CN214236389U

CN214236389U - Inner hexagonal punching machine

Info

Publication number: CN214236389U
Application number: CN202120079050.9U
Authority: CN
Inventors: 吕伟民; 胡葛富; 吴观峰; 倪俊续; 项晓强
Original assignee: Zhejiang Fugang Machine Co ltd
Current assignee: Zhejiang Fugang Machine Co ltd
Priority date: 2021-01-12
Filing date: 2021-01-12
Publication date: 2021-09-21
Anticipated expiration: 2031-01-12

Abstract

The utility model discloses an inner hexagonal piercing press, which comprises a frame, be equipped with the tailstock in the frame and with frame sliding fit's headstock, the headstock is equipped with the main shaft of gyration, be equipped with the ejector pin to work piece one end location on the tailstock, be equipped with the cutter that acts on the work piece other end on the main shaft, the cutter includes front axle, rear axle and the fixed tool bit on the front axle, rear axle and the coaxial fixed connection of main shaft, front axle and rear axle off-centre rotate to arrange, drive when main shaft and rear axle rotate front axle and tool bit produce radial vibration, be equipped with in the frame and drive the headstock to the gliding feeding unit that punches a hole of ejector pin tip direction. The utility model discloses aim at effectively reducing the requirement to equipment, practice thrift manufacturing cost.

Description

Inner hexagonal punching machine

Technical Field

The utility model belongs to the field of the machine tooling punches a hole, especially, relate to an interior hexagonal piercing press.

Background

In the prior art, the hexagon socket is machined by adopting a stamping mode, such as Chinese patent publication No.: CN212190817U, a machine part surface hexagon punch press is disclosed, it can carry out the hexagon socket to the metal parts of different specifications and punch a hole, comprises a workbench, the crossbeam, the diaphragm, the pneumatic cylinder, the piston, the die cutter, baffle and collecting box, workstation bottom four corners is provided with the supporting leg respectively, be connected with the crossbeam between per two sets of supporting legs, be provided with the plummer between two sets of crossbeams, the workstation top is provided with two sets of risers, the riser top all is connected with the diaphragm bottom, the pneumatic cylinder top is connected with the diaphragm bottom through removing to the device, pneumatic cylinder and hydraulic pump connection, pneumatic cylinder bottom and piston top sliding connection, the piston is connected with the die cutter cooperation, workstation top middle part is provided with the hole that falls, two sets of baffles and workstation cooperation sliding connection, the collecting box is located the plummer bottom side, the collecting box is located the hole that falls. The punching machine drives the punching knife to move downwards by outputting power through the hydraulic cylinder of the punching machine, and the punching knife is utilized to punch the inner hexagon of the mechanical part. However, since the processing by the punch requires a large power, the punch has a large volume and the equipment cost and the processing cost are also high.

SUMMERY OF THE UTILITY MODEL

In order to overcome the higher not enough of hexagon socket head cap punching equipment and processing cost among the prior art, the utility model provides a hexagon socket head cap punching machine effectively reduces equipment and manufacturing cost.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an inner hexagonal piercing press, includes the frame, be equipped with the tailstock in the frame and with frame sliding fit's headstock, the headstock is equipped with the main shaft of gyration, be equipped with the ejector pin to work piece one end location on the tailstock, be equipped with the cutter that acts on the work piece other end on the main shaft, the cutter includes front axle, rear axle and the tool bit of fixing on the front axle, the rear axle is with the coaxial fixed connection of main shaft, front axle and rear axle eccentric rotation arrange, drive when main shaft and rear axle rotate front axle and tool bit produce radial vibration, be equipped with in the frame and drive the headstock to the gliding feeding unit that punches a hole of ejector pin tip direction. When the main shaft of the main shaft box drives the cutter, the rear shaft of the cutter and the main shaft keep synchronous rotation, and the front shaft and the rear shaft can rotate relatively, so that when a cutter head of the cutter acts on a prefabricated hole of a workpiece, the front shaft keeps fixed relative to the workpiece, and the rear shaft rotates along with the main shaft. Simultaneously because front axle and rear axle are eccentric arrangement, the rear axle can produce radial effort to the front axle for the tool bit of front axle produces radial vibration, and the cooperation headstock drives the advancing of cutter, realizes feeding of tool bit, thereby the tool bit acts on prefabricated hole and accomplishes the operation of punching a hole to the work piece. Therefore, the requirement on feeding power can be greatly reduced by utilizing the high-frequency eccentric vibration of the cutter head, and continuous processing is facilitated, so that the production efficiency is improved, and the production cost is reduced.

