CN112658658A

CN112658658A - Rapid pin pressing device

Info

Publication number: CN112658658A
Application number: CN202011638834.7A
Authority: CN
Inventors: 王强
Original assignee: Kyokuto Die Casting Shanghai Co ltd
Current assignee: Kyokuto Die Casting Shanghai Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-04-16

Abstract

The invention discloses a rapid pin pressing device. The device comprises a press pin assembly and a frame; the pressure pin assembly comprises a pressure cylinder, an upper side guide plate, a fine adjustment pressing block, a floating positioning base, a buffer cylinder, a pin positioning block, a pressure pin block, a steel pin, a heightening pin, a pressure sensor, a connecting piece, a lower side guide plate, a ball screw assembly, a speed reducer and a stepping motor; the pressurizing cylinder is connected with the upper side guide plate, the plurality of buffer cylinders support the floating positioning base below, and the lower side guide plate is connected with the speed reducer and the stepping motor through the ball screw assembly; the bottom of the connecting piece is fixedly connected with the lower side guide plate; the connecting piece is connected with the pin pressing block through the equal-height pin; the pin pressing block is connected with the pin positioning block; the pressure pin block and the pin positioning block are arranged in the floating positioning base, and the steel pin and the heightening pin are arranged in the pin positioning block. The rapid pin pressing device can quickly and precisely press pins into the specified positions of casting products within a certain pin pressing force range, can improve the assembling speed and the assembling quality, and reduces the labor cost.

Description

Rapid pin pressing device

Technical Field

The invention belongs to the technical field of post-processing of die-cast products, and relates to casting post-processing equipment which can quickly and precisely assign positions to products and press pins in a certain pin pressing force range, namely a quick pin pressing device.

Background

Some cast products have a center pin hole and require a pin to be pressed into the center pin hole of the cast product after die casting. For example, as shown in fig. 10, 11, 12, 13, a casting product 50 is a special structural automobile component, and includes a flange ring 53 with a certain thickness (3.5-4mm), three bolt holes 60 (capable of being assembled with other automobile components) are provided on the periphery of the flange ring 53, a cover 55 is provided on the upper portion of the flange ring 53, a ring sleeve 59 is provided on the lower portion of the flange ring 53, two symmetrical circular arc-shaped large openings 52 and a circular arc-shaped small opening 54 are provided on the cover 55, a protruding round block 56 is provided on the center top of the cover 55, the upper end face of the round block 56 is higher than the cover 55 (located on the outer side of the cover 55), and a small screw hole 57 (capable of being installed with other accessories) is provided on the center of the upper end of the round block 56; inside the cover 55 (inside the ring cover 59), a hollow cylinder with an outer diameter smaller than the diameter of the round block 56 is arranged below the round block 56, a small cylinder 58 is arranged inside the hollow cylinder and in the center below the round block 56, a pin hole 51 (in which a steel pin 7 can be inserted) is arranged in the center of the small cylinder 58, and three small partition plates 62 are uniformly divided into three cavities 61 between the small cylinder 58 and the inner wall of the hollow cylinder below the round block 56.

After the casting product 50 is subjected to die-casting processing, a pin (steel pin 7) needs to be pressed into a specified hole (pin hole 51) of the casting product 50 and is in interference fit with the specified hole; further, it is required to press the pin in a range of a constant pin-pressing force (1KN to 6KN) and also to have a requirement for the size of press-fitting, and as shown in fig. 9, it is required that the perpendicularity of the cast product 50, that is, the degree of deviation from the a reference direction, is 0.1mm, the diameter of the steel pin 7 inserted into the cast product 50 is 4mm, and the distance from the a reference to the outer end face of the steel pin 7 after the steel pin 7 is inserted into the cast product 50 is 20.52 ± 0.5 mm.

In order to meet the requirements of customer orders, if pure manual operation is adopted, a large amount of time is needed for positioning and press mounting, the efficiency of the scheme is low, the related size involved in press mounting of the pin cannot be effectively guaranteed, and in addition, whether the force of the press mounting of the pin is within the allowable pressure range (1-6 KN) cannot be known.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides casting post-processing equipment which can quickly and precisely assign positions to products and press pins in a certain pin pressing force range, namely a quick pin pressing device.

The technical scheme of the invention is as follows:

a rapid pin pressing device comprises a pin pressing component and a frame; the press pin assembly is arranged on the frame; the pressure pin assembly comprises a pressure cylinder, an upper side guide plate, a fine adjustment pressing block, a limiting column, a steel pin, a floating positioning base, a pin positioning block, a heightening pin, a workbench, a guide seat, a pressure pin block, a pressure sensor, a buffer cylinder, a connecting piece, a lower side guide plate, a ball screw assembly, a roller bearing, a speed reducer and a stepping motor;

the worktable is horizontally and fixedly arranged at the middle lower part of the frame; a plurality of upright supporting columns are fixedly arranged on the upper surface and the lower surface of the workbench; the pressure cylinder is arranged on the pressure cylinder mounting plate in an inverted mode (the piston rod is downward); the top end (namely the lower end) of a piston rod of the pressure cylinder is connected with the top end (the upper end) of the upper side guide plate; the pressure cylinder mounting plate is horizontally arranged and fixed at the top ends of a plurality of supporting columns on the workbench; the upper side guide plate is horizontally sleeved on the upper parts of a plurality of supporting columns on the workbench; the fine adjustment pressing block component is fixedly arranged below the upper side guide plate by using a screw;

the lower side guide plate is horizontally sleeved at the lower parts of a plurality of supporting columns below the workbench; the lower guide plate is provided with a connecting piece; the bottom of the connecting piece is fixedly connected with the lower side guide plate; the lower mounting plate is horizontally fixed at the bottom ends of a plurality of pillars below the workbench; the roller bearing block is fixedly arranged on the lower mounting plate; the roller bearing is arranged on the roller bearing seat; the middle part of a screw rod of the ball screw component is arranged on the roller bearing; the upper part of a screw of the ball screw component is connected with the lower side guide plate through a ball nut; a stop nut is sleeved outside the lower part of the lead screw of the ball lead screw component; the roller bearing is arranged in the roller bearing seat through a stop nut; the bottom of a lead screw of the ball screw assembly is connected with the speed reducer through the switching assembly; the speed reducer is connected with the stepping motor; the stepping motor base is fixedly arranged below the lower mounting plate;

