CN113198957A

CN113198957A - Joint blank forging forming process

Info

Publication number: CN113198957A
Application number: CN202110417865.8A
Authority: CN
Inventors: 林象; 张俊俊; 王振洲; 李瑞恭; 林朝阳
Original assignee: Shanghai Changte Forging Co ltd
Current assignee: Shanghai Changte Forging Co ltd
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2021-08-03
Anticipated expiration: 2041-04-19
Also published as: CN113198957B

Abstract

The application relates to a joint blank forging forming process, which belongs to the technical field of forging and comprises the following steps: s1, blanking; s2, heating; s3, upsetting; s4, forming a joint; s5, punching; s6, heat treatment; and S7, cleaning the shot blast. Because the forging mode is adopted to realize the molding of the joint, the internal structure of the joint is more compact, the strength of the joint is improved, the mechanical performance of the joint is improved, and the forging and the punching are carried out together, the time for molding a joint blank is saved on one hand, and the enterprise forging cost is saved on the other hand.

Description

Joint blank forging forming process

Technical Field

The application relates to the technical field of forging, in particular to a joint blank forging forming process.

Background

A forging is currently a workpiece or blank obtained by forging and deforming a metal blank. The mechanical properties of the metal blank can be changed by applying pressure to the metal blank to generate plastic deformation. The forging is divided into cold forging and warm forging and hot forging according to the temperature of the blank during processing. Cold forging is generally conducted at room temperature, and hot forging is conducted at a temperature higher than the recrystallization temperature of the metal ingot.

Referring to fig. 1, in the related art, a joint blank for an automobile is disclosed, which includes a connecting shaft 500 and a connecting sleeve 600, wherein the connecting shaft 500 is cylindrical, and the connecting shaft 500 is fixedly connected to the connecting sleeve 600. The axis of the connecting sleeve 600 is perpendicular to the axis of the connecting shaft 500. The connecting sleeve 600 is of an annular structure, the diameters of the two ends of the connecting sleeve are smaller than the diameter of the middle of the connecting sleeve, and the diameter of the middle of an inner hole of the connecting sleeve 600 is smaller than the diameters of the two ends of the inner hole. When the joint blank is processed, a casting process is generally adopted, liquid metal is directly poured into a casting cavity with a shape matched with that of the joint blank, and the joint blank can be obtained after the liquid metal is cooled and solidified.

In view of the above-mentioned drawbacks of the related art, the inventors believe that when the joint blank is directly formed by a casting process, the internal structure of the cast joint blank is loose and has low strength, resulting in poor mechanical properties.

Disclosure of Invention

In order to improve the strength of the joint blank and thus improve the mechanical properties thereof, the application provides a forging and forming process of the joint blank.

The application provides a joint blank forging forming process, adopts following technical scheme:

a forging and forming process of a joint blank comprises the following steps:

s1, blanking;

cutting a base material into a plurality of shorter raw material columns according to the size of a joint blank to be processed by adopting round steel as the base material;

s2, heating;

heating the raw material column;

s3, upsetting;

forging and pressing the raw material column to make the diameter of the raw material column thicker and the height shorter;

s4, forming a joint;

(1) arranging a lower die and an upper die;

the lower die is formed by communicating a first accommodating cavity with the same shape as the connecting shaft with a second accommodating cavity with the same shape as the half of the axis of the outer wall of the connecting sleeve, the depth of the first accommodating cavity is the length of the connecting shaft, and the depth of the second accommodating cavity is the radius length of the connecting sleeve;

the upper die comprises a first upper die and a second upper die, the first upper die is a columnar punch, the diameter of the columnar punch is the same as that of the connecting shaft, the second upper die is provided with a third accommodating cavity which is the same as the half of the axis of the outer wall of the connecting sleeve in shape, and the depth of the third accommodating cavity is the radius length of the connecting sleeve;

(2) forming a connecting shaft;

reheating the upset raw material column, then placing the reheated raw material column on a lower die, and then forging and pressing the raw material column by using a columnar punch until part of blank of the raw material column is placed in the first accommodating cavity to form a connecting shaft;

(3) forming a connecting sleeve;

then the second upper die is used for forging and pressing the raw material column, so that the rest part of the raw material column forms a connecting sleeve, and a joint entity is finally formed;

s5, punching;

(1) the lower die is arranged to rotate;

punching by adopting a punch press, wherein the punch press comprises a workbench, and the lower die rotates on the workbench;

after the joint entity is formed, the connecting shaft is vertically arranged; after the lower die rotates 90 degrees, the connecting shaft is horizontally arranged;

(2) arranging a first stamping head and a second stamping head;

the first punching head and the second punching head are both arranged in a conical shape, and both the first punching head and the second punching head vertically slide on the workbench and slide towards or away from each other;

(3) punching is carried out;

after the lower die rotates, the first punching head and the second punching head punch the connecting sleeve simultaneously, so that a communicating hole is formed in the connecting sleeve, and a connector blank is formed.

