A device for heat treating a ball cage blank

Abstract

The application relates to the technical field of heat treatment devices, in particular to a ball cage blank heat treatment device, which comprises an annealing box and a feeding table. A feeding assembly is arranged below the feeding table and comprises a feeding mechanism and a bracket mechanism. The feeding mechanism comprises a bidirectional hydraulic cylinder arranged on the feeding table and a driving block fixedly connected with the bidirectional hydraulic cylinder. A top rod is movably arranged on the driving block. The other end of the top rod is movably arranged with a feeding disc. The bracket mechanism comprises a first bracket arranged on the feeding table. The bracket mechanism can be changed from a moving state to a processing state through a second mode assembly. At this time, the spacing between the first bracket, the second bracket, the third bracket and the fourth bracket is expanded, the heat conduction effect is improved, the heating is more sufficient, on the other hand, compared with the processing state, the bracket spacing is smaller and the height is lower in the moving state, the gravity center of the bracket mechanism is reduced, and the stability during feeding and moving is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat treatment devices, in particular to a ball cage blank heat treatment device. BACKGROUND

[0002] Ball cage (constant velocity joint) is the core component of automobile transmission system, used for transmitting torque and adapting to the angle change of driving shaft. In the manufacturing of ball cage, the blank needs to be annealed, that is, the blank is heated to critical temperature and then slowly cooled, for eliminating internal stress and improving cutting performance.

[0003] In the prior art, in the heat treatment step, the blank is first placed on the bracket by using the feeding mechanism, the blank is carried and stacked by the bracket, the bracket is sent into the annealing box, then heating treatment is carried out, and after cooling, the annealed blank is discharged by using the discharging mechanism and sent to the next processing link. However, in the above steps, the blank is placed on the bracket, which causes the blank and the detached part to partially overlap. When heating, the overlapping part will cause the surface of the blank to be heated due to the blocking of heat transfer by the bracket, and secondly, if the distance between the brackets is low, the heat transfer will be affected, which will affect the heat treatment effect. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a ball cage blank heat treatment device to solve the problems raised in the background art.

[0005] To achieve the above purpose, the present application is realized by the following technical scheme: a ball cage blank heat treatment device, comprising an annealing box and a feeding table, the lower part of the feeding table is provided with a feeding assembly, which comprises a feeding mechanism and a bracket mechanism, the feeding mechanism comprises a double-way hydraulic cylinder arranged on the feeding table, and a driving block fixedly connected with the double-way hydraulic cylinder, a top rod is movably installed on the driving block, and the other end of the top rod is movably installed with a feeding disc.

[0006] The bracket mechanism comprises a first bracket arranged on the feeding table, first lead screws and limiting columns are arranged on the two sides of the first bracket respectively, a second bracket, a third bracket and a fourth bracket are movably arranged on the outer surface of the limiting column from bottom to top, the first lead screw is screw-connected with the second bracket, and is movably contacted with the third bracket and the fourth bracket.

[0007] The left and right sides of the inner cavities of the first bracket, the second bracket, the third bracket and the fourth bracket are fixedly installed with shafts, the two sides of the outer surface of the shafts are movably installed with supporting pieces, the supporting pieces are provided with trays, and the middle part of the tray is fixedly installed with a top plate.

[0008] Preferably, the shape of the supporting piece is semicircular, and a positioning rod is arranged above one side of the supporting piece and in movable contact with the upper surface of the supporting piece.

[0009] Preferably, two servo motors are fixedly installed on the two sides of the feeding table, a second lead screw is fixedly installed on the output shaft of the servo motor, a screw sleeve is spirally connected to the outer surface of the second lead screw, a pushing rod is fixedly installed on the screw sleeve, a bidirectional electric push rod is fixedly installed at the other end of the pushing rod, and the pushing rod and the butt joint hole are arranged on the first bracket.

[0010] Preferably, the second mode assembly comprises a hydraulic rod fixedly installed on the annealing box, a rack fixedly installed on the output shaft of the hydraulic rod, and a gear fixedly installed on the top of the first lead screw.