the floating positioning base is horizontally arranged above the workbench; a plurality of buffer cylinders are fixedly arranged below the bottom of the workbench, piston rods of the buffer cylinders penetrate through the workbench, and the tops of the piston rods prop against the bottom of the floating positioning base; the pin positioning block is arranged in a central hole of the floating positioning base; the pin positioning block is fixedly connected with the pin pressing block through a screw; the steel pin is inserted into the upper part of the central hole of the pin positioning block, and the upper end of the steel pin penetrates out of the hole; the heightening pin is arranged between the pressure pin block and the pin positioning block and is inserted into the lower part in the central hole of the pin positioning block; the limiting column is positioned beside the floating positioning base, and the bottom end of the limiting column is fixedly arranged on the workbench; the ring sleeve (copper sleeve) passes through the central hole of the workbench and is fixed on the workbench; the guide seat is positioned in the ring sleeve (copper sleeve), the top of the guide seat is embedded into a groove at the center of the bottom of the floating positioning base, and the guide seat is fixedly connected with the floating positioning base; the guide seat is hollow, the press pin block is positioned in the guide seat, and a certain gap is reserved between the press pin block and the inner wall of the guide seat; a groove is formed in the center of the bottom of the pressure pin block; the pressure sensor is fixedly connected with a connecting piece below the pressure sensor through a switching bolt; the upper end of the pressure sensor is provided with a pressure sensor connector; the upper end of the pressure sensor connector is designed to be a round head and is inserted into a groove in the center of the bottom of the pressure pin block; the pressure sensor is connected with a control system in the electric cabinet through a signal cable; a plurality of screw holes are uniformly distributed on the top round platform of the connecting piece, each screw hole is provided with an equal-height pin (namely a long bolt column), and the bottom ends of the equal-height pins are screwed into the screw holes; the pressure pin block is also provided with a plurality of through holes corresponding to a plurality of screw holes on the connecting piece, the diameter reduction section at the upper part of the equal-height pin penetrates through the plurality of through holes, the top part of the equal-height pin is connected with the pressure pin block through a screw cap, the screw cap is screwed up, and the screw cap is ensured not to be loosened after installation; a certain gap is left between the reduced diameter section at the upper part of the equal-height pin and the through hole of the pin pressing block, namely, the size of the through hole of the pin pressing block is slightly larger than the diameter of the reduced diameter section at the upper part of the equal-height pin.

Furthermore, an electric cabinet is arranged on the rack, and a control system comprising a PLC is arranged in the electric cabinet; a first signal transceiver for detecting the moving position of the lower guide plate is arranged near the lower guide plate; a second signal transceiver for detecting the moving position of the upper guide plate is arranged near the upper guide plate; an infrared signal detection device for detecting whether casting products on the floating positioning base are placed in place is arranged beside the floating positioning base on the frame; the first signal transceiver, the second signal transceiver and the infrared signal detection device are all connected with the input end of a PLC (programmable logic controller) of a control system in the electric cabinet; the output end of the PLC controller is respectively connected with the pressure cylinder and the stepping motor.

Further, the fine adjustment pressing block comprises a pressing head support, a floating pressing head and a nylon cushion; the pressure head support is a circular ring sleeve, and the top end of the pressure head support is fixedly connected with the lower end of the upper side guide plate through a screw; the floating pressure head and the connecting support are movably connected: the inner wall of the bottom of the pressure head support is provided with an inclined plane protruding inwards, the edge of the upper part of the floating pressure head protrudes outwards and is just embedded on the inclined plane protruding inwards of the pressure head support; the nylon cushion is fixedly arranged at the bottom of the floating pressure head through a screw; the top of the floating pressure head is provided with an upwards convex round head; a cushion block is fixedly arranged at the center of the bottom end of the upper guide plate; the cushion block is positioned above the fine adjustment pressing block.

Further, the ring sleeve is a copper sleeve; the ring sleeve (copper sleeve) penetrates through a center hole of the workbench and is fixed on the workbench through a bolt; the guide seat is fixedly connected with the floating positioning base through bolts.

Furthermore, the section of the heightening pin is in an inverted T shape, and the upper pin of the heightening pin is inserted into the lower part in the central hole of the pin positioning block; the round head at the bottom of the heightening pin is embedded in the central groove at the top of the pin pressing block.

Furthermore, the connecting piece comprises a top circular platform, a bottom flange ring and a middle cylindrical ring sleeve, the bottom flange ring of the connecting piece is fixedly connected with the lower side guide plate through a screw, and a protrusion protruding downwards is arranged on the bottom end of the bottom flange ring of the connecting piece close to the inner side and embedded into a central groove of the lower side guide plate.

Furthermore, the first signal transceiver is provided with three magnetic control signal switches, namely an upper limit magnetic control signal switch, a zero position magnetic control signal switch and a lower limit magnetic control signal switch, which are connected with a control system in the electric cabinet; three magnetic control signal switches of the first signal transceiver are arranged on a vertical thin rod fixed beside (on the left side of) the workbench through a signal switch mounting plate and are positioned near a lower side guide plate; the upper end and the lower end of the vertical thin rod are respectively connected and fixed with the workbench and the lower mounting plate. The zero magnetic control signal switch in the first signal transceiver is positioned near the initial position of the lower side guide plate, the upper limit magnetic control signal switch is positioned at a point (the side of the initial position of the connecting piece) above the initial position of the lower side guide plate, and the lower limit magnetic control signal switch is positioned at a point below the initial position of the lower side guide plate.

