CN214602250U - Pull-down broaching machine - Google Patents

Abstract

The utility model discloses a drop-down broaching machine relates to broaching shaping technical field, and its technical scheme main points are: the broaching machine comprises a bedstead, a sliding seat, a driving part, a clamping mechanism, a broach and a feeding mechanism, wherein the bedstead is provided with a supporting part, the sliding seat is arranged on the bedstead in a sliding way, the driving part is arranged on the bedstead and can drive the sliding seat to be close to or far away from the supporting part, the clamping mechanism is arranged on the sliding seat and is used for clamping the broach, and the feeding mechanism is arranged on the supporting part and is used for driving a workpiece to be close to or far away from the broach. The workpiece to be machined is placed on the feeding mechanism, the feeding mechanism feeds the workpiece to the broach direction, the clamping mechanism fixes the broach, the driving piece drives the sliding seat to slide towards the feeding mechanism, so that the broach is driven to move and machine the workpiece on the feeding mechanism, broaching of the workpiece is completed, the hand of a user does not directly contact with the broach, the feeding mechanism feeds the workpiece, the workpiece feeding device is more suitable for the user to use, and meanwhile, the safety coefficient of the user is increased.

Description

Pull-down broaching machine

Technical Field

The utility model relates to a broaching shaping technical field, in particular to pull-down broaching machine.

Background

The broaching machine is a machine tool which utilizes various broaches to carry out broaching processing of various shapes on the surface or inner hole of a part to be processed; the broaching can obtain higher dimensional accuracy and smaller surface roughness, has high productivity and is suitable for mass production. Broaching machines can be divided into inner broaching machines and outer broaching machines according to the difference of the machined surfaces, and the inner broaching machines are commonly used for broaching inner surfaces, such as spline holes, square holes and the like.

In the prior art, most broaching machines only have the main motion of straight broaching by the broaching tool and no feed motion. Usually, a part to be machined is manually placed on a broaching station, so that the machining efficiency is low, the machining experience of a user for placing the workpiece is influenced, the yield is relatively low, no protective measures are taken between a broach and the user, the moving broach has potential safety hazards to the user, and the broaching machine is not suitable for the user.

SUMMERY OF THE UTILITY MODEL

To the deficiency that prior art exists, the utility model aims to provide a drop-down broaching machine, it has the advantage that is suitable for the user to use.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a pull-down broaching machine, the broaching machine includes bedstead, slide, driving piece, fixture, broach and feed mechanism, the bedstead is last to have a supporting part, the slide slides and sets up in on the bedstead, the driving piece set up in on the bedstead and can drive the slide is close to or keeps away from the supporting part, fixture set up in on the slide, and fixture is used for the centre gripping the broach, feed mechanism set up in on the supporting part and be used for driving the work piece and be close to or keep away from the broach.

Through the technical scheme, the workpiece to be machined is placed on the feeding mechanism, the feeding mechanism feeds the workpiece to the broach direction, the clamping mechanism fixes the broach, the driving piece drives the sliding seat to slide to the feeding mechanism direction, so that the clamping mechanism and the broach are driven to synchronously move, the broach machines the workpiece on the feeding mechanism, the broaching of the workpiece is completed, the hand of a user is not directly contacted with the broach, the feeding mechanism feeds the workpiece, the broach machine is suitable for being used by the user, and meanwhile, the safety factor of the user is increased.

Preferably, the broaching machine further comprises a feeding assembly and a feeding assembly, the feeding assembly is arranged on the bed frame and used for supplying workpieces to the feeding assembly, and the feeding assembly can supply the workpieces to the feeding mechanism and feed the workpieces.

Through above-mentioned technical scheme, the material loading subassembly will wait to process the work piece and supply for the feeding subassembly, will wait to process the work piece through the feeding subassembly and carry to feed mechanism, further avoided the possibility that the user directly contacted with the broach.

Preferably, the feeding assembly comprises a first fixing frame, a first feeding guide rail, a clamp seat and a feeding cylinder, the first fixing frame is connected with the supporting portion, the first feeding guide rail is arranged on the first fixing frame, the clamp seat is connected to the first feeding guide rail in a sliding mode, the first clamp for clamping a workpiece is arranged on the clamp seat, the feeding cylinder is fixed to the first fixing frame, the output end of the feeding cylinder is connected with the clamp seat, and the feeding cylinder is used for driving the clamp seat to be close to or far away from the supporting portion.

Through the technical scheme, the workpiece to be machined is placed on the first clamp, the relative position of the workpiece to be machined is guaranteed to be fixed, and the feeding cylinder pushes the clamp seat to move towards the direction of the supporting part, so that the feeding assembly can conveniently supply the workpiece to be machined to the feeding mechanism.