[0011] The first guide and the second guide are fixedly installed on the two sides of the first bracket, the first connecting rod is movably installed on one side of the second bracket, the other end of the first connecting rod is movably connected with the third bracket, the second connecting rod is movably installed on the side of the third bracket away from the first connecting rod, and the other end of the second connecting rod is movably connected with the fourth bracket.

[0012] Preferably, the first guide and the second guide are both curved, the curved part of the first guide is located between the second bracket and the third bracket, and the curved part of the second guide is located between the third bracket and the fourth bracket.

[0013] Preferably, the first connecting rod and the second connecting rod are both two sections, and a roller is movably installed at the hinge of the two sections, and the two rollers are respectively located at the curved parts of the first guide and the second guide.

[0014] Preferably, the turning assembly comprises a mounting plate fixedly installed on the first bracket, the second bracket, the third bracket and the fourth bracket, a plurality of sprockets movably installed on the mounting plate, a rotating roller fixedly installed at the middle part of the sprocket, a chain transmissionally connected to the outer surface of the sprocket, a clockwork box fixedly installed on the first bracket, the second bracket, the third bracket and the fourth bracket, a reed shaft fixedly connected with one sprocket at the center of the clockwork box, and a rocker fixedly installed at the other end of the reed shaft.

[0015] Preferably, the tray is provided with blank parts, the rotating rollers are located between the two blank parts, the rotating rollers on the two sides of the top plate are mirror image arranged, and the tray is provided with a clearance slot matched with the rotating roller.

[0016] Preferably, the first bracket, the second bracket, the third bracket and the fourth bracket are fixedly installed with support columns, the outer circumferential side of the support column is sleeved with a reset spring, and a limiting piece is movably installed, the other end of the limiting piece is provided with a clamping groove matched with the rocker, the surface of the limiting piece is fixedly installed with a first linkage column, and the inner cavity of the annealing box is provided with a second linkage column.

[0017] Preferably, the annealing device further comprises a blanking assembly, which comprises a blanking box arranged above the fourth bracket, the blanking box is provided with a clearance groove, the fourth bracket and the blanking box are fixedly installed with stud bolts, the outer side of the stud bolt is sleeved with a tight plate, and the outer surface of the stud bolt is threadedly connected with a nut.

[0018] In the above technical solution, the beneficial effects of the present application are that the bracket mechanism can be changed from a moving state to a processing state through the second mode assembly, at this time, the spacing between the first bracket, the second bracket, the third bracket and the fourth bracket is expanded, the heat conduction effect is improved, the heating is more sufficient, on the other hand, compared with the processing state, the bracket spacing is smaller and the height is lower in the moving state, the gravity center of the bracket mechanism can be reduced, and the stability during feeding and moving is improved.

[0019] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory, rather than limiting the present disclosure.

[0020] The present application file provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Structure diagram of the present application Figure 1 ;

[0022] Figure 2 Structure diagram of the present application Figure 2 ;

[0023] Figure 3 Structure diagram of the present application Figure 3 ;

[0024] Figure 4 Position relationship structure diagram of the tray and the bracket mechanism of the present application Figure 1 ;

[0025] Figure 5 Position relationship structure diagram of the tray and the bracket mechanism of the present application Figure 2 ;

[0026] Figure 6 Position relationship structure diagram of the tray and the bracket mechanism of the present application Figure 3 ;

[0027] Figure 7 Schematic diagram of position relationship structure of turnover assembly and bracket mechanism of the application Figure 4 ;

[0028] Figure 8 Schematic diagram of three-dimensional explosion structure of tray and bracket mechanism of the application

[0029] Figure 9 Schematic diagram of partial enlarged structure at A in the application Figure 3 ;

[0030] Figure 10 Schematic diagram of partial enlarged structure at B in the application Figure 5 ;

[0031] Figure 11 Schematic diagram of state structure of feeding and discharging of the application Figure 1 ;

[0032] Figure 12 Schematic diagram of state structure of feeding and discharging of the application Figure 2 .

