting frame; 8, drilling and tapping assembly; 801, fixing seat; 802, electric push rod 2; 803, electromagnet; 804, electric push rod 3; 805, connecting frame; 806, mounting table; 807, drilling machine body; 808, tapping machine body; 809, supporting frame; 810, hydraulic rod; 811, slider; 812, baffle; 813, collection box; 814, telescopic plate; 815, blocking ring. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings 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.

[0033] Please refer to the attached Figure 1 -Attached Figure 7The embodiment of the present invention provides a double-end drilling and tapping machine for chair legs, including a chain-type conveyor belt 1 and a PLC controller, the PLC controller is electrically connected to a driver 608, an electric push rod 609 and the conveyor belt 1, a plurality of support seats 2 are fixedly connected to the chain plate surface of the conveyor belt 1 at equal intervals, a group of T-shaped support plates 1 3 and four groups of support plates 2 4 are fixedly connected to the upper side wall of the support seat 2, the bottom end of the support plate 1 3 is fixedly connected to the chain plate of the conveyor belt 1, a clamping assembly 6 is installed above the support seat 2, the clamping assembly 6 includes a clamping seat 601 and a driver 608, the lower surface of the clamping seat 601 is fixedly connected to the upper surface of the support seat 2, a plurality of clamping grooves 602 are opened on the surface of the clamping seat 601, a squeezing arm 603 is arranged inside the squeezing arm 603, and two groups of connecting rods 604 are fixedly connected to the outer wall of the squeezing arm 603, and the two groups of connecting rods 604 A limit ring 605 is provided through the outer wall, and the bottom end of the limit ring 605 is rotatably connected to the upper surface of the support seat 2. The two sets of connecting rods 604 are fixedly connected with a clamping arm 606 at one end away from the extrusion arm 603. The outer wall of the clamping arm 606 is fixedly provided with a rubber layer for increasing the friction with the center hole of the five-star chair foot 5. The outer wall of the connecting rod 604 is sleeved with a spring 607. The upper surface of the body of the conveyor belt 1 is fixedly connected with a U-shaped mounting bracket 7. The upper surface of the conveyor belt 1 is installed with a drilling and tapping assembly 8. The outer wall of the driver 608 is fixedly connected to the mounting bracket 7. The center point of the driver 608 is coaxially arranged with the center point of the mounting bracket 7. The driving end of the driver 608 is fixedly connected with an electric push rod 609. The bottom end of the electric push rod 609 is fixedly connected with a conical extrusion head 610, and the extrusion head 610 is located directly below the mounting bracket 7.

[0034] Specifically, the conveyor belt 1 is used to convey the support seat 2 to the bottom of the mounting frame 7, the support seat 2, the support plate 1 3 and the support plate 2 4 cooperate to support the five-star chair foot 5, the mounting frame 7 is used to support the driver 608, the connecting rod 604 is used to connect the extrusion arm 603 and the clamping arm 606, the limiting ring 605 is used to limit the spring 607, and the spring 607 is used to apply elastic force to the extrusion arm 603, so that the multiple groups of clamping arms 606 gather together, so that the center hole of the five-star chair foot 5 passes through the clamping arm 606. When the five-star chair foot 5 is conveyed to the bottom of the mounting frame 7, the electric push rod 1 609 is used to push The movable extrusion head 610 moves downward, and when the extrusion head 610 is gradually inserted into the inner wall of the extrusion arm 603, it will push the extrusion arm 603 to slide outward. The extrusion arm 603 slides outward and pushes the clamping arm 606 to slide outward until it rests against the inner wall of the center hole of the five-star chair leg 5, thereby realizing the center positioning and fixation of the five-star chair leg 5 as a whole, improving the accuracy during processing, and the driver 608 is used to drive the five-star chair leg 5 to rotate after positioning, so that the chair leg rotates to the drilling and tapping assembly 8 in turn, and the drilling and tapping assembly 8 is used to drill and tap the chair leg, thereby realizing automatic positioning and processing.