Preferably, the cutter further comprises a shaft sleeve, one end, close to the main shaft, of the shaft sleeve is fixedly connected with the rear shaft, one end, far away from the main shaft, of the shaft sleeve is provided with a shaft sleeve hole, the shaft sleeve hole and the main shaft are arranged in an eccentric mode, the front shaft is arranged in the shaft sleeve hole, and the front shaft and the shaft sleeve hole are in coaxial rotating fit. When the main shaft drives the rear shaft to rotate, the rear shaft also synchronously drives the shaft sleeve to rotate, the front shaft can be reliably positioned through the matching of the eccentric shaft sleeve hole on the shaft sleeve and the front shaft, and the front shaft and the tool bit can be conveniently replaced according to the actual production requirement.

Preferably, rolling bearings matched with the front shaft are arranged at the bottom and the opening of the shaft sleeve hole respectively, a thrust bearing is arranged between the two rolling bearings of the front shaft, and the thrust bearing abuts against the rolling bearings on the two sides. The front shaft is supported by the two rolling bearings, so that the front shaft and the shaft sleeve can rotate smoothly relatively, and the positioning accuracy of the cutter head is ensured. The thrust bearing can bear the axial acting force when the tool bit feeds, and the tool bit is stable and reliable when feeding.

Preferably, a positioning part is arranged in the shaft sleeve hole, the rear shaft abuts against the positioning part, a through hole is formed in the center of the positioning part, the front shaft penetrates through the through hole, and a check ring is arranged at the end part of the front shaft, which penetrates through the through hole. The retaining ring can carry out axial positioning to the front axle, and the front axle keeps relatively fixed with axle sleeve when processing back tool withdrawal, avoids front axle and axle sleeve to take place to break away from.

Preferably, a feeding mechanism is arranged on the rack and comprises a feeding channel for conveying workpieces and a feeding push block positioned at the bottom of the feeding channel, and a feeding cylinder for driving the feeding push block to push the workpiece at the lowest part of the feeding channel to a position between the ejector rod and the cutter is arranged on the rack. When the feeding cylinder pushes the feeding push block out, the feeding push block pushes a workpiece at the lowest part of the feeding channel to a position between the ejector rod and the cutter, so that rapid feeding is realized, and the production efficiency is improved.

Preferably, the feeding channel comprises a first feeding baffle and a second feeding baffle which are arranged in parallel, vertical grooves are formed in opposite surfaces of the first feeding baffle and the second feeding baffle respectively, and feeding guide rails which guide the tops of the vertical grooves are arranged at the tops of the first feeding baffle and the second feeding baffle respectively. The workpieces to be processed can be arranged in parallel along the feeding guide rail and fall into the vertical groove, and the feeding push block is favorable for pushing the workpieces to a processing position one by one.

Preferably, the first feeding baffle is fixedly connected with the rack, the rack is provided with a baffle slide rail in sliding fit with the second feeding baffle, and the distance between the first feeding baffle and the second feeding baffle changes when the second feeding baffle slides on the baffle slide rail. Therefore, the distance between the first feeding baffle and the second feeding baffle is adjustable, and the device has good adaptability to workpieces with different length sizes.

Preferably, the material receiving mechanism is arranged on the rack and comprises a limiting block corresponding to the height of the material loading push block, a sliding hole is formed in the limiting block, a material receiving block in sliding fit is arranged in the sliding hole, a material receiving cylinder for driving the material receiving block to move towards the direction of the material loading push block is arranged on the rack, and a V-shaped material receiving groove is formed in one side, facing the material loading push block, of the material receiving block. When the material loading is carried out, the material receiving cylinder can push out the material receiving block towards the direction of the material loading push block, so that the material receiving block is matched with the material loading push block to clamp and convey a workpiece to a processing position, and the smooth and stable material loading process is ensured.