Through adopting above-mentioned technical scheme, adopt the shaping that forged mode realized the joint for it is compacter to connect the inner organization, thereby has improved the intensity that connects, and then has improved the mechanical properties that connects, and because forging and pressing and punching a hole go on together, practiced thrift on the one hand and connect the fashioned time of blank, on the other hand has practiced thrift the enterprise and has forged the cost.

Optionally, the forging process of the joint blank further includes the following steps:

s6, heat treatment;

and adjusting the formed joint blank to be processed.

By adopting the technical scheme, the strength of the joint blank after forming can be further improved, the internal stress of the joint blank can be eliminated, and the internal organization structure can be stabilized.

s7, cleaning shot blasting;

and performing shot blasting treatment on the joint blank subjected to the quenching and tempering treatment.

By adopting the technical scheme, the step can be used for smoothing the surface of the joint blank, and the surface quality of the joint blank is improved.

Optionally, the lower mould both ends all are fixed with the dwang, are provided with two backup pads on the workstation, two the dwang rotates with two backup pads respectively and is connected, one the dwang coaxial fixation has driven gear, install driving motor on the workstation, the coaxial driving gear that is fixed with of driving motor output shaft, driving gear and driven gear meshing.

Through adopting above-mentioned technical scheme, start driving motor, driving motor drives the rotation of driven gear, and driven gear drives the rotation of driving gear to the rotation of drive dwang, and then the automatic rotation of drive lower mould makes the lower mould rotate 90 degrees automatically.

Optionally, a supporting block is vertically slid on the workbench and is abutted against the lower die.

Through adopting above-mentioned technical scheme, set up the purpose that the supporting shoe slided, when the lower mould rotated, the supporting shoe gliding broke away from the lower mould, can not hinder the rotation of lower mould, when the lower mould accomplished to rotate the back, the supporting shoe was slided on the supporting shoe to with the lower mould butt, when forging, play the supporting role to the lower mould.

Optionally, a pushing hydraulic cylinder is fixed in the lower die, a piston rod of the pushing hydraulic cylinder can be arranged in the first accommodating cavity, a bearing block is fixed on one side of the workbench, a second jacket is vertically slid on the bearing block, a clamping block is fixed on the bearing block, a first jacket is vertically slid on the clamping block, the shape of the first jacket and the shape of the second jacket are the same as the shape of the connecting sleeve, the connecting sleeve can be arranged in the first jacket and the second jacket, a through hole for the first punching head to pass through is formed in the first jacket, a through hole for the second punching head to pass through is formed in the second jacket, the second punching head vertically slides in the bearing block, and the first punching head vertically slides on the clamping block.

Through adopting above-mentioned technical scheme, when punching a hole, start and promote the pneumatic cylinder, promote the removal that the pneumatic cylinder promoted the connecting axle for the adapter sleeve breaks away from and holds chamber two, then drive first clamp cover and second clamp cover and slide in opposite directions, make the adapter sleeve arrange first clamp cover and second clamp cover in, then drive first punching press head and second punching press head and slide in opposite directions, make first punching press head and second punching press head punch a hole to the adapter sleeve.

Optionally, a third stamping head is vertically slid in the first stamping head, and the diameter of the third stamping head is the same as the diameter of the middle part of the inner hole of the connecting sleeve after the joint blank is formed.

Through adopting above-mentioned technical scheme, the purpose that sets up the third punching press head is, when punching a hole to the adapter sleeve, first punching press head and second punching press head of forerunner move and carry out preliminary punching a hole to the adapter sleeve, then make first punching press head and second punching press head after reseing, the slippage of redriving third punching press head for the third punching press head carries out the secondary and punches a hole to the adapter sleeve, thereby washes off the part between two blind holes, makes the inside intercommunicating pore that forms of adapter sleeve.

Optionally, the side wall of the bearing block is provided with a downward inclined slide way communicated with the outside, a vertical sliding groove is formed in the bearing block, the second stamping head slides in the sliding groove, and the slide way is communicated with the sliding groove.

Through adopting above-mentioned technical scheme, the purpose that sets up the slide is for the burr that third impact head washed away can arrange to the external world through the slide.

Optionally, a sliding hydraulic cylinder is vertically fixed on the clamping block, a piston rod of the sliding hydraulic cylinder is connected with a third punching head in a rotating mode, a positioning tooth is fixed on the third punching head, a moving hole is formed in the first punching head, a connecting groove is formed in the inner wall of the moving hole, the positioning tooth can be arranged in the connecting groove, the third punching head slides and rotates in the moving hole, a fixed rod is rotated on a cylinder body of the sliding hydraulic cylinder, and the third punching head slides in the fixed rod.