Furthermore, two magnetic control signal switches, namely an upper limit magnetic control signal switch and a zero magnetic control signal switch, are arranged on the second signal transceiver and are connected with a control system in the electric cabinet; two magnetic control signal switches of the second signal transceiver are arranged on a vertical thin rod fixed beside the workbench and positioned near the upper side guide plate; the upper end and the lower end of the vertical thin rod are respectively connected and fixed with the pressure cylinder mounting plate and the workbench; the zero magnetic control signal switch in the second signal transceiver is positioned near the initial position of the upper side guide plate, and the upper limit magnetic control signal switch is positioned at a point above the initial position of the upper side guide plate.

Furthermore, starting buttons are arranged on two sides in front of the pin pressing assembly on the rack, and a stopping button is arranged on one side of the pin pressing assembly; and two grating detection devices are respectively arranged on two sides of the press pin component on the rack and are connected with the input end of a PLC (programmable logic controller) of a control system in the electric cabinet.

Furthermore, the lower part of the piston rod of the pressure cylinder is screwed into the floating joint but not screwed to the bottom, and a certain gap is reserved between the bottom end of the piston rod of the pressure cylinder and the transition plate below the floating joint sleeve and the floating joint sleeve; a floating joint sleeve is sleeved outside the floating joint; a transition plate is arranged below the floating joint and the floating joint sleeve; two long-strip-shaped transition blocks with square sections are respectively arranged on two sides below the transition plate; the floating joint sleeve is fixedly connected with the transition plate through a screw; the transition plate and the strip-shaped transition block are fixedly connected with the upper side guide plate through screws; a certain gap is left between the floating joint and the floating joint sleeve; the bottom end of a piston rod of the pressure cylinder is connected with the upper guide plate through a transition plate and two strip-shaped transition blocks.

The invention has the beneficial effects that:

the rapid pin pressing device can rapidly and precisely press the pin into the specified position (the middle pin hole) of the casting product within a certain pin pressing force range, can reduce the labor cost, and improves the assembly speed and the assembly quality.

The adjustable connecting structure between the equal-height pin and the pin pressing block is designed (a certain gap is reserved between the equal-height pin and the through hole of the pin pressing block), the structure can effectively avoid the problem that the pin pressing block, the pin positioning block assembly and the floating positioning base are clamped due to eccentric dislocation of the upper part and the lower part of the rapid pin pressing device caused by part machining and assembly errors, and can ensure rapid and smooth operation of the pin pressing action.

The invention also designs the simple self-adaptive structure of the fine-tuning pressing block, the floating pressure head and the nylon cushion of the fine-tuning pressing block can adjust the pressure direction according to the upper side state of a casting product, so that the product can be stably fixed on the floating positioning base, the pin can be smoothly and safely pressed into the product, and the precision of the assembly size of the product can be ensured.

By using the rapid pin pressing device, the pin can be smoothly and safely pressed into a product, the related assembly size (pin insertion depth) of the product is ensured, the assembly quality is stabilized, meanwhile, the production efficiency is promoted, and the labor cost is reduced.

Drawings

FIG. 1 is a schematic structural view of a rapid pin pressing device according to the present invention;

FIG. 2 is a schematic view of the overall construction of the press pin assembly of the present invention;

FIG. 3 is a schematic structural view of the upper part I of the press pin assembly of the present invention;

FIG. 4 is a schematic view of the construction of the middle section II of the press pin assembly of the present invention;

FIG. 5 is a schematic structural view of the lower portion III of the press pin assembly of the present invention;

FIG. 6 is an enlarged schematic structural view of the fine tuning compact 5 and the spacer 4 of the present invention;

fig. 7 is a schematic diagram of three magnetic control signal generators on the first signal transceiver device 31 in the present invention;

fig. 8 is a schematic diagram of two magnetic control signal generators on the second signal transceiver device 32 in the present invention;

FIG. 9 is a schematic illustration of the press pin sizing requirements of the present invention;

fig. 10-13 are schematic views of the structure of the cast product 50 of the present invention.

In the figure: 1. the device comprises a pressure cylinder 2, a pressure cylinder mounting plate 3, an upper guide plate 4, a cushion block 5, a fine-adjustment pressing block 501, a pressure head support 502, a floating pressure head 503, a nylon cushion 6, a limiting column 7, a steel pin 8, a floating positioning base 9, a pin positioning block 10, a heightening pin 11, a workbench 12, a guide seat 13, a copper sleeve 14, a press pin block 15, a pressure sensor connector 16, a pressure sensor 17, a buffer cylinder 18, a switching bolt 20, a connector 201, a top circular table 202, a middle cylindrical ring sleeve 203, a bottom flange ring 21, a lower guide plate 22, a ball screw assembly 23, a roller bearing seat 24, a roller bearing 25, a stop nut 26, a lower mounting plate 27, a stepping motor seat 28, a switching assembly 29, a speed reducer 30, a stepping motor 31, a first signal transceiver 311, a first signal receiver-transmitter-, An upper limit magnetic control signal switch 312, a zero position magnetic control signal switch 313, a lower limit magnetic control signal switch 32, a second signal transceiver 321, an upper limit magnetic control signal switch 322, a zero position magnetic control signal switch 33, a support 34, a vertical thin rod 35, a support 36, a vertical thin rod 37, an equal height pin 38, an infrared signal detection device 39, a signal cable 40, a frame 41, a press pin assembly 42, a start button 43, a stop button 44, a grating detection device 45, an electric cabinet 50, a casting product 51, a pin hole 52, a circular arc-shaped large opening hole 53, a flange ring 54, a circular arc-shaped small opening hole 55, a cover cap 56, a round block 57, a small screw hole 58, a cylinder 59, a ring sleeve 60, a bolt hole 61, a cavity 62, a small partition plate 71, a transition plate 72, a floating joint 73, a floating joint sleeve 74, a strip, Voids

Detailed Description

The invention is further described below with reference to the following figures and examples.