Preferably, the feeding assembly comprises a second fixing frame, a first feeding guide rail, a conveying piece, a clamping jaw seat and a first feeding cylinder, the second fixing frame is connected with the supporting part, the first feeding guide rail is arranged on the second fixing frame, the conveying piece is connected with the first feeding guide rail in a sliding manner, the clamping jaw seat is connected with the conveying piece in a sliding manner, the first feeding cylinder is fixed on the second fixing frame, and the output end of the first feeding air cylinder is connected with the conveying piece and drives the conveying piece to be close to or far away from the feeding assembly, a clamping jaw cylinder I and a clamping jaw cylinder II are arranged on the clamping jaw seat at intervals, the output end of the clamping jaw cylinder I is connected with a feeding clamping jaw, the output end of the clamping jaw cylinder II is connected with a discharging clamping jaw, the feeding clamping jaw can clamp a workpiece on the clamp I, and the discharging clamping jaw can clamp the workpiece on the feeding mechanism.

Through the technical scheme, the conveying piece pushes the clamping jaw seat to move towards the direction of the supporting part, the clamping jaw cylinder I on the clamping jaw seat drives the feeding clamping jaw to clamp a workpiece to be machined on the clamp I, meanwhile, the clamping jaw cylinder II drives the discharging clamping jaw to clamp the workpiece which is machined on the feeding mechanism, and the conveying piece pushes the clamping jaw seat to be far away from the supporting part; the feeding cylinder pushes the clamping jaw seat to move along the length direction of the feeding guide rail I, so that a workpiece to be processed clamped by the feeding clamping jaw is moved to the position above the feeding mechanism, and meanwhile, the blanking clamping jaw and the processed workpiece are far away from the feeding mechanism; the conveying piece pushes the clamping jaw seat to move towards the direction of the supporting part, after the feeding clamping jaw is released, a workpiece to be processed is placed on the feeding mechanism, feeding is completed, and after the discharging clamping jaw is released, the processed workpiece is separated from the discharging clamping jaw, and discharging is completed.

Preferably, the conveying part comprises a fixed seat, a second feeding guide rail and a second feeding cylinder, the fixed seat is connected with the first feeding guide rail in a sliding mode, the second feeding guide rail is arranged on the fixed seat, the clamping jaw seat is connected with the second feeding guide rail in a sliding mode, the second feeding cylinder is fixed on the fixed seat, and the output end of the second feeding cylinder is connected with the clamping jaw seat and can drive the clamping jaw seat to be close to or far away from the supporting part.

Through the technical scheme, the feeding cylinder II drives the clamp seat to be close to or far away from the supporting part, so that the feeding clamping jaw on the clamp seat can clamp a workpiece to be machined on the clamp I, and meanwhile, the discharging clamping jaw can clamp the machined workpiece on the feeding mechanism.

Preferably, the bedstead is provided with a sliding groove, a first sliding rail is arranged in the sliding groove, the sliding seat is connected with the first sliding rail in a sliding manner, the driving part comprises a driving motor and a screw rod, the driving motor is fixed on the bedstead, the screw rod is located in the sliding groove and is in threaded connection with the sliding seat, and the upper end of the screw rod is connected with the output end of the driving motor.

Through above-mentioned technical scheme, driving motor drives the lead screw and rotates to the slide that drives and be connected with the lead screw slides, and fixture and broach then follow the slide and slide in step.

Preferably, the clamping mechanism comprises a first chuck seat, a second chuck seat, an upper chuck and a lower chuck, the first chuck seat and the second chuck seat are arranged on the sliding seat at intervals along the height direction, the upper chuck is fixed on the first chuck seat, the lower chuck is fixed on the second chuck seat, and both the lower chuck and the upper chuck can clamp the broach.

According to the technical scheme, the upper chuck clamps the broach, the sliding seat moves towards the supporting part, the lower chuck clamps the lower end of the broach after the lower end of the broach extends out to penetrate through the workpiece to be machined, meanwhile, the upper chuck releases the upper end of the broach, the sliding seat continues to slide downwards, the broach broaches the workpiece to be machined, and machining of the workpiece to be machined is completed.

Preferably, the clamping mechanism further comprises a cutter feeding assembly, the cutter feeding assembly comprises a second sliding rail and a cutter feeding cylinder, the second sliding rail is fixed on the outer end face of the sliding seat, the first chuck seat is connected to the second sliding rail in a sliding manner, the cutter feeding cylinder is fixed to the sliding seat, and the output end of the cutter feeding cylinder is connected with the first chuck seat and can push the first chuck seat to be close to or far away from the second chuck seat.