[0033] In the figure: 1, annealing box; 11, lifting frame; 12, box door; 13, feeding table; 2, bidirectional hydraulic cylinder; 21, driving block; 22, guide column; 23, top rod; 24, feeding disc; 25, feeding port; 26, first bracket; 27, first lead screw; 28, limiting column; 29, second bracket; 210, third bracket; 211, fourth bracket; 212, rotating shaft; 213, supporting piece; 214, positioning rod; 215, tray; 216, top plate; 217, servo motor; 218, second lead screw; 219, screw sleeve; 220, pushing rod; 221, bidirectional electric pushing rod; 222, embedded groove; 223, butt joint hole; 3, hydraulic rod; 31, rack; 32, gear; 33, first guide piece; 34, second guide piece; 35, first connecting rod; 36, second connecting rod; 37, roller; 4, mounting plate; 41, chain wheel; 42, rotating roller; 43, chain; 44, clockwork box; 45, rocker; 46, blank; 47, accommodation groove; 5, supporting column; 51, return spring; 52, limiting piece; 53, clamping groove; 54, first linkage column; 55, second linkage column; 6, discharging box; 61, accommodation groove; 62, stud; 63, tight plate; 64, nut. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application.

[0035] Embodiment 1: Please refer to Figures 1 to 3 ,Figure 9 、 Figure 11 and Figure 12 The application provides a technical scheme: a ball cage blank heat treatment device, which comprises an annealing box 1 and a feeding table 13, and a feeding assembly is arranged below the feeding table 13, the feeding assembly comprises a feeding mechanism and a bracket mechanism, the feeding mechanism comprises a bidirectional hydraulic cylinder 2 arranged on the feeding table 13 and a driving block 21 fixedly connected with the bidirectional hydraulic cylinder 2, a top rod 23 is movably arranged on the driving block 21, and a feeding disc 24 is movably arranged at the other end of the top rod 23;

[0036] The bracket mechanism comprises a first bracket 26 arranged on the feeding table 13, first lead screws 27 and limiting columns 28 are arranged on the two sides of the first bracket 26 respectively, a second bracket 29, a third bracket 210 and a fourth bracket 211 are movably arranged on the outer surface of the limiting column 28 from bottom to top, the first lead screw 27 is screw-connected with the second bracket 29 and movably contacts with the third bracket 210 and the fourth bracket 211.

[0037] The first bracket 26, the second bracket 29, the third bracket 210 and the fourth bracket 211 are all fixedly provided with rotating shafts 212 on the left and right sides of the inner cavities, the rotating shafts 212 are movably provided with supporting pieces 213 on the two sides of the outer surfaces, the supporting pieces 213 are provided with trays 215, and the trays 215 are fixedly provided with top plates 216 in the middle parts.

[0038] The supporting pieces 213 are semicircular in shape, the supporting pieces 213 are provided with positioning rods 214 above one side, and the positioning rods 214 movably contact with the upper surfaces of the supporting pieces 213.

[0039] The device further comprises a discharging assembly, the discharging assembly comprises a discharging box 6 arranged above the fourth bracket 211, the discharging box 6 is provided with a gap 61, screw posts 62 are fixedly arranged on the fourth bracket 211 and the discharging box 6, the screw posts 62 are provided with tight plates 63 on the outer sides, and the screw posts 62 are screw-connected with nuts 64 on the outer surfaces.

[0040] Specifically, one side of the annealing box 1 is fixedly installed with a lifting frame 11, the lifting frame 11 is fixedly installed with a box door 12, a through slot is formed in the middle of a feeding table 13, when feeding, the first bracket 26 is placed on the through slot, the first bracket 26 can be fixed by using an angle iron and a bolt, the bidirectional hydraulic cylinder 2 is below the annealing box 1, a feeding opening 25 is formed on the surface of the feeding table 13, which can be used for butt joint with a conveying device to send the tray 215 loaded with the blank 46 to the feeding disc 24, the driving block 21 can be driven to move by starting the feeding disc 24, the middle part of the driving block 21 is movably installed with a guide column 22, the guide column 22 is fixedly installed on the feeding table 13 and is used for guiding and supporting the driving block 21, when the driving block 21 moves, the top rod 23 is driven, so that the top rod 23 drives the feeding disc 24 to be lifted upward, in the process that the feeding disc 24 drives the tray 215 to move upward, the tray 215 will contact the supporting piece 213, at this time, the supporting piece 213 will rotate under the interference of the tray 215, so that the tray 215 continues to rise beyond the supporting piece 213, when manufacturing, a counterweight block can be embedded in the supporting piece 213, so that the weight of the side of the supporting piece 213 away from the positioning rod 214 is greater, when the tray 215 completely passes the supporting piece 213, the supporting piece 213 will reset under the action of the weight, at this time, the feeding disc 24 is lowered again, the width of the feeding disc 24 is less than the spacing between the supporting pieces 213, so that the supporting pieces 213 can be reset smoothly, and the tray 215 is carried by the reset supporting pieces 213, so that the first feeding is completed;