Preferably, one side of the feeding push block, which faces the limiting block, is provided with a V-shaped material pushing groove, one side of the limiting block, which faces the feeding push block, is provided with a V-shaped limiting groove, and the workpiece is located between the material pushing groove and the limiting groove when the workpiece is clamped by the feeding push block and the limiting block. After the feeding, the material pushing groove of the feeding push block and the limiting groove on the limiting block can automatically center the workpiece and reliably position the workpiece.

The utility model has the advantages that: (1) the cutter performs inner hexagonal punching on the end part of the workpiece by matching eccentric vibration with feeding, so that the punching difficulty is reduced, and the production cost is saved; (2) the workpiece is firmly clamped and positioned, so that the positioning precision of the workpiece in the punching process is ensured; (3) continuous and reliable feeding is realized, and the processing efficiency is improved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the workpiece moving to the bottom of the vertical groove;

FIG. 3 is a schematic structural view of the receiving block during ejection;

FIG. 4 is a schematic structural view of the workpiece after being clamped and positioned according to the present invention;

fig. 5 is a schematic structural diagram of the cutter of the present invention.

In the figure: the automatic feeding device comprises a tailstock 1, a top rod 2, a hand wheel 2a, a material receiving cylinder 3, a limiting block 4, a sliding hole 4a, a limiting groove 4b, a cutter 5, a rear shaft 5a, a shaft sleeve 5b, a front shaft 5c, a cutter head 5d, a tapered roller bearing 51, a thrust bearing 52, a ball bearing 53, a retaining ring 54, a positioning portion 501, a shaft sleeve hole 502, a threaded hole 503, a spindle box 6, a spindle 6a, an oil cylinder 6b, a motor 7, a feeding channel 8, a vertical groove 81, a feeding guide rail 82, a first feeding baffle 8a, a second feeding baffle 8b, a machine head bottom plate 9, a machine head slide rail 10, a workpiece 11, a prefabricated hole 11a, a feeding cylinder 12, a feeding push block 13, a material pushing groove 13a, a baffle slide rail 14, a machine frame 15, a material receiving block 16 and a material receiving groove 16 a.

Detailed Description

The invention is further described with reference to the accompanying drawings and the detailed description.

In the embodiment shown in fig. 1, the inner hexagonal punching machine comprises a frame 15, wherein a tailstock 1 and a spindle box 6 in sliding fit with the frame 15 are arranged on the frame 15, a head bottom plate 9 is arranged at the bottom of the spindle box 6, a head slide rail 10 is arranged on the frame 15, and the head bottom plate 9 is slidably connected to the head slide rail 10. A main shaft 6a is arranged in the main shaft box 6, a motor 7 is arranged at the top of the main shaft box 6, and the motor 7 drives the main shaft 6a of the main shaft box 6 to rotate. The tailstock 1 is provided with an ejector rod 2 for positioning one end of a workpiece 11, the main shaft 6a is provided with a cutter 5 acting on the other end of the workpiece 11, the ejector rod 2 and the tailstock 1 are positioned in a threaded fit mode, the outer end of the ejector rod 2 is provided with a hand wheel 2a, the ejector rod 2 can be driven to move forwards or retreat through rotation of the hand wheel 2a, and therefore the distance between the ejector rod 2 and the cutter 5 is adjusted, and the workpiece 11 with different lengths can be conveniently adapted. The frame 15 is provided with a punching feeding unit, the punching feeding unit in this embodiment is an oil cylinder 6b, and when a piston rod of the oil cylinder 6b is ejected, the main spindle box 6 is driven to slide towards the end of the ejector rod 2 along the machine head slide rail 10.