According to the technical scheme, the lower chuck clamps the lower end of the broach, after the workpiece is machined, the feeding mechanism drives the machined workpiece to be far away from the broach, the tool feeding cylinder pushes the chuck seat to move towards the two directions of the chuck seat at the moment, so that the upper chuck can clamp the upper end of the broach, after the lower chuck releases the upper end of the broach, the tool feeding cylinder drives the chuck seat I and the broach to be far away from the lower chuck, the broach position is changed, and the broach is reset.

Preferably, an anti-collision assembly is arranged between the output end of the cutter feeding cylinder and the first chuck base, the anti-collision assembly comprises a storage cylinder, a connecting block, a positioning block and a spring, one end of the storage cylinder is fixed with the first chuck base, a storage hole is formed in the storage cylinder, a first blocking shoulder is arranged on the hole wall at the upper end of the storage hole, and a sliding hole is formed in the side wall of the storage cylinder; the outer end of the connecting block extends out of the accommodating hole and is connected with the output end of the cutter feeding cylinder, the outer wall of the inner end of the connecting block is provided with a second retaining shoulder which can be matched with the first retaining shoulder, the connecting block is provided with an installation hole, the positioning block is arranged in the installation hole, and the outer end of the positioning block is positioned in the sliding hole; the spring is arranged in the accommodating hole, one end of the spring abuts against the first clamping head seat, and the other end of the spring can abut against the lower end of the connecting block.

Through the technical scheme, the containing cylinder is fixed with the first clamping head seat, the outer end of the connecting block is connected with the output end of the cutter feeding cylinder, and after the whole weight of the first clamping head seat acts on the containing cylinder, the second blocking shoulder at the inner end of the connecting block is contacted with the first blocking shoulder in the containing hole, so that the first clamping head seat is limited; when the tool feeding cylinder pushes the chuck seat to move towards the second chuck seat, if the broach collides, the first chuck seat stops moving due to the collision, the tool feeding cylinder continues to push downwards, the second blocking shoulder is separated from the first blocking shoulder, the spring is extruded by the lower end of the connecting block, the acting force of the output end of the tool feeding cylinder only acts on the spring, and the inner broach is prevented from moving downwards continuously to damage the broach.

Preferably, the feeding mechanism comprises a third sliding rail, a sliding block and a feeding cylinder, the third sliding rail is fixed with the supporting part, the sliding block is connected with the third sliding rail in a sliding manner, a first abdicating hole is formed in the sliding block, a second clamp is arranged on the sliding block, a second abdicating hole communicated with the first abdicating hole is formed in the second clamp, and the workpiece is provided with a central hole communicated with the second abdicating hole; the feeding cylinder is fixed on the supporting part, and the output end of the feeding cylinder is fixedly connected with the sliding block.

According to the technical scheme, the feeding assembly supplies the feeding assembly with the workpiece to be machined, then the feeding assembly places the workpiece to be machined on the fixture II, the fixture II positions the workpiece to be machined, and a central hole in the workpiece to be machined is communicated with the abdicating hole I and the abdicating hole II, so that feeding of the workpiece to be machined is completed; after the feeding of the workpiece is finished, the feeding cylinder pushes the sliding block to be close to the broach, so that the broach is coaxial with the central hole, and the feeding of the workpiece is realized.

Drawings

FIG. 1 is a schematic view of a workpiece structure;

FIG. 2 is a schematic structural diagram of an embodiment;

FIG. 3 is another schematic structural view of the embodiment (omitting the feeding assembly and the feeding assembly);

FIG. 4 is a schematic structural view of the bed frame and the clamping mechanism of the embodiment, which is mainly used for showing a reset state of the clamping head seat;

FIG. 5 is a schematic view of the structure of the clamping mechanism of the embodiment;

FIG. 6 is an exploded view of the bumper assembly of the exemplary embodiment;

FIG. 7 is a cross-sectional view of FIG. 5, mainly illustrating a first shoulder and a second shoulder;

FIG. 8 is a schematic structural view of a feeding state of the feeding mechanism in the embodiment;

FIG. 9 is a schematic structural view of the feeding mechanism after the feeding mechanism is reset in the embodiment;

FIG. 10 is a schematic structural diagram of a feeding assembly and a feeding assembly in the embodiment;

FIG. 11 is a schematic structural view of a conveying member in the embodiment.