[0035] Please see attached Figure 3 -Attached Figure 5 , support plate 1 3 and support plate 2 4 are arranged in a ring shape and equidistantly on the outside of the support seat 2, and a five-star chair foot 5 is placed above the support seat 2. The clamping assembly 6 also includes a slide groove 611, which is opened on the surface of the support plate 3, and a plurality of connecting holes 617 are opened on the upper surface of the extrusion head 610. The outer wall of the limiting ring 605 is fixedly connected with a connecting rod 618, and the inner sliding connection of the slide groove 611 is connected with an L-shaped sliding seat 612. The outer wall of the sliding seat 612 is fixedly connected with two guide plates 613 distributed in an eight-shaped shape. The two guide plates 613 are located on both sides of the horizontal center line of the support plate 3. A processing opening 614 is opened on the lower surface of the sliding seat 612. The side wall of the sliding seat 612 is fixedly connected with a tension spring 615, and the end of the tension spring 615 away from the sliding seat 612 is fixedly installed on the inner wall of the slide groove 611. When the support plate 3 is transported under the mounting frame 7, the horizontal center line of the support plate 3 and the horizontal center line of the mounting frame 7 are on the same vertical plane.

[0036] Specifically, the connection holes 617 correspond to the positions and numbers of the card slots 602 one by one, and there are five connection holes 617 and card slots 602. The card slots 602 clamp the extrusion arm 603 to limit the position of the limit ring 605 connected to the extrusion arm 603, so that when the extrusion head 610 descends, the connecting rod 618 can be inserted into one of the connection holes 617, so that when the position of the chair leg is adjusted, the driver 608 can drive the limit ring 605 and the clamping arm 606 to rotate through the connecting rod 618, thereby driving the chair leg to rotate. In order to prevent the extrusion head 610 and the extrusion arm 603 from slipping and affecting the rotation of the chair legs, the processing port 614 is used for allowing the tap and drill to pass through the sliding seat 612 to process the chair legs, the slide groove 611 is used to connect the sliding seat 612, and the tension spring 615 is used to connect the sliding seat 612 and the slide groove 611, and one of the chair legs is pressed against the guide plate 613. The guide plate 613 is tightly pressed against the single chair leg through the tension of the tension spring 615, thereby cooperating with the clamping arm 606 to initially limit the five-star chair leg 5 to prevent the five-star chair leg 5 from deflecting during transportation.

[0037] Please refer to the attached Figure 5 -Attached Figure 6 The upper side wall of the sliding seat 612 is provided with a slot, and the inner wall of the slot is slidably connected with a triangular fixed block 616, and the fixed block 616 is made of ferromagnetic material. The drilling and tapping assembly 8 includes a fixed seat 801, and the lower surface of the fixed seat 801 is fixedly connected to the upper surface of the body of the conveyor belt 1. The upper side wall of the fixed seat 801 is fixedly connected with an electric push rod 802, and the driving end of the electric push rod 802 is fixedly connected with an electromagnet 803. The PLC controller is electrically connected to the electric push rod 802 and the electromagnet 803.

[0038] Specifically, the slot is used for the fixed block 616 to slide horizontally along the sliding seat 612, the fixed seat 801 is used to fix and support the electric push rod 802, and the electric push rod 802 is used to horizontally adjust the position of the electromagnet 803. Before processing, the electric push rod 802 pushes the electromagnet 803 against the fixed block 616, so that the inclined surface of the fixed block 616 presses down the chair foot, and at the same time, the guide plate 613 presses against both sides of the chair foot for alignment and laterally fixation, so that the chair foot on the support plate 1 3 can be stably located above the drilling machine body 807 and the tapping machine body 808, so as to achieve precise processing and prevent the chair foot from shaking or shifting due to the impact force during processing, thereby affecting the processing accuracy.