Referring to fig. 2, a feeding mechanism is disposed on the frame 15, and the feeding mechanism includes a feeding channel 8 for conveying the workpiece 11 and a feeding pusher 13 located at the bottom of the feeding channel 8. The feeding channel 8 comprises a first feeding baffle 8a and a second feeding baffle 8b which are arranged in parallel, vertical grooves 81 are respectively arranged on the opposite surfaces of the first feeding baffle 8a and the second feeding baffle 8b, and feeding guide rails 82 which guide the tops of the vertical grooves 81 are respectively arranged on the tops of the first feeding baffle 8a and the second feeding baffle 8 b. The two ends of the cylindrical workpiece 11 are respectively placed on the feeding guide rails 82 on the two sides, the feeding guide rails 82 are obliquely arranged, and the workpiece 11 can roll into the vertical groove 81 along the feeding guide rails 82 and fall to one side of the feeding push block 13 from the vertical groove 81. First material loading baffle 8a and frame 15 fixed connection are equipped with on frame 15 with second material loading baffle 8b sliding fit's baffle slide rail 14, first material loading baffle 8a and second material loading baffle 8 b's interval change when second material loading baffle 8b slides on baffle slide rail 14. The frame 15 is provided with a feeding cylinder 12, a piston rod of the feeding cylinder 12 is connected with a feeding push block 13, and the feeding cylinder 12 can drive the feeding push block 13 to push the workpiece 11 at the lowest part of the feeding channel 8 to a position between the ejector rod 2 and the cutter 5.

As shown in fig. 3, the frame 15 is provided with a receiving mechanism, the receiving mechanism includes a limiting block 4 corresponding to the height of the feeding push block 13, the limiting block 4 and the frame 15 are fixed, a sliding hole 4a is provided in the limiting block 4, and the opening direction of the sliding hole 4a faces the feeding push block 13. A material receiving block 16 is arranged in the sliding hole 4a, the material receiving block 16 is in sliding fit with the sliding hole 4a, a material receiving cylinder 3 is arranged on the rack 15, a piston rod of the material receiving cylinder 3 is connected with the material receiving block 16, and the material receiving cylinder 3 drives the material receiving block 16 to move towards the direction of the material loading push block 13. A V-shaped material receiving groove 16a is formed in one side, facing the material feeding push block 13, of the material receiving block 16, a V-shaped material pushing groove 13a is formed in one side, facing the limiting block 4, of the material feeding push block 13, and a V-shaped limiting groove 4b is formed in one side, facing the material feeding push block 13, of the limiting block 4. As shown in fig. 4, when the workpiece 11 is clamped by the feeding push block 13 and the limiting block 4, the workpiece 11 is located between the material pushing groove 13a and the limiting groove 4 b. The centers of the material receiving groove 16a, the material pushing groove 13a and the limiting groove 4b are generally arranged at the same height, when the workpiece 11 is positioned, the workpiece 11 is positioned at the center of the groove, and then the height position of the workpiece 11 is hardly changed in the clamping and moving processes, so that the stable conveying of the workpiece 11 is ensured.