Example 1

As shown in fig. 1, the present invention relates to a fast pin pressing device, which comprises a pin pressing assembly 41, a frame 40; the press pin assembly 41 is mounted at an intermediate position on the frame 40. An electric cabinet 45 is arranged at the bottom of the frame 40, and a control system is arranged in the electric cabinet 45. On the frame 40, a start button 42 is provided at both sides in front of the press pin assembly 41, and a stop button 43 is provided at one side. A grating detection device 44 is respectively arranged on the two sides of the press pin assembly 41 on the machine frame 40. An infrared signal detection device 38 for detecting whether the casting product 50 on the floating positioning base 8 is put in place is arranged at the side of the press pin assembly 41 on the machine frame 40 (i.e. the side of the casting product 50 on the upper part of the floating positioning base 8). A first signal transmitter/receiver 31 for detecting the moving position of the lower guide plate 21 is provided near the lower guide plate 21 of the press pin assembly 41. A second signal transmitting/receiving device 32 for detecting the moving position of the upper guide plate 3 is provided near the upper guide plate 3 of the press pin unit 41. The first signal transceiver 31, the second signal transceiver 32, the infrared signal detection device 38 and the grating detection device 44 are all connected with the input end of a PLC (programmable logic controller) of a control system in the electric cabinet 45; the output end of the PLC controller is respectively connected with the pressure cylinder 1 and the stepping motor 30.

An operation panel is also provided to set a range of a pin-pressing force (1KN to 6KN) for pressing the pin.

The detailed structure of the press pin assembly is shown in detail in figures 2-6.

As shown in fig. 2 to 5, the press pin assembly 41 includes a pressure cylinder 1, a pressure cylinder mounting plate 2, an upper guide plate 3, a cushion block 4, a fine adjustment pressing block 5, a limit post 6, a steel pin 7, a floating positioning base 8, a pin positioning block 9, a heightening pin 10, a workbench 11, a guide base 12, a copper bush 13, a press pin block 14, a pressure sensor connector 15, a pressure sensor 16, a cushion cylinder (spring) 17, an adapter bolt 18, a connector 20, a lower guide plate 21, a ball screw assembly 22, a roller bearing base 23, a roller bearing 24, a stop nut 25, a lower mounting plate 26, a stepping motor base 27, an adapter assembly 28, a reducer 29, a stepping motor 30, and the like.

As shown in fig. 2, the table 11 is horizontally and fixedly installed at a middle-lower position on the frame 40; four vertical supporting columns 33 are fixedly arranged at four corners on the upper surface of the workbench 11; four vertical supporting columns 35 are fixedly arranged at four corners below the workbench 11; a pressure cylinder mounting plate 2 and an upper side guide plate 3 are horizontally arranged on four supporting columns 33 on the workbench 11 from top to bottom; the lower guide plate 21 and the lower mounting plate 26 are horizontally mounted from top to bottom on four pillars 35 below the table 11.

As shown in fig. 3, the booster cylinder 1 is mounted upside down on the booster cylinder mounting plate 2; the lower part of the piston rod of the pressure cylinder 1 is screwed into the floating joint 72 (in threaded connection) but not screwed to the bottom, and a certain gap 75 is reserved between the bottom end of the piston rod of the pressure cylinder 1 and the transition plate 71 below the floating joint 72 and the floating joint sleeve 73; a floating joint sleeve 73 is sleeved outside the floating joint 72; a transition plate 71 is propped against the lower surfaces of the floating joint 72 and the floating joint sleeve 73; two long-strip-shaped transition blocks 74 with square sections are respectively arranged on two sides below the transition plate 71; the floating joint sleeve 73 is fixedly connected with the transition plate 71 through a screw; the transition plate 71 and the strip-shaped transition block 74 are fixedly connected with the upper side guide plate 3 through screws; a certain gap is left between the floating joint 72 and the floating joint sleeve 73; the bottom end of the piston rod of the pressure cylinder 1 is connected with the upper side guide plate 3 through a transition plate 71 and two strip-shaped transition blocks 74. The gap 75 between the bottom end of the piston rod of the pressure cylinder and the transition plate 71 is designed, and the floating joint 72, the floating joint sleeve 73, the transition plate 71 and the two strip-shaped transition blocks 74 are arranged, so that the stress area is increased, the pressure is dispersed, the thrust of the piston rod of the pressure cylinder can be uniformly distributed on the upper guide plate 3, and the plastic deformation caused by the long-term local large stress of the upper guide plate 3 due to the ejecting force of the piston rod of the pressure cylinder 1 is prevented. The clearance (assembly clearance) between the floating joint 72 and the floating joint sleeve 73 is designed to accommodate the axis dislocation within a certain range caused by the processing and assembly errors of the upper guide plate, the upper mounting plate, the floating joint sleeve, the transition plate and the strip-shaped transition block, so that the upper guide plate can stably move after being acted by the pressure cylinder and a casting product can be stably fixed on the floating positioning base. The pressure cylinder mounting plate 2 is horizontally arranged and fixed at the top ends of the four supporting columns 33; the upper guide plate 3 is horizontally sleeved on the upper parts of the four supporting columns 33; two ends of the fine adjustment pressing block 5 are fixedly arranged below the upper guide plate 3 through screws; after the pressure cylinder 1 pushes the upper guide plate 3 to move downwards to a proper position, the fine adjustment pressing block 5 can be contacted with the upper side surface, namely the top surface, of the casting product 50, and the pressure direction of the pressed steel pin 7 can be adjusted according to the state of the upper side surface of the casting product 50; cushion 4 fixed mounting plays limiting displacement to 5 tops of fine setting compact heap in the bottom central point of upper guide plate 3.

As shown in fig. 6, the fine tuning pressing block 5 comprises a pressing head support 501, a floating pressing head 502 and a nylon cushion 503; the pressure head support 501 is a circular sleeve, and the top end of the pressure head support is fixedly connected with the lower end of the upper guide plate 3 through a screw; the floating pressure head 502 is movably connected with the connecting bracket 501: the inner wall of the bottom of the pressure head support 501 is provided with an inclined plane protruding inwards, the upper edge of the floating pressure head 502 protrudes outwards and is just embedded on the inclined plane protruding inwards of the pressure head support 501; the nylon pad 503 is fixedly mounted on the bottom of the floating ram 502 by screws. The top of the floating ram 502 has an upwardly projecting rounded head that abuts the pad 4. The fine tuning pressing block 5 is a simple self-adaptive structure, and the floating pressing head 502 and the nylon cushion 503 of the fine tuning pressing block 5 can adjust the pressure direction according to the upper side state of the casting product 50.