Reference numerals: 100. a bed frame; 110. a support portion; 111. a third abdicating hole; 112. a second limit stop; 120. a chute; 121. a first slide rail;

200. a slide base;

300. a drive member; 310. a drive motor; 320. a screw rod;

400. a clamping mechanism; 410. a first chuck seat; 420. a second chuck seat; 430. an upper chuck; 440. a lower chuck; 450. a knife feeding assembly; 451. a second slide rail; 452. a cutter feeding cylinder;

500. broaching;

600. a feed mechanism; 610. a third slide rail; 620. a slider; 621. a first abdicating hole; 622. a second clamp; 6221. a second abdicating hole; 623. a yielding hole IV; 624. a first limit stop; 630. a feed cylinder;

700. a feeding assembly; 710. a first fixing frame; 720. a feeding guide rail; 730. a clamp seat; 731. a first clamp; 740. a feeding cylinder;

800. a feeding assembly; 810. a second fixing frame; 820. a feeding guide rail I; 830. a conveying member; 831. a fixed seat; 832. a feeding guide rail II; 833. a feeding cylinder II; 840. a jaw seat; 841. a clamping jaw cylinder I; 8411. a feeding clamping jaw; 842. a clamping jaw cylinder II; 8421. blanking clamping jaws; 850. a feeding cylinder I;

900. an anti-collision assembly; 910. a storage cylinder; 911. a receiving hole; 912. a first blocking shoulder; 913. a sliding hole; 920. connecting blocks; 921. a second shoulder; 922. mounting holes; 930. positioning blocks; 940. a spring; 950. a damping ring;

1. a workpiece; 1a, a central hole.

Detailed Description

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Further, as shown in fig. 1, the workpiece 1 has a center hole 1a, and the position to be machined of the workpiece 1 is the center hole 1a, and it is necessary to broach internal teeth in the hole wall of the center hole 1a by the broach 500.

The present invention will be described in further detail with reference to the accompanying drawings.

A pull-down broaching machine, as shown in fig. 2 to 11, comprises a bed frame 100, a slide carriage 200, a driving member 300, a clamping mechanism 400, a broaching tool 500 and a feeding mechanism 600, wherein the bed frame 100 is provided with a supporting part 110, the supporting part 110 can be fixed on the bed frame 100 by bolts or welded with the bed frame 100; the slide carriage 200 is slidably disposed on the frame 100, the driving member 300 is disposed on the frame 100 and can drive the slide carriage 200 to approach or leave the supporting portion 110, the clamping mechanism 400 is disposed on the slide carriage 200, the clamping mechanism 400 is used for clamping the broach 500, and the feeding mechanism 600 is disposed on the supporting portion 110 and is used for driving the workpiece 1 to approach or leave the broach 500.

Specifically, one side of the bed frame 100 close to the supporting portion 110 is provided with a sliding groove 120, a first sliding rail 121 is arranged in the sliding groove 120, the sliding seat 200 is connected with the first sliding rail 121 in a sliding manner, the driving member 300 includes a driving motor 310 and a screw rod 320, the driving motor 310 is fixed on the bed frame 100, an output end of the driving motor 310 faces the sliding groove 120, the screw rod 320 is located in the sliding groove 120 and is in threaded connection with the sliding seat 200, and an upper end of the screw rod 320 is connected with an output end of the driving motor 310 through a coupler or is welded and fixed.

Further, the broaching machine further comprises a feeding assembly 700 and a feeding assembly 800, the feeding assembly 700 is arranged on the bed frame 100, the feeding assembly 700 is used for feeding the workpiece 1 to the feeding assembly 800, and the feeding assembly 800 can feed the workpiece 1 to the feeding mechanism 600 and blanking.

The feeding assembly 700 includes a first fixing frame 710, a feeding guide rail 720, a clamp seat 730 and a feeding cylinder 740, wherein the first fixing frame 710 is connected with a side edge of the supporting portion 110, the feeding guide rail 720 is disposed on the first fixing frame 710, the feeding guide rail 720 faces the supporting portion 110, the clamp seat 730 is connected to the feeding guide rail 720 in a sliding manner, a first clamp 731 for clamping the workpiece 1 is disposed on the clamp seat 730, the feeding cylinder 740 is fixed on the first fixing frame 710, an output end of the feeding cylinder 740 is connected with the clamp seat 730, and the feeding cylinder 740 can drive the clamp seat 730 to approach or leave the supporting portion 110.