Through adopting above-mentioned technical scheme, during the initialization, the location tooth is arranged in the intertooth space of spread groove, when the third punching press head removed, can drive the removal of first punching press head, when making the third punching press head remove alone, the rotation of drive dead lever, the dead lever drives the rotation of third punching press head to make the location tooth break away from the spread groove, thereby when making the pneumatic cylinder that slides flexible, only can drive the sliding of third punching press head.

Optionally, be fixed with drive motor on the clamp splice, the coaxial transmission master gear that is fixed with of drive motor output shaft, the dead lever coaxial fixation has the transmission to follow the gear, the transmission master gear is followed the gear engagement with the transmission, coaxial rotation has solid fixed ring on the dead lever, gu fixed ring and clamp splice fixed connection, be fixed with the guide bar on the first punching head, solid fixed ring is worn out to the guide bar.

By adopting the technical scheme, the transmission motor is started, the transmission motor electrically transmits the rotation of the main gear, the transmission main gear drives the transmission to rotate from the gear, so that the fixed rod is driven to rotate, the fixed rod drives the third punching head to rotate, and therefore the first punching head and the third punching head are automatically connected or separated.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the joint is formed in a forging mode, so that the internal structure of the joint is more compact, the strength of the joint is improved, the mechanical performance of the joint is improved, and forging and punching are carried out in one piece, so that the forming time of a joint blank is saved, and the forging cost of an enterprise is saved;

2. the third punching head is arranged for primarily punching the connecting sleeve by the first punching head and the second punching head, and secondarily punching the connecting sleeve by the third punching head, so that the part between the two blind holes is punched, and a communicating hole is quickly formed in the connecting sleeve;

3. the purpose of the slideway is to enable the burrs washed away by the third impact head to be discharged to the outside through the slideway.

Drawings

Fig. 1 is a schematic view of the structure of a joint.

Fig. 2 is a flow chart of joint blank forging.

Fig. 3 is a schematic view showing the structure of the driving mounting post on the frame of the punching machine for sliding rotation.

Fig. 4 is a schematic view showing a structure for driving the lower mold to rotate.

Fig. 5 is a sectional view showing an inner structure thereof after cutting away a portion of the table and the lower mold.

Fig. 6 is a schematic view showing a punching structure on a punching machine.

Fig. 7 is a sectional view showing a connection relationship between the first punch and the third punch.

FIG. 8 is a schematic view showing the overall structure of the positional relationship between the press and the mesh-belt type tempering furnace.

Description of reference numerals: 100. a work table; 110. a lower die; 111. a first accommodating cavity; 112. a second accommodating cavity; 113. pushing the hydraulic cylinder; 120. a support plate; 121. rotating the rod; 122. a driven gear; 130. a drive motor; 131. a driving gear; 132. a support block; 140. a first hydraulic cylinder; 150. a second punch; 160. a bearing block; 161. a sliding groove; 162. a third hydraulic cylinder; 163. a clamping block; 165. A slideway; 166. a second hydraulic cylinder; 167. cutting the board; 168. a cutting motor; 169. cutting the saw teeth; 200. a frame; 210. mounting a column; 211. a fourth punch; 220. a reciprocating screw; 230. rotating the motor; 231. a primary pulley; 232. a secondary pulley; 240. an auxiliary motor; 241. rotating the main gear; 242. rotating the slave gear; 250. a lifting groove; 251. a lifting hole; 260. an auxiliary hydraulic cylinder; 261. an electromagnet; 262. a locking lever; 270. a columnar punch; 280. a second upper die; 281. a third accommodating cavity; 290. a first punch; 291. moving the hole; 292. connecting grooves; 300. a sliding hydraulic cylinder; 310. fixing the rod; 311. an auxiliary groove; 312. a driven gear; 313. a drive motor; 314. a transmission main gear; 315. a return spring; 316. a fixing ring; 317. a ring groove; 318. a guide bar; 320. a third punch; 321. positioning teeth; 322. an auxiliary block; 400. a mesh belt type hardening and tempering furnace; 500. a connecting shaft; 600. connecting sleeves; 700. a fixed block; 800. a fifth hydraulic cylinder; 810. a first jacket; 820. a sixth hydraulic cylinder; 821. a second jacket.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

The embodiment of the application discloses a forging and forming process of a joint blank.

Referring to fig. 2, the forging and forming process of the joint blank comprises the following steps: s1, blanking; s2, heating; s3, upsetting; s4, forming a joint; s5, punching; s6, heat treatment; and S7, cleaning the shot blast.