As shown in fig. 5, the lower guide plate 21 is horizontally fitted over the lower portions of the four pillars 35; the lower guide plate 21 is provided with a connecting piece 20; the connecting piece 20 comprises a top circular truncated cone 201, a bottom flange ring 203 and a middle cylindrical ring sleeve 202, the bottom flange ring 203 of the connecting piece 20 is fixedly connected with the lower side guide plate 21 through screws, and a downward protruding bump is arranged at the bottom end of the bottom flange ring 203 of the connecting piece 20 close to the inner side and is embedded into a central groove of the lower side guide plate 21; the lower mounting plate 26 is horizontally fixed at the bottom ends of the four pillars 35; the roller bearing seat 23 is fixedly arranged on the lower mounting plate 26; the middle part of the ball screw assembly 22 is arranged on a roller bearing 24; the upper part of the ball screw assembly 22 is connected with the lower guide plate 21 through a ball nut; a stop nut 25 is sleeved outside the lower part of the ball screw component 22; the roller bearing 24 is installed in the roller bearing seat 23 through a stop nut 25; the bottom of the ball screw assembly 22 is connected with a reducer 29 through an adapter assembly 28; the reducer 29 is connected with a stepping motor 30; the stepper motor mount 27 is fixedly mounted below the lower mounting plate 26.

As shown in fig. 4, the floating positioning base 8 is horizontally installed above the table 11; three buffer cylinders 17 (equivalent to the action of springs) are uniformly and fixedly arranged at the bottom end of the workbench 11, piston rods of the buffer cylinders 17 penetrate through the workbench 11, and the top ends of the piston rods prop against the bottom of the floating positioning base 8; the pin positioning block 9 is arranged in a central hole of the floating positioning base 8; the pin positioning block 9 is fixedly connected with the pin pressing block 14 through a screw; the steel pin 7 is inserted into the upper part of the central hole of the pin positioning block 9, and the upper end of the steel pin penetrates out of the hole; the heightening pin 10 is arranged between the press pin block 14 and the pin positioning block 9, the section of the heightening pin is inverted T-shaped, and an upper pin of the heightening pin 10 is inserted into the lower part of a central hole of the pin positioning block 9 to play a role of propping and heightening the steel pin 7; the round head at the bottom of the heightening pin 10 is embedded in a central groove at the top of the press pin block 14; the limiting column 6 is positioned beside the floating positioning base 8, and the bottom end of the limiting column is fixedly arranged on the workbench 11; the copper bush 13 passes through the center hole of the workbench and is fixed on the workbench 11 by bolts; the guide seat 12 is positioned inside the copper sleeve 13, the top of the guide seat 12 is embedded into a groove in the center of the bottom of the floating positioning base 8, and the guide seat 12 and the floating positioning base 8 are fixedly connected through bolts; the guide seat 12 is hollow, the press pin block 14 is arranged in the guide seat 12, and a certain gap is reserved between the press pin block 14 and the inner wall of the guide seat 12 for adjusting the pressure direction; a groove is formed in the center of the bottom of the press pin block 14; the pressure sensor 16 is fixedly connected with a connecting piece 20 below the pressure sensor through a transfer bolt 18; the upper end of the pressure sensor 16 is provided with a pressure sensor connector 15; the upper end of the pressure sensor connector 15 is designed to be a round head and is inserted into a groove in the center of the bottom of the pressure pin block 14; the pressure sensor 16 is connected with a control system in the electric cabinet 45 through a signal cable 39; three screw holes are uniformly distributed on the top round platform 201 of the connecting piece 20, and the bottom ends of the three equal-height pins 37 are screwed into the three screw holes (fixedly connected by threads); the pressure pin block 14 is also provided with three through holes corresponding to three screw holes on the connecting piece 20, a reduced diameter section at the upper part of the three equal-height pins 37 (namely long bolt columns) passes through the three through holes, the tops of the equal-height pins 37 are connected with the pressure pin block 14 through nuts, the nuts are screwed, the nuts are guaranteed not to be loosened after installation, and the axis of the pressure pin block 14 and the axis of the pressure sensor connector 15 are allowed to be dislocated in the pressure pin process (a gap of about 0.35mm is reserved between the reduced diameter section at the upper part of the equal-height pins 37 and the through holes of the pressure pin block 14, namely, the size of the through holes of the pressure pin block 14 is about 0.35mm larger than the diameter of the reduced diameter section at the upper. The structure (assembly clearance) is designed, so that the problems that the pin positioning block 9 and the pin pressing block 14 assembly vibrate or are blocked with the floating positioning base 8 when the pin positioning block 9 and the pin pressing block 14 assembly are subjected to the pressing force of the pressure sensor connector 15 dislocated with the axis due to eccentric dislocation caused by part processing and assembly errors of the floating positioning base 8, the pin positioning block 9 and the pin pressing block 14 assembly on the workbench 11 of the rapid pin pressing device and parts below the workbench 11 can be effectively avoided; otherwise, the part (a certain area on the cylindrical surface) of the assembly of the press pin block 14 and the pin positioning block 9, which is in contact with the floating positioning base 8, will always have friction, resulting in excessive wear of the matching surface of the part, and in this way, the press pin device will vibrate, block and the like when moving the guide plate, and finally the casting product produced by the device will probably not meet the drawing requirements (quality loss). The connecting member 20 may push the steel pin 7 into the pin hole 51 in the center of the inner side of the cast product 50 together with other components such as the lower guide plate 21, the pressure sensor 16, the pressure sensor connector 15, the press pin block 14, and the pin positioning block 9.