[0039] Please refer to the attached Figure 8 The lower side wall of the fixed seat 801 is fixedly connected with an electric push rod 3 804, the driving end of the electric push rod 3 804 is fixedly connected with a U-shaped connecting frame 805, the interior of the connecting frame 805 is slidably connected with a mounting platform 806, the lower surface of the mounting platform 806 is provided with a notch, the upper surface of the mounting platform 806 is fixedly connected with a drilling machine body 807 and a tapping machine body 808, the drilling machine body 807 includes a drilling motor, the driving end of the drilling motor is fixedly connected with a drill bit, the tapping machine body 808 includes a tapping motor, the driving end of the tapping motor is fixedly connected with a tap The center lines of the drilling machine body 807 and the tapping machine body 808 are maintained in the same vertical plane with the transverse center line of the mounting frame 7. The outer wall of the fixed seat 801 is fixedly connected to the support frame 809. The surface of the support frame 809 is fixedly connected to the hydraulic rod 810. The driving end of the hydraulic rod 810 is fixedly connected to the slider 811. The upper surface of the slider 811 is slidably connected to the lower surface of the mounting platform 806. The electric push rod three 804 and the electric push rod two 802 pass through the mounting frame 7. The PLC controller is electrically connected to the electric push rod three 804, the tapping motor and the drilling motor.

[0040] Specifically, the drilling machine body 807 is used for drilling, the tapping machine body 808 is used for tapping after drilling, the fixing seat 801 is used to support the electric push rod 3 804 and the support frame 809, the connecting frame 805 is used to vertically slide and connect the mounting platform 806, the mounting platform 806 is used to install the drilling machine body 807 and the tapping machine body 808, the notch is used for the driving end of the hydraulic rod 810 to pass through the connecting frame 805, the slider 811 is used to connect the hydraulic rod 810 and the mounting platform 806, and the electric push rod 3 804 is used to push the connecting frame 805 horizontally along the slider 811 moves, the connecting frame 805 moves to drive the mounting platform 806 to move, the mounting platform 806 moves to drive the drilling machine body 807 and the tapping machine body 808 to adjust their positions horizontally, the hydraulic rod 810 is used to vertically drive the slider 811 to rise and fall, the lifting of the slider 811 drives the mounting platform 806 to rise and fall along the connecting frame 805, thereby adjusting the height of the drilling machine body 807 and the tapping machine body 808, so that the drilling machine body 807 and the tapping machine body 808 can adjust their directions in two dimensions, thereby moving to the waiting points of the chair legs in turn to perform drilling and tapping operations.

[0041] Please see attached Fig. 9 An arc-shaped baffle 812 is fixedly connected to the upper surface of the connecting frame 805, and collection boxes 813 are fixedly provided on both sides of the connecting frame 805 by bolts. The drill bit and the tap respectively penetrate the baffle 812, and arc-shaped telescopic plates 814 are respectively provided on both sides of the drill bit and the tap. The telescopic plate 814 includes a lower shell body, and the inner wall of the lower shell body is slidably connected to the upper plate body. The bottom end of the upper plate body is fixedly connected to the inner bottom wall of the lower shell body with an elastic member, the lower shell body penetrates and is fixedly connected to the baffle 812, and the outer side walls of the two adjacent upper plate bodies are fixedly connected with blocking rings 815.

[0042] Specifically, a gap is left between two adjacent sets of telescopic plates 814 to facilitate the discharge of debris, and the blocking ring 815 is used to block the area above the gap to prevent debris from being directly splashed out. After the blocking ring 815 absorbs the impact force of the debris when it is thrown out, the debris falls normally on the baffle 812. The telescopic plate 814 intercepts the debris generated during drilling and tapping, and makes the debris slide along the baffle 812 to the inner wall of the collection box 813 for collection, thereby keeping the surface of the conveyor belt 1 clean. The elastic member is used to elastically support the upper plate body. When the upper plate body follows the drill bit and tap to rise and presses against the chair leg, it can be retracted to the inside of the lower shell body to avoid motion interference when intercepting debris.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-end drilling and tapping machine for chair legs, comprising a chain-plate conveyor belt (1), characterized in that: The chain plate surface of the conveyor belt (1) is equidistantly and fixedly connected to a plurality of support seats (2); the upper side wall of the support seat (2) is fixedly connected to a group of T-shaped support plates (1) and four groups of support plates (2); a clamping assembly (6) is installed above the support seat (2); the clamping assembly (6) comprises a clamping seat (601) and a driver (608); the lower surface of the clamping seat (601) is fixedly connected to the upper surface of the support seat (2); a plurality of clamping grooves (602) are provided on the surface of the clamping seat (601); a squeezing arm (603) is provided inside the squeezing arm (603); two groups of connecting rods (604) are fixedly connected to the outer wall of the squeezing arm (603); the outer walls of the two groups of connecting rods (604) are penetrated by a plurality of connecting rods (604). A limit ring (605) is provided, the bottom end of the limit ring (605) is rotatably connected to the upper surface of the support seat (2), one end of the two groups of connecting rods (604) away from the extrusion arm (603) is fixedly connected to a clamping arm (606), the outer wall of the connecting rod (604) is sleeved with a spring (607), the upper surface of the body of the conveyor belt (1) is fixedly connected to a U-shaped mounting frame (7), the upper surface of the conveyor belt (1) is installed with a drilling and tapping assembly (8), the outer wall of the driver (608) is fixedly connected to the mounting frame (7), the driving end of the driver (608) is fixedly connected to an electric push rod (609), and the bottom end of the electric push rod (609) is fixedly connected to a conical extrusion head (610).