At S1, the base material is cut into a plurality of shorter columns of feedstock using a sawing machine, using round steel as the base material, depending on the size of the joint blank to be machined.

In S2, the raw material column is heated by an intermediate frequency heating furnace.

In S3, the raw material column is forged by a punch press to make the raw material column thicker in diameter and shorter in height, thereby forming a raw material billet.

Referring to fig. 3, the press includes a table 100 and a frame 200, the frame 200 is vertically fixed to a sidewall of the table 100, a mounting post 210 is rotatably and vertically slidably moved on the frame 200, and a fourth press ram 211 having a cylindrical shape is fixed to the mounting post 210. The feedstock column is placed on the table 100 and forged by the fourth ram 211.

In order to drive the mounting column 210 to slide and rotate, two vertical reciprocating lead screws 220 are rotated on the frame 200, and two ends of the mounting column 210 are respectively in threaded connection with the two reciprocating lead screws 220. The rack 200 is provided with a rotating motor 230 through a bolt, an output shaft of the rotating motor 230 is coaxially fixed with a main belt pulley 231, the main belt pulley 231 is coaxially and fixedly connected with the upper end of one reciprocating screw rod 220, the upper end of the other reciprocating screw rod 220 is coaxially fixed with a slave belt pulley 232, and the main belt pulley 231 is synchronously connected with the slave belt pulley 231 through a belt in a transmission way. A rotary driven gear 242 is coaxially fixed at one end of the mounting column 210, a horizontal auxiliary motor 240 is mounted on the frame 200 through a bolt, a rotary main gear 241 is coaxially mounted on an output shaft of the auxiliary motor 240, and the rotary driven gear 242 can be meshed with the rotary main gear 241.

In order to lock the mounting post 210 in rotation, two vertical lifting slots 250 are formed in the frame 200, and two ends of the mounting post 210 slide in the two lifting slots 250 respectively. Two auxiliary hydraulic cylinders 260 are fixed on the frame 200, electromagnets 261 are fixed on piston rods of the two auxiliary hydraulic cylinders 260, iron locking rods 262 can be attached to the electromagnets 261, lifting holes 251 are formed in the bottom walls of the lifting grooves 250, the locking rods 262 penetrate through the lifting holes 251 and are inserted into the rotating slave gears 242, and the locking rods 262 can slide in the lifting holes 251. When the mounting post 210 rotates, the electromagnet 261 abuts against the locking rod 262, the electromagnet 261 is electrified, so that the locking rod 262 is adsorbed, then the auxiliary hydraulic cylinder 260 is started, the auxiliary hydraulic cylinder 260 is stretched, so that the electromagnet 261 is driven to slide, and the locking rod 262 is separated from the gear 242 from rotation; after the mounting post 210 is rotated, the auxiliary hydraulic cylinder 260 is retracted, so that the electromagnet 261 drives the locking rod 262 to be inserted into the rotating slave gear 242, and then the electromagnet 261 is powered off, so that the mounting post 210 can normally slide.

S4 includes the steps of:

referring to fig. 3 and 4, (1) a lower die 110 is arranged on the workbench 100, the lower die 110 is provided with a first accommodating cavity 111 and a second accommodating cavity 112, and the first accommodating cavity 111 is communicated with the second accommodating cavity 112. The shape of the first accommodating cavity 111 is the same as that of the connecting shaft 500, the shape of the second accommodating cavity 112 is the same as that of the half of the axis of the outer wall of the connecting sleeve 600, the depth of the first accommodating cavity 111 is the length of the connecting shaft 500 (see fig. 1), and the depth of the second accommodating cavity 112 is the length of the radius of the connecting sleeve 600.

The upper die includes a first upper die and a second upper die 280, the first upper die is a cylindrical columnar punch 270, and the diameter of the columnar punch 270 is the same as that of the connecting shaft 500. A third accommodating cavity 281 with the same shape as a half of the axis of the outer wall of the connecting sleeve 600 is formed in the second upper die 280, and the depth of the third accommodating cavity 281 is the radius length of the connecting sleeve.

(2) The raw material blank is heated in the intermediate frequency heating furnace and then placed in the lower die 110, and then the columnar punch 270 firstly forges the raw material blank until part of the raw material blank is placed in the first accommodating cavity 111 to form the connecting shaft 500.

(3) Then, after the mounting post 210 is rotated, the second upper die 280 is placed above the lower die 110, and then the second upper die 280 is driven to forge the raw material blank, so that the rest of the raw material blank forms the connecting sleeve 600, and finally the joint entity is formed.