As shown in fig. 5, the cutter 5 includes a front shaft 5c, a rear shaft 5a and a cutter head 5d fixed on the front shaft 5c, the rear shaft 5a is coaxially and fixedly connected with the main shaft 6a, the cutter 5 is further provided with a shaft sleeve 5b outside the front shaft 5c and the rear shaft 5a, one end of the shaft sleeve 5b close to the main shaft 6a is provided with a threaded hole 503, and the shaft sleeve 5b is fixedly connected with the rear shaft 5a through the threaded hole 503. One end of the shaft sleeve 5b, which is far away from the main shaft 6a, is provided with a shaft sleeve hole 502, the shaft sleeve hole 502 is eccentrically arranged with the main shaft 6a, the front shaft 5c is arranged in the shaft sleeve hole 502, and the front shaft 5c is coaxially and rotatably matched with the shaft sleeve hole 502. In order to ensure the positioning accuracy between the front shaft 5c and the shaft sleeve 5b and reduce the rotation resistance of the front shaft and the shaft sleeve 5b, rolling bearings matched with the front shaft 5c are respectively arranged at the bottom and the opening of the shaft sleeve hole 502, in this embodiment, the tapered roller bearing 51 is arranged at the bottom of the shaft sleeve hole 502, and the ball bearing 53 is arranged at the opening of the shaft sleeve hole 502. The front axle 5c is provided with a thrust bearing 52 between the two rolling bearings, the thrust bearing 52 abutting against the rolling bearings on both sides, so that the thrust bearing 52 can bear axial forces when the cutter head 5d is stressed. The shaft sleeve hole 502 is internally provided with a positioning part 501, the rear shaft 5a abuts against the positioning part 501, the center of the positioning part 501 is provided with a through hole, the front shaft 5c penetrates through the through hole, and the end part of the front shaft 5c penetrating through the through hole is provided with a retaining ring 54. The front shaft 5c and the rear shaft 5a are disconnected, the torque of the rear shaft 5a is not transmitted to the front shaft 5c, and the main shaft 6a and the rear shaft 5a drive the front shaft 5c and the cutter head 5d to generate radial vibration when rotating due to the eccentric rotating arrangement of the front shaft 5c and the rear shaft 5 a. The eccentric amounts of the front shaft 5c and the rear shaft 5a are designed according to the size of the inner hexagon, when the size of the inner hexagon is smaller, the eccentric amount is correspondingly smaller, and the vibration amplitude of the tool bit 5d is not too large when the cutter 5 feeds so as to ensure the machining precision and protect the tool bit 5 d; when the inner hexagonal dimension is large, the eccentricity amount can be increased appropriately to increase the chip amount of the tool 5.

In the actual operation, as shown in fig. 2, the workpieces 11 move to the vertical groove 81 one by one along the feeding guide rail 82 of the feeding passage 8, and move down vertically along the vertical groove 81 to the side of the pushing groove 13a of the feeding and pushing block 13. At this time, as shown in fig. 3, the material receiving cylinder 3 is started, the piston rod of the material receiving cylinder 3 drives the material receiving block 16 to move towards the material loading push block 13 until the material receiving block 16 contacts with the workpiece 11, and the workpiece 11 is positioned in the material loading slot 13a of the material loading push block 13 and the material receiving slot 16a of the material receiving block 16. As shown in FIG. 4, the piston rod of the feeding cylinder 12 is ejected, and simultaneously the piston rod of the receiving cylinder 3 is retracted, the feeding push block 13 and the receiving block 16 move in the same direction to move the feeding push block 13 between the cutter 5 and the ejector rod 2. When the workpiece 11 moves to contact with the limiting block 4, the workpiece 11 enters the limiting groove 4b of the limiting block 4, and meanwhile, the piston rod of the feeding cylinder 12 exerts acting force on the feeding push block 13 to clamp the workpiece 11 between the pushing groove 13a and the limiting groove 4 b. After the positioning and clamping, the piston rod of the oil cylinder 6b is ejected out, so that the spindle box 6 moves, and the tool bit 5d of the tool 5 contacts the opening of the preformed hole 11a of the workpiece 11. The motor 7 of the spindle box 6 drives the spindle 6a to rotate, the spindle 6a drives the rear shaft 5a to rotate, the front shaft 5c and the tool bit 5d are made to vibrate through the shaft sleeve 5b, the oil cylinder 6b continues to drive the spindle box 6 to move forwards to achieve chip feeding of the tool bit 5d, and the tool bit 5d extrudes the chip prefabricated hole 11a to machine an inner hexagon. Then the oil cylinder 6b drives the main spindle box 6 to move reversely, so that the tool bit 5d is far away from the workpiece 11, and the motor 7 stops rotating. At this time, the feeding cylinder 12 drives the feeding push block 13 to move back, the processed workpiece 11 drops downwards to complete discharging, and meanwhile, the workpiece 11 to be processed at the upper part moves downwards to one side of the material pushing groove 13a of the feeding push block 13, so that feeding and inner hexagon processing operations of the next workpiece 11 can be performed.