As shown in fig. 7, the first signal transceiver 31 is provided with three magnetic control signal switches (magnetic control signal generators), namely, an upper limit magnetic control signal switch 311 (an upper limit magnetic signal controller), a zero magnetic control signal switch 312 (a zero magnetic signal controller), and a lower limit magnetic control signal switch 313 (a lower limit magnetic signal controller), which are all connected to the control system in the electric cabinet 45.

As shown in fig. 1 and 4, the three magnetic control signal switches of the first signal transceiver 31 are mounted on a vertical thin rod 36 fixed to the lower side (left side) of the table 11 via a signal switch mounting plate, and are located near the lower guide plate 21. The upper and lower ends of the vertical thin rod 36 are respectively connected and fixed with the workbench 11 and the lower mounting plate 26. The upper limit magnetic control signal switch 311 in the first signal transceiver 31 is located beside the connecting element 20, the zero magnetic control signal switch 312 is located near the initial position of the lower side guide plate 21, and the lower limit magnetic control signal switch 313 is located at a point below the initial position of the lower side guide plate 21.

As shown in fig. 8, the second signal transceiver 32 is provided with two magnetic control signal switches (magnetic control signal generators), namely an upper limit magnetic control signal switch 321 (upper limit magnetic signal controller) and a zero magnetic control signal switch 322 (zero magnetic signal controller), which are connected to the control system in the electric cabinet 45.

As shown in fig. 1, the two magnetic control signal switches of the second signal transceiver 32 are mounted on a vertical thin rod 34 fixed on the upper side (right side) of the table 11 and located near the upper guide plate 3. The upper end and the lower end of the vertical thin rod 34 are respectively connected and fixed with the pressure cylinder mounting plate 2 and the workbench 11. The zero position magnetic control signal switch 322 in the second signal transceiver 32 is located near the initial position of the upper side guide plate 3, and the upper limit magnetic control signal switch 321 is located slightly above the initial position of the upper side guide plate 3.

The working principle and the action process of pressing the pin by using the rapid pin pressing device are as follows:

an operator firstly puts the steel pin 7 into a central hole of a pin positioning block 9 in the press pin assembly and confirms that the steel pin is put in place; then the casting product 50 is placed on the floating positioning base 8 (the three buffer cylinders 17 below the floating positioning base 8 play a role of springs), and the placement in place is confirmed; then, the operator presses the start buttons 42 on both sides of the apparatus with both hands simultaneously, and the infrared signal detection device 38 located in front of the press pin position feeds back a signal to the electric cabinet 45 and counts +1 when detecting that the cast product 50 is loaded. At this time, the electric cabinet 45 controls the starting of the pressure cylinder 1, pushes the upper guide plate 3 downwards, and stops moving after the upper guide plate 3 contacts with the top end of the limiting column 6 fixed on the workbench 11. At this time, the floating pressure head 52 of the fine adjustment pressing block 5 on the upper guide plate 3, with the help of the cushion block 4, causes the nylon cushion 53 to adjust the pressure direction according to the upper side state of the casting product 50, and fixes the casting product 50 on the floating positioning base 8 in the press pin assembly (the fine adjustment pressing block 5 is in contact with the upper side, i.e. the top surface, of the casting product 50);

at this time, the electric cabinet 45 controls the forward output (forward rotation) of the stepping motor 30, the power is transmitted to the ball screw assembly 22 through the speed reducer 29 and the switching assembly 28, the lower side guide plate 21 is pushed to move upwards, the connecting piece 20, the pressure sensor 16, the pressure sensor connector 15 and the three uniformly distributed equal-height pins 37 are driven to push the pressure pin block 14 and the pin positioning block 9 together to eject the steel pin 7 to a specified position (the steel pin 7 is pressed into a pin hole 51 in the center of the inner side of the casting product 50); through the assembly clearance between the pressure pin block 14 and the equal-height pin 37, the pin positioning block 9 and the pressure pin block 14 assembly cannot generate the problems of vibration, clamping and the like after the matched cylindrical surface is abraded due to frequent friction with the floating positioning base 8 in a certain area when the pin positioning block 9 and the pressure pin block 14 assembly are subjected to the pressing force dislocated with the axis within a certain range.

In the pressing-in process, the pressure sensor 16 can monitor the magnitude of the pressing-in force in real time; when the press-in force exceeds a set range (1 KN-6 KN), the pressure sensor 16 informs the electric cabinet 45 through a signal cable to control equipment to send out audible and visual alarm, the press pin action of the whole press pin assembly is suspended, and then the quick reset is carried out to an initial state, and the casting product 50 related to the alarm needs to be taken out by a worker and then is scrapped;

if the pressing force is not abnormal (within the set range of 1-6 KN), the pressing pin of the whole pressing pin assembly moves in place at the moment, an upper limit magnetic control signal switch 311 in the first signal transceiver 31 detects that the lower side guide plate 21 rises to a corresponding position and then sends a signal to the electric cabinet 45, and the electric cabinet 45 controls the stepping motor 30 (the speed reducer 29 and the ball screw assembly 22) to stop rotating so that the pressing pin assembly stops moving; then, the electric cabinet 45 controls the stepping motor 30 (and the speed reducer 29 and the ball screw assembly 22) to rotate reversely, controls the lower guide plate 21 and the assemblies connected with the lower guide plate (including the connecting piece 20, the pressure sensor 16, the pressure sensor connector 15, the three uniformly distributed equal-height pins 37, the press pin block 14 and the pin positioning block 9) to start to move back and forth rapidly, and when the lower guide plate returns to the pre-press-pin state (the lower guide plate 21 is reset to the initial position), the zero position magnetic control signal switch 312 in the first signal transceiver 31 closest to the lower guide plate 21 feeds back the in-place signal of the lower guide plate 21 to the electric cabinet 45, and controls the stepping motor 30 (and the speed reducer 29 and the ball screw assembly 22) to stop rotating by the electric cabinet 45, so that the lower guide plate 21 stops moving back; at this time, the electric cabinet 45 controls the pressure cylinder 1 to rapidly pull back the upper guide plate 3, when the upper guide plate 3 moves back upward to a pre-pinning state (the upper guide plate 3 is reset to an initial position), the zero position magnetic control signal switch 322 in the second signal transceiver 32 detects that the upper guide plate 3 closest to the upper guide plate 3 moves in place, and feeds back the in-place signal of the upper guide plate 3 to the electric cabinet 45, and the electric cabinet 45 controls the pressure cylinder 1 to pause in motion, so that the upper guide plate 3 stops moving back. At this time, the whole equipment stops operating, and the operator can take the cast product 50 which is pressed and pinned on the floating positioning base 8.