The feeding assembly 800 comprises a second fixing frame 810, a first feeding guide rail 820, a conveying piece 830, a clamping jaw seat 840 and a first feeding cylinder 850, the second fixing frame 810 is connected with the supporting part 110, the first feeding guide rail 820 is fixed on the second fixing frame 810, the conveying piece 830 is connected with the first feeding guide rail 820 in a sliding manner, the clamping jaw seat 840 is connected with the conveying piece 830 in a sliding manner, the first feeding cylinder 850 is fixed on the second fixing frame 810, the output end of the feeding cylinder I850 is connected with the conveying member 830 and drives the conveying member 830 to be close to or far away from the feeding assembly 700, a clamping jaw cylinder I841 and a clamping jaw cylinder II 842 are arranged on the clamping jaw seat 840 at intervals, the output end of the clamping jaw cylinder I841 is connected with a feeding clamping jaw 8411, the clamping jaw cylinder I841 is used for controlling the feeding clamping jaw 8411 to clamp the workpiece 1 on the clamp 731, the output end of the clamping jaw cylinder II 842 is connected with a discharging clamping jaw 8421, and the clamping jaw cylinder II 842 is used for controlling the discharging clamping jaw 8421 to clamp the workpiece 1 on the feeding mechanism 600. The first clamping jaw cylinder 841 and the second clamping jaw cylinder 842 can adopt finger cylinders.

Preferably, the conveying member 830 includes a fixing seat 831, a feeding guide rail two 832 and a feeding cylinder two 833, the fixing seat 831 is connected with the feeding guide rail one 820 in a sliding manner, the feeding guide rail two 832 is disposed on the fixing seat 831, the feeding guide rail two 832 is perpendicular to the feeding guide rail one 820, the clamping jaw seat 840 is connected to the feeding guide rail two 832 in a sliding manner, the feeding cylinder two 833 is fixed on the fixing seat 831, and an output end of the feeding cylinder two 833 is connected with the clamping jaw seat 840 and can drive the clamping jaw seat 840 to approach or leave the supporting portion 110.

The clamping mechanism 400 includes a first chuck seat 410, a second chuck seat 420, an upper chuck 430, and a lower chuck 440, wherein the first chuck seat 410 and the second chuck seat 420 are disposed on the slider 200 at intervals along the height direction, the upper chuck 430 is fixed on the first chuck seat 410, the lower chuck 440 is fixed on the second chuck seat 420, and both the lower chuck 440 and the upper chuck 430 can clamp the broach 500. The lower chuck 440 and the upper chuck 430 may both adopt a broach chuck structure used by a vertical broaching machine disclosed in the publication number CN206200578U, or may be common broach chucks in the prior art, and the upper chuck 430 and the lower chuck 440 are driven to operate by separate cylinders.

Preferably, the clamping mechanism 400 further includes a knife feeding assembly 450, the knife feeding assembly 450 includes a second slide rail 451 and a knife feeding cylinder 452, the second slide rail 451 is fixed on the outer end surface of the slide base 200, the first chuck base 410 is slidably connected to the second slide rail 451, the knife feeding cylinder 452 is fixed on one end of the slide base 200 away from the second chuck base 420, and an output end of the knife feeding cylinder 452 is connected to the first chuck base 410 and can push the first chuck base 410 to approach or depart from the second chuck base 420.

Further, an anti-collision assembly 900 is arranged between the output end of the cutter feeding cylinder 452 and the first chuck seat 410, the anti-collision assembly 900 comprises a storage cylinder 910, a connecting block 920, a positioning block 930 and a spring 940, one end of the storage cylinder 910 is fixed with the first chuck seat 410, a storage hole 911 is formed in the storage cylinder 910, a first blocking shoulder 912 is arranged on the hole wall at the upper end of the storage hole 911, and a sliding hole 913 is formed in the side wall of the storage cylinder 910; the outer end of the connecting block 920 extends out of the accommodating hole 911 and is connected with the output end of the cutter feeding cylinder 452, the outer wall of the inner end of the connecting block 920 is provided with a second retaining shoulder 921 capable of being matched with the first retaining shoulder 912, the connecting block 920 is provided with a mounting hole 922, the positioning block 930 is arranged in the mounting hole 922, and the outer end of the positioning block 930 is positioned in the sliding hole 913; the spring 940 is disposed in the receiving hole 911, one end of the spring 940 abuts against the first chuck base 410, and the other end of the spring 940 can abut against the lower end of the connecting block 920.

Further, the connecting block 920 is sleeved with a damping ring 950, and the damping ring 950 is located between the first blocking shoulder 912 and the second blocking shoulder 921, that is, the second blocking shoulder 921 and the first blocking shoulder 912 contact through the damping ring 950.