The step of S5 is as follows:

(1) the lower die 110 is arranged to be rotatable; rotating rods 121 are fixed at both ends of the lower die 110, two vertical support plates 120 are mounted on the workbench 100 through bolts, the two rotating rods 121 are respectively rotatably connected with the two support plates 120, and a driven gear 122 is coaxially fixed on one rotating rod 121. A driving motor 130 is mounted on the side wall of the table 100 by bolts, a driving gear 131 is coaxially fixed to an output shaft of the driving motor 130, and the driving gear 131 is engaged with the driven gear 122. After the joint entity is formed, the connecting shaft 500 is vertically arranged; after the lower die 110 rotates 90 degrees, the connecting shaft 500 is horizontally arranged.

In order not to hinder the rotation of the lower die 110, a support block 132 is vertically slid on the table 100, and the support block 132 abuts against the lower die 110. In order to drive the sliding movement of the supporting block 132, a first hydraulic cylinder 140 is vertically fixed in the working table 100, and a piston rod of the first hydraulic cylinder 140 is fixedly connected with the supporting block 132.

Referring to fig. 6, (2) a first punch head 290 and a second punch head 150 are provided; the first punch head 290 and the second punch head 150 are both tapered, and the first punch head 290 and the second punch head 150 vertically slide on the table 100 and slide toward or away from each other.

In order to drive the first punching head 290 to slide, a receiving block 160 is fixed on the side wall of one end of the workbench 100, a clamping block 163 is fixed on one end of the receiving block 160 far away from the workbench 100, a sliding hydraulic cylinder 300 is vertically fixed on the clamping block 163 through a bracket, and a piston rod of the sliding hydraulic cylinder 300 is connected with the first punching head 290.

In order to drive the second punching head 150 to slide, a vertical sliding groove 161 is formed in the bearing block 160, a third hydraulic cylinder 162 is fixed in the sliding groove 161, a piston rod of the third hydraulic cylinder 162 is fixedly connected with the second punching head 150, and the second punching head 150 slides in the sliding groove 161.

(3) Punching is carried out;

a pushing hydraulic cylinder 113 which is parallel to the axis of the first accommodating cavity 111 is fixed in the lower die 110, and a piston rod of the pushing hydraulic cylinder 113 can be placed in the first accommodating cavity 111 and is initially flush with the bottom wall of the first accommodating cavity 111. A fifth hydraulic cylinder 800 is vertically fixed to the clamp block 163 through a bracket, and a first collet 810 is fixed to a piston rod of the fifth hydraulic cylinder 800. A sixth hydraulic cylinder 820 is vertically fixed in the receiving block 160, a second collet 821 is fixed on a piston rod of the sixth hydraulic cylinder 820, the first collet 810 and the second collet 821 can be abutted, and the connecting sleeve 600 can be placed in the first collet 810 and the second collet 820. The upper surface of the first clamping sleeve 810 is provided with a through hole for the first punch 290 to pass through, and the lower surface of the second clamping sleeve 821 is provided with a through hole for the second punch 150 to pass through. During punching, the lower die 110 is rotated, after the lower die 110 is rotated by 90 degrees, the pushing hydraulic cylinder 113 is started, the pushing hydraulic cylinder 113 is extended, so that the connecting sleeve 600 is pushed out of the lower die 110, then the fifth hydraulic cylinder 800 and the sixth hydraulic cylinder 820 are simultaneously started, and the fifth hydraulic cylinder 800 and the sixth hydraulic cylinder 820 are extended, so that the first jacket 810 and the second jacket 821 are respectively driven to move, so that after the first jacket 810 abuts against the second jacket 821, the connecting sleeve 600 is placed in the first jacket 810 and the second jacket 821.

Then, the sliding hydraulic cylinder 300 and the third hydraulic cylinder 162 are started, and the sliding hydraulic cylinder 300 and the third hydraulic cylinder 162 are extended, so that the first punching head 290 and the second punching head 150 are driven to slide, and the first punching head 290 and the second punching head 150 simultaneously open blind holes at two ends of the connecting sleeve 600.

The connecting groove is characterized in that burrs are generated when the connecting sleeve 600 is punched by the first punching head 290 and the second punching head 150, therefore, in order to cut off the burrs, the horizontal second hydraulic cylinders 166 are mounted at the upper end and the lower end of the clamping block 163 through bolts, the piston rods of the second hydraulic cylinders 166 penetrate through the clamping block 163, the cutting plate 167 is fixed on the clamping block, the vertical cutting motor 168 is mounted on the cutting plate 167 through bolts, the circular cutting saw teeth 169 are coaxially fixed on the output shaft of the cutting motor 168, and the cutting saw teeth 169 can be abutted against one end of the axis of the connecting sleeve 600.

In order to discharge the burrs in the connecting sleeve 600 to the outside, the side wall of the receiving block 160 is provided with a downward inclined slide channel 165 communicated with the outside, and the slide channel 165 is communicated with the sliding groove 161. The second punch head 150 is initially positioned adjacent the slide 165.