The upper limit magnetic control signal switch 311 and the lower limit magnetic control signal switch 313 in the first signal transceiver 31 and the upper limit magnetic control signal switch 321 in the second signal transceiver 32 are used when an accident occurs in manual operation of an operator or automatic operation of equipment, so that the equipment is prevented from being damaged due to the fact that the equipment is operated beyond a range.

The above is one beat, and the time is less than 30 s. The removed cast product 50 is determined to be satisfactory and then flows to the next step. If the stamped casting product 50 is not satisfactory, the equipment needs to be notified for maintenance and adjustment.

Subsequently, the operator can repeat the above steps for continuous production work. In a single beat, the grating detection device 44 can detect the blockage between the two grating detection devices 44 of the equipment and emergently suspend the equipment to protect the personal safety of operators; the operator may also press the stop button 43 in an emergency to protect the equipment and to protect the operator's personal safety in the event of an accident.

The rapid pin pressing device can rapidly and precisely press the pin into the specified position (the middle pin hole) of a casting product within a certain pin pressing force range (1 KN-6 KN). By using the rapid pin pressing device, the pin can be smoothly and safely pressed into a product, the assembly speed and the assembly quality are improved, the relevant assembly size of the product is ensured, the improvement of the production efficiency is promoted while the assembly quality is stabilized, and the labor cost is reduced.

The quick pin pressing device is suitable for quick pin pressing of various products with middle pin holes and pins needing to be pressed in. For products with different shapes from the casting product 50 in the invention, the proper floating positioning base 8 and the fine adjustment pressing block 5 are replaced (the size of the casting product 50 cannot exceed the size of the floating positioning base 8). The press-fit force required for the cast product 50 in the invention is in the range of 1KN to 6 KN. For other products with different requirements on the press-in force, the press-in force range can be adjusted and set to the required pressure value.

Claims

1. A rapid pin pressing device is characterized by comprising a pin pressing component and a rack, wherein the pin pressing component is arranged on the rack; the pressure pin assembly comprises a pressure cylinder, an upper side guide plate, a fine adjustment pressing block, a limiting column, a steel pin, a floating positioning base, a pin positioning block, a heightening pin, a workbench, a guide seat, a pressure pin block, a pressure sensor, a buffer cylinder, a connecting piece, a lower side guide plate, a ball screw assembly, a roller bearing, a speed reducer and a stepping motor;

the worktable is horizontally and fixedly arranged at the middle lower part of the frame; a plurality of upright supporting columns are fixedly arranged on the upper surface and the lower surface of the workbench; the pressure cylinder is arranged on the pressure cylinder mounting plate in an inverted manner; the lower end of a piston rod of the pressure cylinder is connected with the top end of the upper side guide plate; the pressure cylinder mounting plate is horizontally arranged and fixed at the top ends of a plurality of supporting columns on the workbench; the upper side guide plate is horizontally sleeved on the upper parts of a plurality of supporting columns on the workbench; two ends of the fine tuning compression block are fixedly arranged below the upper side guide plate through screws;

the lower side guide plate is horizontally sleeved at the lower parts of a plurality of supporting columns below the workbench; the lower guide plate is provided with a connecting piece; the bottom of the connecting piece is fixedly connected with the lower side guide plate; the lower mounting plate is horizontally fixed at the bottom ends of a plurality of pillars below the workbench; the roller bearing block is fixedly arranged on the lower mounting plate; the roller bearing is arranged on the roller bearing seat; the middle part of a screw rod of the ball screw component is arranged on the roller bearing; the upper part of a screw of the ball screw component is fixedly connected with the lower side guide plate through a ball nut; a stop nut is sleeved outside the lower part of the lead screw of the ball lead screw component; the roller bearing is arranged in the roller bearing seat through a stop nut; the bottom of a lead screw of the ball screw assembly is connected with the speed reducer through the switching assembly; the speed reducer is connected with the stepping motor; the stepping motor base is fixedly arranged below the lower mounting plate;

the floating positioning base is horizontally arranged above the workbench; a plurality of buffer cylinders are fixedly arranged below the bottom of the workbench, piston rods of the buffer cylinders penetrate through the workbench, and the tops of the piston rods prop against the bottom of the floating positioning base; the pin positioning block is arranged in a central hole of the floating positioning base; the pin positioning block is fixedly connected with the pin pressing block through a screw; the steel pin is inserted into the upper part of the central hole of the pin positioning block, and the upper end of the steel pin penetrates out of the hole; the heightening pin is arranged between the pressure pin block and the pin positioning block and is inserted into the lower part in the central hole of the pin positioning block; the limiting column is positioned beside the floating positioning base, and the bottom end of the limiting column is fixedly arranged on the workbench; the ring sleeve penetrates through a central hole of the workbench and is fixed on the workbench; the guide seat is positioned inside the loop; the top of the guide seat is embedded into a groove in the center of the bottom of the floating positioning base, and the guide seat is fixedly connected with the floating positioning base; the guide seat is hollow, the press pin block is positioned in the guide seat, and a certain gap is reserved between the press pin block and the inner wall of the guide seat; a groove is formed in the center of the bottom of the pressure pin block; the pressure sensor is fixedly connected with a connecting piece below the pressure sensor through a switching bolt; the upper end of the pressure sensor is provided with a pressure sensor connector; the upper end of the pressure sensor connector is designed to be a round head and is inserted into a groove in the center of the bottom of the pressure pin block; the pressure sensor is connected with a control system in the electric cabinet through a signal cable; a plurality of screw holes are uniformly distributed on the top round platform of the connecting piece, each screw hole is internally provided with an equal-height pin, and the bottom ends of the equal-height pins are screwed into the screw holes; the pressure pin block is also provided with a plurality of through holes corresponding to a plurality of screw holes on the connecting piece, the diameter reduction section at the upper part of the equal-height pin penetrates through the through holes, and the top part of the equal-height pin is connected with the pressure pin block through a screwed nut; a certain gap is left between the reduced diameter section at the upper part of the equal-height pin and the through hole of the pin pressing block, namely, the size of the through hole of the pin pressing block is slightly larger than the diameter of the reduced diameter section at the upper part of the equal-height pin.