Preferably, the feeding mechanism 600 includes a third sliding rail 610, a sliding block 620 and a feeding cylinder 630, the third sliding rail 610 is fixed to the supporting portion 110, the sliding block 620 is connected to the third sliding rail 610 in a sliding manner, a first abdicating hole 621 is formed in the sliding block 620, a second clamp 622 is arranged on the sliding block 620, a second abdicating hole 6221 communicated with the first abdicating hole 621 is formed in the second clamp 622, the workpiece 1 has a central hole 1a communicated with the second abdicating hole 6221, and the central hole 1a, the first abdicating hole 621 and the second abdicating hole 6221 can be penetrated by the broach 500; the feeding cylinder 630 is fixed on the supporting portion 110, and an output end of the feeding cylinder 630 is fixedly connected with the slider 620.

Preferably, a first limit stop 624 is fixed on the side wall of the slider 620, a second limit stop 112 is arranged on the support portion 110, the first limit stop 624 slides along with the slider 620 until abutting against the second limit stop 112, and the slider 620 stops sliding, so that the slider 620 can slide to a preset position.

Further, in order to ensure the strength of the support part 110, a third yielding hole 111 coaxial with the broach 500 is formed in the support part 110, and the third yielding hole 111 can be communicated with the first yielding hole 621 and the second yielding hole 6221; the slider 620 is further provided with a fourth abdicating hole 623 which can be communicated with the third abdicating hole 111.

In order to increase the processing efficiency of the workpiece 1 and save energy, the number of the broaching tools 500 corresponds to the number of the upper clamp 430, the lower clamp 440, the first clamp 731, the second clamp 622, the feeding clamp 8411 and the discharging clamp 8421, and at least one pair of the broaching tools is provided.

The working principle of the pull-down broaching machine is as follows:

the workpiece 1 to be machined is placed on the first clamp 731, the feeding cylinder 740 pushes the clamp seat 730 to slide towards the supporting part 110, and the clamp seat 730 is located below the feeding clamping claw 8411;

the feeding cylinder II 833 pushes the clamping jaw seat 840 to slide towards the supporting part 110, so that the feeding clamping jaw 8411 can clamp the workpiece 1 to be machined on the clamp I731, the clamping jaw cylinder I841 drives the feeding clamping jaw 8411 to clamp the workpiece 1 to be machined, the feeding cylinder drives the clamping jaw seat 840 to reset, the feeding cylinder I850 drives the fixing seat 831 to transversely slide, so that the feeding clamping jaw 8411 is located above the clamp II 622, the feeding cylinder II 833 pushes the clamping jaw seat 840 to slide towards the supporting part 110 again, so that the workpiece 1 to be machined is placed on the clamp II 622, the clamping jaw cylinder I841 drives the feeding clamping jaw 8411 to loosen the workpiece 1 to be machined, the workpiece 1 moves upwards along with the output end of the feeding cylinder II 833 and then resets, and feeding of the clamp II 622 is completed;

in the feeding process, the feeding clamping jaw 8421 moves synchronously and works synchronously with the feeding clamping jaw 8411, namely after the feeding clamping jaw 8421 moves synchronously downwards along with the feeding clamping jaw 8411, when the feeding clamping jaw 8411 clamps the workpiece 1 to be processed on the clamp I731, the feeding clamping jaw 8421 also clamps the processed workpiece 1 on the clamp II 622, after the feeding cylinder II 833 drives the clamping jaw seat 840 to reset, the feeding cylinder I850 drives the fixing seat 831 to slide, so that the feeding clamping jaw 8411 is positioned above the clamp II 622, the feeding clamping jaw 8421 is far away from the clamp II 622, after the feeding clamping jaw 8411 loosens the workpiece 1 to be processed, the feeding clamping jaw 8421 also loosens the processed workpiece 1 synchronously, the feeding of the processed workpiece 1 is completed, and the feeding and the discharging are performed synchronously.

After the feeding of the second clamp 622 is finished, the feeding cylinder 630 drives the sliding block 620 to slide towards the direction of the broach 500, and after the first limit stop 624 abuts against the second limit stop 112, the first abdicating hole 621, the second abdicating hole 6221, the third abdicating hole 111 and the central hole 1a in the workpiece 1 are all coaxial with the broach 500, and the workpiece 1 is located below the broach 500, so that the feeding of the workpiece 1 to be machined is finished.