Referring to fig. 7, in order to connect the two blind holes, a moving hole 291 is formed in the first punch 290, and tooth-shaped connecting grooves 292 are formed along the axis of the moving hole 291 on both sides of the inner wall of the moving hole 291. A third punch 320 having a cylindrical shape is slidably and rotatably provided in the moving hole 291, and a positioning tooth 321 is fixed to the third punch 320, and the positioning tooth 321 is disposed in the connecting groove 292. Initially, the third punch 320 is flush with the lower surface of the first punch 290 and the locating teeth 321 are disposed within the attachment slots 292.

A fixed rod 310 is rotatably arranged on the cylinder body of the sliding hydraulic cylinder 300 through an end face bearing, an auxiliary groove 311 is formed in the inner wall of the fixed rod 310 along the axis of the fixed rod, an auxiliary block 322 is fixedly arranged on a third stamping head 320, and the auxiliary block 322 can slide in the auxiliary groove 311. A return spring 315 is disposed in the auxiliary slot 311, two ends of the return spring 315 are respectively fixedly connected with the inner wall of the auxiliary slot 311, and the other end is fixedly connected with the auxiliary block 322. The third ram 3320 abuts against a piston rod inserted into the fixing rod 310 by the slide cylinder 300.

In order to drive the fixing rod 310 to rotate, a driven gear 312 is coaxially fixed on the fixing rod 310, a vertical driving motor 313 is mounted on the bracket of the clamping block 163 through a bolt, a driving main gear 314 is coaxially fixed on an output shaft of the driving motor 313, and the driving main gear 314 is meshed with the driven gear 312. A ring groove 317 is formed at the lower end of the fixing rod 310 along the circumferential direction thereof, a fixing ring 316 is coaxially sleeved on the fixing rod 310, and the fixing ring 316 slides in the ring groove 317 and is fixedly connected with the bracket. A guide rod 318 is welded to the upper end surface of the first punch 290, and the guide rod 318 penetrates through the fixing ring 316 to prevent the first punch 290 from rotating along with the fixing rod 310 when rotating.

Referring to fig. 8, in step S6, the molded joint blank is conditioned by the mesh belt type conditioning furnace 400, and the holder of the mesh belt type conditioning furnace 400 is brought into contact with the table 100. After punching is completed, the driving motor 130 is started, the driving motor 130 drives the driving gear 131 to rotate, so that the driven gear 122 is driven to rotate, the lower die 110 is driven to rotate, after the lower die 110 rotates 180 degrees, the driving motor 130 stops, the pushing hydraulic cylinder 113 is started, the pushing hydraulic cylinder 113 stretches, so that the joint blank is pushed to a mesh belt of the mesh belt type tempering furnace 400, then the mesh belt type tempering furnace 400 is started, and the joint blank is conveyed to the furnace for tempering.

In the step S7, performing shot blasting treatment on the tempered joint blank by using a crawler-type shot blasting machine to smooth the surface of the joint blank, so that the surface quality of the joint blank is improved.

First, second, third, fifth, sixth, pushing, sliding, and auxiliary

hydraulic cylinders

140, 166, 162, 800, 820, 113, 300, and 260 herein are each powered by a plurality of hydraulic pumps.

The implementation principle of the forging and forming process of the joint blank in the embodiment of the application is as follows:

firstly, cutting a long steel material into a plurality of raw material columns, then placing the raw material columns on the supporting blocks 132, then starting the rotating motor 230, and driving the reciprocating screw 220 to rotate by the rotating motor 230, so that the fourth punching head 211 performs upsetting on the raw material columns to form a preliminary raw material blank;

then, the support plate 120 is mounted on the table 100 by bolts so that the lower die 110 abuts against the support blocks 132, and then the raw material blank is placed on the lower die 110;

then, the electromagnet 261 is electrified, so that the electromagnet 261 adsorbs the locking rod 262, then the auxiliary hydraulic cylinder 260 is started, the auxiliary hydraulic cylinder 260 is contracted, the locking rod 262 is driven to be separated from the rotary driven gear 242, then the auxiliary motor 240 is started, the auxiliary motor 240 drives the rotary main gear 241 to rotate, the rotary main gear 241 drives the rotary driven gear 242 to rotate, the mounting column 210 is driven to rotate, the columnar punch 270 is placed above the lower die 110, then the auxiliary hydraulic cylinder 260 is driven to stretch, so that the locking rod 262 is inserted into the rotary driven gear 242, and then the electromagnet 261 is powered off;

then, the rotating motor 230 is started, the rotating motor 230 drives the reciprocating lead screw 220 to rotate, so that the columnar punch 270 forges the raw material blank, and part of the raw material blank is connected with the shaft 500 for forming;