[0041] After the first feeding is completed, the next tray 215 carrying the blank 46 will continue to be sent into the feeding disc 24 by the conveying device through the feeding opening 25, at this time, the bidirectional hydraulic cylinder 2 is started again to drive the tray 215 to rise, which is different from the first feeding, the first bracket 26 already has a tray 215, at this time, the new tray 215 will contact the previous tray 215 in the rising process, and the tray 215 in the first bracket 26 is lifted in the process that the feeding disc 24 continues to rise, when the new tray 215 contacts the supporting piece 213 in the first bracket 26, the tray 215 originally in the first bracket 26 will contact the supporting piece 213 in the second bracket 29, when the new tray 215 is carried by the supporting piece 213 in the first bracket 26 according to the first feeding step, the original tray 215 is carried by the supporting piece 213 in the second bracket 29, so that the feeding can be completed by repeating the steps;

[0042] Further, in the blanking process, only the blanking box 6 internally provided with the rotating shaft 212, the supporting piece 213 and the positioning rod 214 is connected with the fourth bracket 211, and the close plate 63 is sleeved on the stud 62, and then the nut 64 is tightened to fix the blanking box 6 and the fourth bracket 211, and then the feeding process is directly carried out. When the new tray 215 is carried by the supporting piece 213 in the first bracket 26, the tray 215 in the fourth bracket 211 is lifted to the supporting piece 213 in the blanking box 6, and the process is repeated. When the first bracket 26, the second bracket 29, the third bracket 210 and the fourth bracket 211 complete the feeding, the material that has completed the heat treatment is in the blanking box 6, so that the feeding and blanking are completed at the same time. Compared with the conventional feeding and blanking by the mechanical arm, the feeding and blanking can be carried out at the same time, and the processing efficiency is improved.

[0043] Embodiment 2: please refer to Figures 1 to 7 Both sides of the feeding table 13 are fixedly provided with servo motors 217, the output shafts of the servo motors 217 are fixedly provided with second lead screws 218, the outer surfaces of the second lead screws 218 are spirally connected with screw sleeves 219, the screw sleeves 219 are fixedly provided with pushing rods 220, the other ends of the pushing rods 220 are fixedly provided with bidirectional electric push rods 221, and the pushing rods 220 and the butt joint holes 223 are arranged on the first bracket 26.

[0044] Further, the second mode assembly comprises a hydraulic rod 3 fixedly arranged on the annealing box 1, a rack 31 fixedly arranged on the output shaft of the hydraulic rod 3, and a gear 32 fixedly arranged on the top of the first lead screw 27.

[0045] The first bracket 26 is fixedly provided with a first guide 33 and a second guide 34 on both sides, the first bracket 26 is movably provided with a first connecting rod 35 on one side, the other end of the first connecting rod 35 is movably connected with the third bracket 210, the third bracket 210 is movably provided with a second connecting rod 36 on the side away from the first connecting rod 35, and the other end of the second connecting rod 36 is movably connected with the fourth bracket 211.

[0046] The first guide 33 and the second guide 34 are both curved, the curved part of the first guide 33 is located between the second bracket 29 and the third bracket 210, and the curved part of the second guide 34 is located between the third bracket 210 and the fourth bracket 211.

[0047] The first connecting rod 35 and the second connecting rod 36 are both two sections, and the two sections are movably provided with rollers 37 at the hinged parts, and the two rollers 37 are respectively located at the curved parts of the first guide 33 and the second guide 34.

