Synchronous transmission mold clamping device

Abstract

The present invention discloses a synchronous transmission mold clamping device, comprising a mounting base, a movable mold base, a fixed mold base, and a driving device; the driving device comprises two groups of pressure block chains and a force-increasing adjustment device; the two groups of pressure block chains are respectively arranged on the outside of the movable mold base; each group of pressure block chains comprises multiple groups of pressure blocks, and adjacent groups of pressure blocks are rotatably connected via a connecting shaft; the ends of the pressure blocks that contact the outer side surface of the movable mold base are provided with an arcuate surface; the curvature of the arcuate surface is the same as the curvature of the outer side surface of the movable mold base; the connecting shaft comprises a fixed connecting shaft and a movable connecting shaft; the two groups of pressure blocks located in the middle are rotatably connected via a fixed connecting shaft, and the fixed connecting shaft is fixed to the mounting base; the remaining two adjacent groups of pressure blocks are rotatably connected via a movable connecting shaft. The synchronous transmission mold clamping device of the present invention has good transmission synchronization, higher mold clamping efficiency, and better working effect.

Description

Technical Field

[0001] The present invention relates to a die clamping device, in particular to a synchronous transmission die clamping device. Background Art

[0002] Currently, existing die clamping force amplification devices use the up-and-down motion of a cylinder piston rod to drive connecting rods to act on the die base. Typically, one piston rod drives two or more connecting rods through a connecting shaft. To ensure the normal up-and-down motion of the piston rod, a large gap exists between the connecting shaft and the connecting rods. This gap causes the piston rod to apply varying forces (either too large or too small) to different connecting rods. When the force acting on the connecting rod is too small, the force exerted on the die base by the connecting rod is also too small, resulting in insufficient clamping force on the workpiece.

[0003] In addition, the mold clamping device driven by the connecting rod relies on the rotation of the connecting rod around a fixed point to obtain the force-enhancing effect. This results in the connecting rod and the mold base not being in vertical contact, but having a certain angle in the vertical direction, that is, the direction of the force is inclined downward. After decomposing this force, a horizontal friction force and a vertical pressure will be generated. Among them, the horizontal friction force will cause the mold base to produce a small horizontal displacement, which will make it impossible to accurately align the mold bases, resulting in insufficient contact between the mold base and the workpiece, and thus causing insufficient clamping force.

[0004] In addition, the existing mold clamping device relies on the elastic parts set between the mold bases or the structural cooperation between the mold base and the connecting rod to reset the mold base. This reset method causes a large force opposite to the mold clamping pressure when clamping the mold, which makes the force output by the cylinder and the actual force have a large deviation, and then the force applied to the workpiece when it is clamped is lower than expected, thereby causing insufficient clamping force, thereby affecting the mold clamping effect; this requires the cylinder to output a larger force to ensure sufficient clamping force. Summary of the Invention

[0005] In order to overcome the deficiencies in the prior art, the present invention provides a synchronous transmission mold clamping device, which has good transmission synchronization, higher mold clamping efficiency and better effect.

[0006] The technical solution of the present invention to solve the above technical problems is:

[0007] A synchronous transmission mold clamping device comprises a mounting base, a movable mold base arranged on the mounting base, a fixed mold base and a driving device for driving the movable mold base and the fixed mold base to close and open the mold; wherein,

[0008] There are two groups of movable mold bases, which are respectively arranged on the upper and lower sides of the fixed mold base;

[0009] The driving device includes two sets of pressure block chains and a force-increasing adjustment device, wherein:

[0010] Two groups of pressure block chains are respectively arranged on the outer sides of the movable mold base; each group of pressure block chains includes multiple groups of pressure blocks, and adjacent groups of pressure blocks are rotatably connected by connecting shafts; wherein, the ends of the pressure blocks that contact the outer side surfaces of the movable mold base are provided with arcuate surfaces; the curvature of the arcuate surfaces is the same as the curvature of the outer side surfaces of the movable mold base; the connecting shaft includes a fixed connecting shaft and a movable connecting shaft; the two groups of pressure blocks located in the middle are rotatably connected by the fixed connecting shaft, and the fixed connecting shaft is fixed to the mounting base; the remaining two adjacent groups of pressure blocks are rotatably connected by the movable connecting shaft;

[0011] The force-boosting adjustment device is used to drive the two sides of the upper and lower pressure block chains to close inward around the fixed connection axis in the pressure block chain, thereby applying pressure to the outer side surface of the movable mold base to promote the movable mold base and the fixed mold base to close the mold; or drive the two sides of the upper and lower pressure block chains to expand outward around the fixed connection axis in the pressure block chain, thereby releasing the pressure applied to the outer side surface of the movable mold base.