then, the electromagnet 261 is electrified, so that the electromagnet 261 adsorbs the locking rod 262, then the auxiliary hydraulic cylinder 260 is started, the auxiliary hydraulic cylinder 260 is contracted, the locking rod 262 is driven to be separated from the rotary driven gear 242, then the auxiliary motor 240 is started, the auxiliary motor 240 drives the rotary main gear 241 to rotate, the rotary main gear 241 drives the rotary driven gear 242 to rotate, the mounting column 210 is driven to rotate, the second upper die 280 is placed above the lower die 110, then the auxiliary hydraulic cylinder 260 is driven to stretch, so that the locking rod 262 is inserted into the rotary driven gear 242, and then the electromagnet 261 is powered off;

then, the rotating motor 230 is started, the rotating motor 230 drives the reciprocating lead screw 220 to rotate, so that the second upper die 280 forges the raw material blank, and the connecting sleeve 600 is formed to form a joint entity;

then, the driving motor 130 is started, the driving motor 130 drives the driving gear 131 to rotate, and the driving gear 131 drives the driven gear 122 to rotate, so as to drive the lower die 110 to rotate 90 degrees counterclockwise;

then starting the pushing hydraulic cylinder 113, extending the pushing hydraulic cylinder 113 to enable the connecting sleeve 600 to be separated from the second accommodating cavity 112, then simultaneously starting the fifth hydraulic cylinder 800 and the sixth hydraulic cylinder 820, extending the fifth hydraulic cylinder 800 and the sixth hydraulic cylinder 820 simultaneously, respectively driving the first clamping sleeve 810 and the second clamping sleeve 821 to clamp the connecting sleeve 600, then starting the sliding hydraulic cylinder 300 and the third hydraulic cylinder 162, extending the sliding hydraulic cylinder 300 and the third hydraulic cylinder 162 simultaneously, and enabling the first punching head 290 and the second punching head 150 to punch holes in the connecting sleeve 600, so that blind holes are formed in both ends of the connecting sleeve 600;

then, the sliding hydraulic cylinder 300 and the third hydraulic cylinder 162 are driven to reset, then the transmission motor 313 is started, the transmission motor 313 drives the transmission main gear 314 to rotate, the transmission main gear 314 drives the transmission driven gear 312 to rotate, so as to drive the fixed rod 310 to rotate, so as to drive the third punching head 320 to rotate, so that the positioning teeth 321 are separated from the connecting groove 292;

then, the sliding hydraulic cylinder 300 is started, the sliding hydraulic cylinder 300 stretches, so that the third punching head 320 is driven to move, burrs in the middle of the two blind holes are punched by the third punching head 320, communicating holes are formed in the connecting sleeve 600, and the burrs are discharged to the outside from the slide way 165;

then, the cutting motor 168 is started, the cutting motor 168 drives the cutting saw teeth 169 to rotate, then the second hydraulic cylinder 166 is started, and the second hydraulic cylinder 166 is stretched, so that burrs outside the connecting sleeve 600 are removed;

then, starting a driving motor 130, wherein the driving motor 130 drives the lower die 110 to rotate clockwise by 180 degrees, and then starting a pushing hydraulic cylinder 113, and the pushing hydraulic cylinder 113 is extended, so that the joint blank is pushed to a mesh belt;

then, starting the mesh belt type tempering furnace 400, so that the joint blank is conveyed into the furnace for tempering;

and then placing the tempered joint blank into a crawler type shot blasting machine, and carrying out smooth treatment on the surface of the joint blank.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A joint blank forging forming process is characterized in that: the method comprises the following steps:

s1, blanking;

s2, heating;

heating the raw material column;

s3, upsetting;

s4, forming a joint;

(1) arranging a lower die (110) and an upper die;

the lower die (110) is formed by communicating a first accommodating cavity (111) with the same shape as the connecting shaft (500) with a second accommodating cavity (112) with the same shape as the half of the axis of the outer wall of the connecting sleeve (600), the depth of the first accommodating cavity (111) is the length of the connecting shaft (500), and the depth of the second accommodating cavity (112) is the radius length of the connecting sleeve (600);

the upper die comprises a first upper die and a second upper die (280), the first upper die is a columnar punch (270), the diameter of the columnar punch (270) is the same as that of the connecting shaft (500), the second upper die (280) is provided with a third accommodating cavity (281) which is the same as the half wall of the axis of the outer wall of the connecting sleeve (600) in shape, and the depth of the third accommodating cavity (281) is the radius length of the connecting sleeve (600);

(2) forming a connecting shaft (500);

reheating the upset raw material column, then placing the reheated raw material column on a lower die (110), and then forging and pressing the raw material column by using a columnar punch (270) until part of blank of the raw material column is placed in a first accommodating cavity (111) to form a connecting shaft (500);