The upper end of the broach 500 is clamped by the upper chuck 430, the tool feeding cylinder 452 drives the first chuck seat 410 and the broach 500 to slide towards the second chuck seat 420, so that the lower end of the broach 500 sequentially passes through the central hole 1a, the second relief hole 6221, the first relief hole 621 and the third relief hole 111, the lower end of the broach 500 is clamped by the lower chuck 440, the upper chuck 430 loosens the upper end of the broach 500, the tool feeding cylinder 452 drives the first chuck seat 410 to slide upwards and reset, and the preparation of the broach 500 is finished;

the driving motor 310 drives the screw 320 to rotate, so that the first chuck seat 410 and the second chuck seat 420 synchronously slide downwards along with the sliding seat 200, the broaching tool 500 broaches the central hole 1a of the workpiece 1 to be machined, after the whole broaching tool 500 passes through the central hole 1a, the broaching of the central hole 1a is completed, the workpiece 1 is the machined workpiece 1, then the feeding cylinder 630 drives the sliding block 620 to reset, and the single feeding and resetting of the feeding mechanism 600 are completed;

after the sliding block 620 is reset, the yielding hole four 623 is communicated with the yielding hole three 111, the yielding hole three 111 and the yielding hole four 623 are coaxial with the broach 500, the driving motor 310 drives the screw rod 320 to rotate reversely, so that the sliding base 200 slides upwards, the upper end of the broach 500 extends out of the yielding hole three 111 and the yielding hole four 623, the tool feeding cylinder 452 drives the first chuck seat 410 to slide towards the second chuck seat 420, the upper chuck 430 clamps the upper end of the broach 500, the lower chuck 440 releases the lower end of the broach 500, then the tool feeding cylinder 452 drives the first chuck seat 410 to slide upwards and reset, and the reset of the broach 500 is completed.

In the process that the tool feeding cylinder 452 pushes the jaw seat 840 to move downwards, if the broach 500 or the jaw seat 840 collides or is hindered by sundries midway, the jaw seat 840 stops moving once, if the output end of the tool feeding cylinder 452 continues to move downwards, the connecting block 920 and the positioning block 930 can only be pushed to integrally slide downwards, the positioning block 930 slides in the sliding hole 913, the connecting block 920 downwards extrudes the spring 940, and the spring 940 buffers the connecting block 920, so that the broach 500 or the jaw seat 410 is not damaged due to collision.

The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims.

Claims (10)

1. A pull-down broaching machine is characterized in that: the broaching machine comprises a bed frame (100), a sliding seat (200), a driving part (300), a clamping mechanism (400), a broaching tool (500) and a feeding mechanism (600), wherein the bed frame (100) is provided with a supporting part (110), the sliding seat (200) is arranged on the bed frame (100) in a sliding manner, the driving part (300) is arranged on the bed frame (100) and can drive the sliding seat (200) to be close to or far away from the supporting part (110), the clamping mechanism (400) is arranged on the sliding seat (200), the clamping mechanism (400) is used for clamping the broaching tool (500), and the feeding mechanism (600) is arranged on the supporting part (110) and is used for driving a workpiece (1) to be close to or far away from the broaching tool (500).

2. The drop down broaching machine according to claim 1, wherein: the broaching machine further comprises a feeding assembly (700) and a feeding assembly (800), wherein the feeding assembly (700) is arranged on the bed frame (100), the feeding assembly (700) is used for feeding workpieces (1) to the feeding assembly (800), and the feeding assembly (800) can feed the workpieces (1) to the feeding mechanism (600) and blanking.

3. The pull-down bench according to claim 2, wherein: the feeding assembly (700) comprises a first fixing frame (710), a feeding guide rail (720), a clamp seat (730) and a feeding cylinder (740), the first fixing frame (710) is connected with the supporting part (110), the feeding guide rail (720) is arranged on the first fixing frame (710), the clamp seat (730) is connected to the feeding guide rail (720) in a sliding mode, a first clamp (731) used for clamping a workpiece (1) is arranged on the clamp seat (730), the feeding cylinder (740) is fixed to the first fixing frame (710), the output end of the feeding cylinder (740) is connected with the clamp seat (730), and the feeding cylinder (740) is used for driving the clamp seat (730) to be close to or far away from the supporting part (110).

4. The pull-down bench according to claim 3, wherein: the feeding assembly (800) comprises a second fixing frame (810), a first feeding guide rail (820), a conveying part (830), a clamping jaw seat (840) and a first feeding cylinder (850), the second fixing frame (810) is connected with the supporting part (110), the first feeding guide rail (820) is arranged on the second fixing frame (810), the conveying part (830) is connected with the first feeding guide rail (820) in a sliding manner, the clamping jaw seat (840) is connected with the conveying part (830) in a sliding manner, the first feeding cylinder (850) is fixed on the second fixing frame (810), the output end of the first feeding cylinder (850) is connected with the conveying part (830) and drives the conveying part (830) to be close to or far away from the feeding assembly (700), the first clamping jaw seat (840) is provided with the first clamping jaw cylinder (841) and the second clamping jaw cylinder (842) at intervals, and the output end of the first clamping jaw cylinder (841) is connected with a feeding clamping jaw (8411), the output end of the clamping jaw cylinder II (842) is connected with a blanking clamping jaw (8421), the feeding clamping jaw (8411) can clamp the workpiece (1) on the clamp I (731), and the blanking clamping jaw (8421) can clamp the workpiece (1) on the feeding mechanism (600).