[0048] On the basis of embodiment 1, when the feeding is completed, first, the fixing between the feeding table 13 and the first bracket 26 is released, then the supporting piece 213 is started to drive the second lead screw 218 to rotate, so that the second lead screw 218 drives the screw sleeve 219, the width of the installation space of the screw sleeve 219 and the second lead screw 218 is matched, so that the screw sleeve 219 avoids rotating during the movement process, the screw sleeve 219 will drive the push rod 220 to move, so that the bidirectional electric push rod 221 enters the embedded groove 222, the shaft body of the bidirectional electric push rod 221 is embedded into the butt joint hole 223 by starting the bidirectional electric push rod 221, and then the servo motor 217 is continuously started to make the push rod 220 push the first bracket 26, the second bracket 29, the third bracket 210 and the fourth bracket 211 into the processing position in the inner cavity of the annealing box 1, at this time the gear 32 is engaged with the rack 31, then the embedded groove of the bidirectional electric push rod 221 and the butt joint hole 223 is released, the servo motor 217 is started to make the push rod 220 reset;

[0049] Before the heat treatment, the lifting frame 11 is started to make the box door 12 close the annealing box 1, and then the hydraulic rod 3 is started to drive the rack 31 to move, which drives the gear 32. When the rack 31 is installed, the sliding block and sliding guide way can be used to improve the accuracy. When the gear 32 rotates, the first lead screw 27 rotates, the first lead screw 27 is movably installed on the first bracket 26, the second bracket 29 is screw-connected with the first lead screw 27, and the third bracket 210 and the fourth bracket 211 are movably installed with the first lead screw 27, so that the second bracket 29, the third bracket 210 and the fourth bracket 211 are jointly lifted. At this time, the distance between the first bracket 26 and the second bracket 29 is expanded. In the lifting process of the second bracket 29, the roller 37 on the first connecting rod 35 is first interfered and guided by the first guide 33, so that the first connecting rod 35 is unfolded, thereby lifting the third bracket 210, thereby expanding the distance between the second bracket 29 and the third bracket 210. When the third bracket 210 is lifted, the roller 37 on the second connecting rod 36 is interfered and guided by the second guide 34, so that the second connecting rod 36 is expanded, thereby moving the fourth bracket 211 upward, expanding the distance between the third bracket 210 and the fourth bracket 211. At this time, the distance between the first bracket 26, the second bracket 29, the third bracket 210 and the fourth bracket 211 is expanded, so that the bracket mechanism changes from the moving state to the processing state. During the heat treatment, the heat conduction effect can be improved, so that the blank 46 is heated more fully. On the other hand, when the first bracket 26, the second bracket 29, the third bracket 210 and the fourth bracket 211 enter and exit the annealing box 1, they can be reset to the moving state again. Compared with the processing state, the moving state of the bracket has a smaller distance and a lower height under the cooperation and limiting of the first lead screw 27, the first guide 33, the second guide 34, the first connecting rod 35 and the second connecting rod 36, so that the center of gravity of the bracket mechanism is lowered and the stability of the bracket during movement is improved. It should be noted that the processing position in the annealing box 1 can be provided with a positioning pin to position the bracket mechanism to prevent the bracket from shifting and shaking during state change.

[0050] Example 3: see Figure 5 , Figure 7 , Figure 8 , Figure 10 and Figure 12Further comprising a turnover assembly, which comprises a mounting plate 4 fixedly installed on the first bracket 26, the second bracket 29, the third bracket 210 and the fourth bracket 211, a plurality of sprockets 41 movably installed on the mounting plate 4, a rotating roller 42 fixedly installed at the middle part of the sprocket 41, a chain 43 in transmission connection with the outer surface of the sprocket 41, a clockwork box 44 fixedly installed on the first bracket 26, the second bracket 29, the third bracket 210 and the fourth bracket 211, a spring leaf shaft at the center of the clockwork box 44 in fixed connection with one sprocket 41, and a rocker 45 fixedly installed at the other end of the spring leaf shaft.

[0051] The tray 215 is provided with blank parts 46, the rotating roller 42 is between two blank parts 46, the rotating rollers 42 on both sides of the top plate 216 are mirror image arranged, the tray 215 is provided with a gap slot 47 matched with the rotating roller 42, so that the tray 215 can smoothly pass through the rotating roller 42 when feeding.