(3) forming the connecting sleeve (600);

then, the second upper die (280) is used for forging and pressing the raw material column, so that the rest part of the raw material column forms a connecting sleeve (600), and a joint entity is finally formed;

s5, punching;

(1) the lower die (110) is arranged to rotate;

punching is carried out by adopting a punch press, the punch press comprises a workbench (100), and the lower die (110) rotates on the workbench (100);

after the joint entity is formed, the connecting shaft (500) is vertically arranged; after the lower die (110) rotates by 90 degrees, the connecting shaft (500) is horizontally arranged;

(2) providing a first punch (290) and a second punch (150);

the first punching head (290) and the second punching head (150) are both arranged in a conical shape, the first punching head (290) and the second punching head (150) are both vertically slid on the workbench (100), and the first punching head and the second punching head are slid towards or away from each other;

(3) punching is carried out;

after the lower die (110) rotates, the first punching head (290) and the second punching head (150) punch the connecting sleeve (600) simultaneously, so that communication holes are formed at two ends of the connecting sleeve (600), and the joint blank is formed.

2. The joint blank forging forming process according to claim 1, wherein: further comprising the steps of:

s7, heat treatment;

and adjusting the formed joint blank to be processed.

3. The joint blank forging forming process according to claim 2, wherein: further comprising the steps of:

s8, cleaning shot blasting;

4. A joint blank forging forming process according to any one of claims 1 to 3, wherein: lower mould (110) both ends all are fixed with dwang (121), are provided with two backup pad (120) on workstation (100), two dwang (121) rotate with two backup pad (120) respectively and are connected, one dwang (121) coaxial fixation has driven gear (122), installs driving motor (130) on workstation (100), driving motor (130) output shaft coaxial fixation has driving gear (131), driving gear (131) and driven gear (122) meshing.

5. The joint blank forging forming process according to claim 4, wherein: a supporting block (132) is vertically slid on the workbench (100), and the supporting block (132) is abutted to the lower die (110).

6. The joint blank forging forming process according to claim 5, wherein: a pushing hydraulic cylinder (113) is fixed in the lower die (110), a piston rod of the pushing hydraulic cylinder (113) can be arranged in a first accommodating cavity (111), a receiving block (160) is fixed on one side of the workbench (100), a second jacket (821) is vertically slid on the receiving block (160), a clamping block (163) is fixed on the receiving block (160), a first jacket (810) is vertically slid on the clamping block (163), the shapes of the first jacket (810) and the second jacket (821) are the same as that of the connecting sleeve (600), the connecting sleeve (600) can be arranged in the first jacket (810) and the second jacket (821), a through hole for the first punching head (290) to pass through is formed in the first jacket (810), a through hole for the second punching head (150) to pass through is formed in the second jacket (821), and the second punching head (150) is vertically slid in the receiving block (160), the first punching head (290) vertically slides on the clamping block (163).

7. The joint blank forging forming process according to claim 6, wherein: and a third punching head (320) is vertically slid in the first punching head (290), and the diameter of the third punching head (320) is the same as that of the middle part of the inner hole of the connecting sleeve (600) formed by the joint blank.

8. The joint blank forging forming process according to claim 7, wherein: the downward slide (165) of slope with external intercommunication is seted up to the piece that connects (160) lateral wall, vertical groove (161) that slides have been seted up in the piece that connects (160), second punching press head (150) slide in groove (161) that slides, slide (165) and groove (161) intercommunication that slides.

9. The joint blank forging forming process according to claim 8, wherein: the vertical pneumatic cylinder (300) that slides that is fixed with on clamp splice (163), the piston rod and the third punching press head (320) of pneumatic cylinder (300) that slides rotate to be connected, be fixed with location tooth (321) on third punching press head (320), seted up removal hole (291) in first punching press head (290), connection groove (292) have been seted up to removal hole (291) inner wall, connection groove (292) can be arranged in to location tooth (321), third punching press head (320) slide and rotate in removal hole (291), it has dead lever (310) to rotate on pneumatic cylinder (300) cylinder body that slides, third punching press head (320) slide in dead lever (310).

10. The joint blank forging forming process according to claim 9, wherein: be fixed with drive motor (313) on clamp splice (163), drive motor (313) output shaft coaxial fixation has transmission master gear (314), dead lever (310) coaxial fixation has transmission from gear (312), transmission master gear (314) and transmission from gear (312) meshing, coaxial rotation has solid fixed ring (316) on dead lever (310), gu fixed ring (316) and clamp splice (163) fixed connection, be fixed with guide bar (318) on first punching press head (290), gu fixed ring (316) is worn out in guide bar (318).