2. The double-end drilling and tapping machine for chair legs according to claim 1, characterized in that: The support plate one (3) and the support plate two (4) are arranged in a circular shape and equidistantly on the outer side of the support seat (2); a five-star chair foot (5) is placed above the support seat (2); the clamping assembly (6) also includes a slide groove (611); the slide groove (611) is opened on the surface of the support plate one (3); a plurality of connecting holes (617) are opened on the upper surface of the extrusion head (610); and the outer side wall of the limit ring (605) is fixedly connected to a connecting rod (618).

3. The double-end drilling and tapping machine for chair legs according to claim 2, characterized in that: An L-shaped sliding seat (612) is slidably connected inside the sliding groove (611), and the outer side wall of the sliding seat (612) is fixedly connected to two guide plates (613) distributed in an eight-shaped shape.

4. The double-end drilling and tapping machine for chair legs according to claim 3, characterized in that: A processing opening (614) is provided on the lower surface of the sliding seat (612), and a tension spring (615) is fixedly connected to the side wall of the sliding seat (612). One end of the tension spring (615) away from the sliding seat (612) is fixedly installed on the inner wall of the sliding groove (611).

5. The double-end drilling and tapping machine for chair legs according to claim 3, characterized in that: The upper side wall of the sliding seat (612) is provided with a slot, and the inner wall of the slot is slidably connected with a triangular fixing block (616), and the fixing block (616) is made of ferromagnetic material.

6. The double-end drilling and tapping machine for chair legs according to claim 1, characterized in that: The drilling and tapping assembly (8) comprises a fixed seat (801), the lower surface of the fixed seat (801) is fixedly connected to the upper surface of the body of the conveyor belt (1), the upper side wall of the fixed seat (801) is fixedly connected to an electric push rod 2 (802), and the driving end of the electric push rod 2 (802) is fixedly connected to an electromagnet (803).

7. The double-end drilling and tapping machine for chair legs according to claim 6, characterized in that: The lower side wall of the fixed seat (801) is fixedly connected to an electric push rod three (804), the driving end of the electric push rod three (804) is fixedly connected to a U-shaped connecting frame (805), and the interior of the connecting frame (805) is slidably connected to a mounting platform (806).

8. The double-end drilling and tapping machine for chair legs according to claim 7, characterized in that: A notch is provided on the lower surface of the mounting platform (806); a drilling machine body (807) and a tapping machine body (808) are fixedly connected to the upper surface of the mounting platform (806); a support frame (809) is fixedly connected to the outer wall of the fixing seat (801); a hydraulic rod (810) is fixedly connected to the surface of the support frame (809); a driving end of the hydraulic rod (810) is fixedly connected to a slider (811); and the upper surface of the slider (811) is slidably connected to the lower surface of the mounting platform (806).

9. The double-end drilling and tapping machine for chair legs according to claim 8, characterized in that: The drilling machine body (807) comprises a drilling motor, the driving end of which is fixedly connected to a drill bit, and the tapping machine body (808) comprises a tapping motor, the driving end of which is fixedly connected to a tap.

10. The double-end drilling and tapping machine for chair legs according to claim 7, characterized in that: An arc-shaped baffle (812) is fixedly connected to the upper surface of the connecting frame (805), and a collection box (813) is fixedly provided on both sides of the connecting frame (805) by means of bolts.

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