2. The rapid pin pressing device according to claim 1, wherein an electric cabinet is arranged on the frame, and a control system comprising a PLC controller is arranged in the electric cabinet; a first signal transceiver for detecting the moving position of the lower guide plate is arranged near the lower guide plate; a second signal transceiver for detecting the moving position of the upper guide plate is arranged near the upper guide plate; an infrared signal detection device for detecting whether casting products on the floating positioning base are placed in place is arranged beside the floating positioning base on the frame; the first signal transceiver, the second signal transceiver and the infrared signal detection device are all connected with the input end of a PLC (programmable logic controller) of a control system in the electric cabinet; the output end of the PLC controller is respectively connected with the pressure cylinder and the stepping motor.

3. The rapid pin pressing device according to claim 1 or 2, wherein the fine-tuning pressing block comprises a pressing head bracket, a floating pressing head and a nylon cushion; the pressure head support is a circular ring sleeve, and the top end of the pressure head support is fixedly connected with the lower end of the upper side guide plate through a screw; the floating pressure head and the connecting support are movably connected: the inner wall of the bottom of the pressure head support is provided with an inclined plane protruding inwards, the edge of the upper part of the floating pressure head protrudes outwards and is just embedded on the inclined plane protruding inwards of the pressure head support; the nylon cushion is fixedly arranged at the bottom of the floating pressure head through a screw; the top of the floating pressure head is provided with an upwards convex round head; a cushion block is fixedly arranged at the center of the bottom end of the upper guide plate; the cushion block is positioned above the fine adjustment pressing block.

4. The quick pin pressing device according to claim 1 or 2, wherein the ring sleeve is a copper sleeve; the ring sleeve penetrates through a central hole of the workbench and is fixed on the workbench through a bolt; the guide seat is fixedly connected with the floating positioning base through bolts.

5. The rapid pin pressing device according to claim 1 or 2, wherein the cross section of the heightening pin is in an inverted T shape, the upper pin of the heightening pin is inserted into the lower part of the central hole of the pin positioning block, and the bottom round head of the heightening pin is embedded in the central groove at the top of the pressing pin block.

6. The quick pin press apparatus according to claim 1 or 2, wherein the connecting member comprises a top circular truncated cone, a bottom flange ring and a middle cylindrical collar, the bottom flange ring of the connecting member is fixedly connected with the lower guide plate by a screw, and a downwardly protruding protrusion is provided at the inner side of the bottom end of the bottom flange ring of the connecting member to be fitted into the central recess of the lower guide plate.

7. The rapid pin pressing device according to claim 1 or 2, wherein the first signal transceiver is provided with three magnetic control signal switches, namely an upper limit magnetic control signal switch, a zero magnetic control signal switch and a lower limit magnetic control signal switch, which are connected with a control system in the electric cabinet; three magnetic control signal switches of the first signal transceiver are arranged on a vertical thin rod fixed beside the workbench through a signal switch mounting plate and are positioned near the lower side guide plate; the upper end and the lower end of the vertical thin rod are respectively connected and fixed with the workbench and the lower mounting plate; the upper limit magnetic control signal switch in the first signal transceiver is positioned beside the connecting piece, the zero magnetic control signal switch is positioned near the initial position of the lower side guide plate, and the lower limit magnetic control signal switch is positioned at a point below the initial position of the lower side guide plate.

8. The rapid pin pressing device according to claim 1 or 2, wherein the second signal transceiver is provided with two magnetic control signal switches, namely an upper limit magnetic control signal switch and a zero position magnetic control signal switch, which are connected with a control system in the electric cabinet; two magnetic control signal switches of the second signal transceiver are arranged on a vertical thin rod fixed beside the workbench and positioned near the upper side guide plate; the upper end and the lower end of the vertical thin rod are respectively connected and fixed with the pressure cylinder mounting plate and the workbench; the zero magnetic signal controller in the second signal transceiver is positioned near the initial position of the upper guide plate, and the upper limit magnetic control signal switch is positioned at a point above the initial position of the upper guide plate.

9. The rapid pin pressing device according to claim 1 or 2, wherein the frame is provided with a start button at two sides in front of the pin pressing component and a stop button at one side; and two grating detection devices are respectively arranged on two sides of the press pin component on the rack and are connected with the input end of a PLC (programmable logic controller) of a control system in the electric cabinet.

10. The quick pin pressing device according to claim 1 or 2, wherein the lower part of the piston rod of the pressure cylinder is screwed into the floating joint but not screwed to the bottom, and a certain gap is left between the bottom end of the piston rod of the pressure cylinder and the transition plate below the floating joint sleeve and the floating joint sleeve; a floating joint sleeve is sleeved outside the floating joint; a transition plate is arranged below the floating joint and the floating joint sleeve; two long-strip-shaped transition blocks with square sections are respectively arranged on two sides below the transition plate; the floating joint sleeve is fixedly connected with the transition plate through a screw; the transition plate and the strip-shaped transition block are fixedly connected with the upper side guide plate through screws; a certain gap is left between the floating joint and the floating joint sleeve; the bottom end of a piston rod of the pressure cylinder is connected with the upper guide plate through a transition plate and two strip-shaped transition blocks.