Claims

1. An inner hexagon punching machine, comprising a frame (15), characterized in that the frame (15) is provided with a tailstock (1) and a headstock (6) slidably matched with the frame (15). ), the spindle box (6) is provided with a revolving spindle (6a), the tailstock (1) is provided with a top rod (2) for positioning one end of the workpiece, and the spindle (6a) is provided with a A tool (5) at the other end of the workpiece, the tool (5) includes a front shaft (5c), a rear shaft (5a) and a cutter head (5d) fixed on the front shaft (5c), the rear shaft (5a) It is coaxially and fixedly connected with the main shaft (6a), the front shaft (5c) and the rear shaft (5a) are arranged for eccentric rotation, and the main shaft (6a) and the rear shaft (5a) drive the front shaft (5c) and the rear shaft (5a) when they rotate. The cutter head (5d) generates radial vibration, and the frame (15) is provided with a punching feeding unit that drives the spindle box (6) to slide toward the end of the ejector rod (2).

2. The inner hexagon punching machine according to claim 1, wherein the tool (5) further comprises a bushing (5b), the bushing (5b) being close to one end of the main shaft (6a) and the rear axle (5a) Fixed connection, the end of the bushing (5b) away from the main shaft (6a) is provided with a bushing hole (502), the bushing hole (502) is eccentrically arranged with the main shaft (6a), the front axle ( 5c) is arranged in the bushing hole (502), and the front axle (5c) and the bushing hole (502) are coaxially rotatably matched.

3. The inner hexagonal punching machine according to claim 2, wherein the bottom and the opening of the bushing hole (502) are respectively provided with rolling bearings matched with the front axle (5c), and the front axle (502) 5c) A thrust bearing (52) is provided between the two rolling bearings, and the thrust bearing (52) abuts against the rolling bearings on both sides.

4. The inner hexagonal punching machine according to claim 3, wherein a positioning portion (501) is provided in the bushing hole (502), and the rear shaft (5a) is in abutment with the positioning portion (501). By the way, the center of the positioning part (501) is provided with a through hole, the front shaft (5c) passes through the through hole, and the end of the front shaft (5c) passing through the through hole is provided with a retaining ring (54).

5. The inner hexagonal punching machine according to claim 1, wherein a feeding mechanism is provided on the frame (15), and the feeding mechanism comprises a feeding channel ( 8) and a feeding push block (13) located at the bottom of the feeding channel (8), the frame (15) is provided with a driving feeding push block (13) to push the workpiece at the bottom of the feeding channel (8) to the feeding cylinder (12) between the ejector rod (2) and the cutter (5).

6. The inner hexagonal punching machine according to claim 5, wherein the feeding channel (8) comprises a first feeding baffle (8a) and a second feeding baffle (8b) arranged in parallel , the opposite surfaces of the first feeding baffle (8a) and the second feeding baffle (8b) are respectively provided with vertical grooves (81), the first feeding baffle (8a) and the second feeding baffle ( The tops of 8b) are respectively provided with feeding guide rails (82) leading to the tops of the vertical grooves (81).

7. The inner hexagonal punching machine according to claim 6, wherein the first feeding baffle (8a) is fixedly connected to the frame (15), and the frame (15) is provided with a The second feeding baffle (8b) slides with the baffle sliding rail (14), and the first feeding baffle (8a) when the second feeding baffle (8b) slides on the baffle sliding rail (14). ) and the distance between the second feeding baffle (8b) is changed.

8. The inner hexagonal punching machine according to claim 5, 6 or 7, characterized in that, a material receiving mechanism is provided on the frame (15), and the material receiving mechanism comprises a material feeding push block (13) ) a limit block (4) corresponding to the height, the limit block (4) is provided with a sliding hole (4a), and the sliding hole (4a) is provided with a sliding-fit material receiving block (16). The rack (15) is provided with a material receiving cylinder (3) that drives the material receiving block (16) to move in the direction of the upper material pushing block (13), and the material receiving block (16) is directed toward a side of the material feeding push block (13). A V-shaped receiving slot (16a) is provided on the side.

9. The inner hexagonal punching machine according to claim 8, wherein a V-shaped pushing groove (13a) is provided on the side of the feeding push block (13) toward the limit block (4), A V-shaped limit groove (4b) is provided on the side of the limit block (4) facing the feeding push block (13), and the feeding push block (13) and the limit block (4) clamp the workpiece The workpiece is located between the pushing groove (13a) and the limiting groove (4b) when it is tight.