[0052] The first bracket 26, the second bracket 29, the third bracket 210 and the fourth bracket 211 are all fixedly installed with a supporting column 5, the supporting column 5 is sleeved with a return spring 51 on the outer circumferential side, and movably installed with a limiting piece 52, the other end of the limiting piece 52 is provided with a clamping groove 53 matched with the rocker 45, the surface of the limiting piece 52 is fixedly installed with a first linkage column 54, and the inner cavity of the annealing box 1 is provided with a second linkage column 55.

[0053] On the basis of Embodiment 2, before the bracket mechanism is sent into the inner cavity of the annealing box 1, a cleaning cloth can be selectively pasted on the surface of the rotating roller 42, and then the rocker 45 is rotated to make the spring leaf in the clockwork box 44 store force and make the rotating roller 42 rotate. In the present application, two rotating rollers 42 on one side of the top plate 216, one of which is in contact with the blank parts 46 on both sides, and the other rotating roller 42 is in contact with the blank parts 46 in the remaining row and keeps a distance from the blank parts 46 in other rows. When the rotating roller 42 rotates, it will drive the blank parts 46 to rotate, clean the lubricating oil and debris generated by cutting on the surface of the blank parts 46, and avoid carbonization of stains on the surface of the blank parts 46 during heating.

[0054] When the force accumulation is completed, the rocker 45 is positioned by the card slot 53, and the cleaning cloth on the surface of the rotating roller 42 is removed, and then the bracket mechanism is sent into the annealing box 1. When the bracket mechanism is sent into the inner cavity of the annealing box 1, the second linkage column 55 in the inner cavity of the annealing box 1 interferes with the first linkage column 54. One end of the reset spring 51 is fixed on the bracket, and the other end is fixed with the limiting piece 52. After the first linkage column 54 is interfered by the second linkage column 55, the limiting piece 52 will extrude the reset spring 51, so that the rocker 45 is separated from the card slot 53. Under the action of the elastic force generated by the spring plate restoring deformation, the chain wheel 41 and the chain 43 cooperate to drive the rotating roller 42, so that the rotating roller 42 drives the blank 46, and the blank 46 is turned over, so that the repeated parts of the blank 46 and the tray 215 cannot be heated, and the blank 46 can be more fully and uniformly heated, and the heat treatment effect is further improved. It should be noted that the spring force coefficient of the clockwork box 44 spring plate can be selected according to the weight of the blank 46, so that the spring plate can drive the rotating roller 42 to rotate the blank 46.

[0055] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, alternatives and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for heat treatment of ball cage blank, comprising an annealing box (1) and a feeding table (13), characterized in that: The upper feeding table (13) is provided with an upper feeding assembly below, which comprises an upper feeding mechanism and a bracket mechanism, the upper feeding mechanism comprises a bidirectional hydraulic cylinder (2) provided on the upper feeding table (13), a driving block (21) fixedly connected with the bidirectional hydraulic cylinder (2), a top rod (23) movably installed on the driving block (21), and an upper feeding disc (24) movably installed on the other end of the top rod (23); The bracket mechanism comprises a first bracket (26) provided on the upper feeding table (13), first screws (27) and limiting columns (28) arranged on the two sides of the first bracket (26), respectively, a second bracket (29), a third bracket (210) and a fourth bracket (211) movably arranged in sequence from bottom to top on the outer surface of the limiting column (28), and the first screw (27) is in screw connection with the second bracket (29) and in movable contact with the third bracket (210) and the fourth bracket (211); The first bracket (26), the second bracket (29), the third bracket (210) and the fourth bracket (211) are movably provided with supporting pieces (213) on the outer surfaces of the shafts (212), and the supporting pieces (213) are provided with trays (215), and the trays (215) are fixedly provided with top plates (216) in the middle portions of the trays (215); The second form assembly comprises a hydraulic rod (3) fixedly installed on the annealing box (1), a rack (31) fixedly installed on the output shaft of the hydraulic rod (3), and a gear (32) fixedly installed on the top of the first screw (27); The first bracket (26) is movably provided with a first connecting rod (35) on one side of the second bracket (29), the other end of the first connecting rod (35) is movably connected with the third bracket (210), the third bracket (210) is movably provided with a second connecting rod (36) on the side away from the first connecting rod (35), and the other end of the second connecting rod (36) is movably connected with the fourth bracket (211); The first guide (33) and the second guide (34) are both curved, the curved portion of the first guide (33) is located between the second bracket (29) and the third bracket (210), and the curved portion of the second guide (34) is located between the third bracket (210) and the fourth bracket (211). The first connecting rod (35) and the second connecting rod (36) are both two sections, and a roller (37) is movably installed at the hinge of the two sections, and the two rollers (37) are respectively located at the bending positions of the first guide (33) and the second guide (34), during the lifting of the second bracket (29), the roller (37) on the first connecting rod (35) is interfered and guided by the first guide (33), so that the first connecting rod (35) is unfolded, and the distance between the second bracket (29) and the third bracket (210) is expanded, during the lifting of the third bracket (210), the roller (37) on the second connecting rod (36) is interfered and guided by the second guide (34), so that the second connecting rod (36) is expanded, and the distance between the third bracket (210) and the fourth bracket (211) is expanded.