5. The pull-down bench according to claim 4, wherein: the conveying piece (830) comprises a fixing seat (831), a feeding guide rail II (832) and a feeding cylinder II (833), the fixing seat (831) is connected with the feeding guide rail I (820) in a sliding mode, the feeding guide rail II (832) is arranged on the fixing seat (831), a clamping claw seat (840) is connected with the feeding guide rail II (832) in a sliding mode, the feeding cylinder II (833) is fixed on the fixing seat (831), and the output end of the feeding cylinder II (833) is connected with the clamping claw seat (840) and can drive the clamping claw seat (840) to be close to or far away from the supporting part (110).

6. The drop down broaching machine according to claim 1, wherein: the bed frame (100) is provided with a sliding groove (120), a first sliding rail (121) is arranged in the sliding groove (120), the sliding seat (200) is connected with the first sliding rail (121) in a sliding mode, the driving piece (300) comprises a driving motor (310) and a screw rod (320), the driving motor (310) is fixed on the bed frame (100), the screw rod (320) is located in the sliding groove (120) and connected with the sliding seat (200) in a threaded mode, and the upper end of the screw rod (320) is connected with the output end of the driving motor (310).

7. The drop down broaching machine according to claim 1, wherein: the clamping mechanism (400) comprises a first chuck seat (410), a second chuck seat (420), an upper chuck (430) and a lower chuck (440), the first chuck seat (410) and the second chuck seat (420) are arranged on the sliding seat (200) at intervals along the height direction, the upper chuck (430) is fixed on the first chuck seat (410), the lower chuck (440) is fixed on the second chuck seat (420), and the lower chuck (440) and the upper chuck (430) can clamp the broach (500).

8. The pull-down bench of claim 7, wherein: the clamping mechanism (400) further comprises a cutter feeding assembly (450), the cutter feeding assembly (450) comprises a second sliding rail (451) and a cutter feeding cylinder (452), the second sliding rail (451) is fixed to the outer end face of the sliding seat (200), the first clamping head seat (410) is connected to the second sliding rail (451) in a sliding mode, the cutter feeding cylinder (452) is fixed to the sliding seat (200), and the output end of the cutter feeding cylinder (452) is connected with the first clamping head seat (410) and can push the first clamping head seat (410) to be close to or far away from the second clamping head seat (420).

9. The drop down broaching machine according to claim 8, wherein: an anti-collision assembly (900) is arranged between the output end of the cutter feeding cylinder (452) and the first chuck seat (410), the anti-collision assembly (900) comprises a storage cylinder (910), a connecting block (920), a positioning block (930) and a spring (940), one end of the storage cylinder (910) is fixed with the chuck seat, a storage hole (911) is formed in the storage cylinder (910), a first blocking shoulder (912) is arranged on the hole wall of the upper end of the storage hole (911), and a sliding hole (913) is formed in the side wall of the storage cylinder (910); the outer end of the connecting block (920) extends out of the accommodating hole (911) and is connected with the output end of the cutter feeding cylinder (452), a second blocking shoulder (921) capable of being matched with the first blocking shoulder (912) is arranged on the outer wall of the inner end of the connecting block (920), an installation hole (922) is formed in the connecting block (920), the positioning block (930) is arranged in the installation hole (922), and the outer end of the positioning block (930) is located in the sliding hole (913); the spring (940) is arranged in the accommodating hole (911), one end of the spring (940) abuts against the first chuck seat (410), and the other end of the spring (940) can abut against the lower end of the connecting block (920).

10. The pull-down bench according to claim 2, wherein: the feeding mechanism (600) comprises a third sliding rail (610), a sliding block (620) and a feeding cylinder (630), the third sliding rail (610) is fixed to the supporting portion (110), the sliding block (620) is connected with the third sliding rail (610) in a sliding mode, a first abdicating hole (621) is formed in the sliding block (620), a second clamp (622) is arranged on the sliding block (620), a second abdicating hole (6221) communicated with the first abdicating hole (621) is formed in the second clamp (622), and the workpiece (1) is provided with a center hole (1a) communicated with the second abdicating hole (6221); the feeding air cylinder (630) is fixed on the supporting part (110), and the output end of the feeding air cylinder (630) is fixedly connected with the sliding block (620).

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