2. A device for heat treating a ball cage blank as defined in claim 1, wherein: The supporting piece (213) is semicircular, and a positioning rod (214) is arranged on the upper side of the supporting piece (213) and in movable contact with the upper surface of the supporting piece (213).

3. A device for heat treating a ball cage blank as defined in claim 1, wherein: The two sides of the feeding table (13) are fixedly provided with servo motors (217), the output shafts of the servo motors (217) are fixedly provided with second lead screws (218), the outer surfaces of the second lead screws (218) are spirally connected with screw sleeves (219), the screw sleeves (219) are fixedly provided with advancing rods (220), the other ends of the advancing rods (220) are fixedly provided with bidirectional electric push rods (221), and the first bracket (26) is provided with butt joint holes (223) matched with the advancing rods (220).

4. The device for heat treating a ball cage blank of claim 1, wherein: The feeding table (13) is provided with a turning assembly, the turning assembly comprises a mounting plate (4) fixedly installed on the first bracket (26), the second bracket (29), the third bracket (210) and the fourth bracket (211), a plurality of sprockets (41) movably installed on the mounting plate (4), a rotating roller (42) fixedly installed on the middle portion of each sprocket (41), a chain (43) in transmission connection with the outer surfaces of the sprockets (41), a clockwork box (44) fixedly installed on each of the first bracket (26), the second bracket (29), the third bracket (210) and the fourth bracket (211), a spring leaf shaft in the center of the clockwork box (44) fixedly connected with a sprocket (41), and a rocker (45) fixedly installed at the other end of the spring leaf shaft.

5. A device for heat treating a ball cage blank as defined in claim 4, wherein: The tray (215) is provided with blank parts (46), the rotating rollers (42) are located between the two blank parts (46), the rotating rollers (42) on the two sides of the top plate (216) are mirror image arranged, and the tray (215) is provided with a giving slot (47) matched with the rotating roller (42).

6. A device for heat treating a ball cage blank as defined in claim 4, wherein: The first bracket (26), the second bracket (29), the third bracket (210) and the fourth bracket (211) are fixedly provided with support columns (5), the outer circumferential side of the support column (5) is sleeved with a reset spring (51), and a limiting piece (52) is movably installed, the other end of the limiting piece (52) is provided with a clamping groove (53) matched with the rocker (45), the surface of the limiting piece (52) is fixedly provided with a first linkage column (54), the inner cavity of the annealing box (1) is provided with a second linkage column (55), one end of the reset spring (51) is fixed on the bracket, the other end is fixed with the limiting piece (52), after the first linkage column (54) is interfered by the second linkage column (55), the limiting piece (52) will extrude the reset spring (51), so that the rocker (45) is separated from the clamping groove (53), under the action of the elastic force generated by the spring piece restoring deformation, the sprocket (41) and the chain (43) will drive the rotating roller (42) to drive the rotating roller (42) to drive the blank (46).

7. A device for heat treating a ball cage blank as defined in claim 1, wherein: Further comprising a blanking assembly, which comprises a blanking box (6) arranged above the fourth bracket (211), the blanking box (6) is provided with a letting slot (61), the fourth bracket (211) and the blanking box (6) are fixedly provided with studs (62), the outer side of the stud (62) is sleeved with a tight plate (63), and the outer surface of the stud (62) is threadedly connected with a nut (64).

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