[0012] Preferably, the pressure blocks are four groups, including two groups of first pressure blocks located in the middle position and two groups of second pressure blocks located on the outside, wherein the two groups of first pressure blocks are connected by a fixed connecting shaft; the first pressure blocks and the second pressure blocks are connected by a movable connecting shaft.

[0013] Preferably, the force-boosting adjustment device includes second wedge blocks arranged on both sides of the pressure block chain and a synchronous driving mechanism for driving the two groups of second wedge blocks to move toward or in opposite directions along the X-axis direction, wherein a second sliding groove is provided at the bottom of the mounting seat, and a second guide portion is provided at the bottom of the second wedge block, and the second guide portion is installed in the second sliding groove; a driving shaft is provided on the end of the second pressure blocks on both sides away from the movable connecting shaft; and vertically arranged driving grooves are provided on the two groups of second wedge blocks, and the driving shaft extends into the driving grooves of the corresponding second wedge blocks.

[0014] Preferably, the synchronous drive mechanism includes a pressure plate, a first wedge block arranged on both sides of the pressure plate, and a driving cylinder for driving the pressure plate to move downward along the Z-axis direction, wherein the driving cylinder is installed on the mounting seat, and the piston rod of the driving cylinder is connected to the pressure plate; the inclined surface of the first wedge block and the inclined surface of the second wedge block are tangent.

[0015] Preferably, the mounting seat is provided with a reset electromagnet on a side close to the second wedge block, and the second wedge block is made of magnetic material; when it is necessary to release the pressure applied by the pressure block chain to the movable mold base, the reset electromagnet drives the second wedge block to move in a direction away from the fixed mold base.

[0016] Preferably, the driving device also includes a pressure block gap adjustment device for adjusting the gap between the first pressure block or the second pressure block and the outer side surface of the movable mold base, and the pressure block gap adjustment device includes a third wedge block, a pressure block adjustment rod and a telescopic head arranged on the third wedge block, wherein the third wedge block is divided into two groups, and the two groups of third wedge blocks are respectively arranged on both sides of the pressure block chain; the mounting seat is provided with a third sliding groove at the bottom of the third wedge block, and the bottom of the third wedge block is provided with a third guide part, and the third guide part is installed in the third sliding groove; the third wedge block is provided with a mounting groove; the telescopic head is installed in the mounting groove; the pressure block adjustment rod is divided into two groups, and the two groups of pressure block adjustment rods are respectively arranged on both sides of the pressure block chain. One end of the telescopic head is hinged on a rotating shaft, and the rotating shaft is installed at one end of the telescopic head; wherein, the third wedge block is provided with a cylindrical block between the two groups of pressure block adjusting rods; a torsion spring is provided on the rotating shaft, and the elastic force of the torsion spring prompts the two groups of pressure block adjusting rods to clamp the upper and lower sides of the cylindrical block; the other end of the telescopic head extends outside the inclined surface of the third wedge block; wherein, a telescopic spring is provided between the telescopic head and the third wedge block, one end of the telescopic spring acts on the third wedge block, and the other end acts on the telescopic head; the elastic force of the telescopic spring prompts the telescopic head to extend outside the inclined surface of the third wedge block; the end part of the telescopic head extending outside the inclined surface of the third wedge block is an arc-shaped part.

[0017] Preferably, a position adjustment mechanism is further provided between the first wedge block and the pressure plate for driving the first wedge block to move along the X-axis direction to adjust the position of the first wedge block, wherein the first wedge block is slidably connected to the pressure plate; the position adjustment mechanism includes a track-changing electromagnet provided on the mounting seat, and the track-changing electromagnet is mounted on the mounting seat; the first wedge block is made of magnetic material; a lane-changing spring is provided between the first wedge block and the mounting seat, one end of the lane-changing spring acts on the pressure plate, and the other end acts on the first wedge block; the elastic force of the lane-changing spring causes the first wedge to The inclined surface of the block is tangent to the inclined surface of the second wedge block; when it is necessary to adjust the gap between the second pressure block and the movable mold base, the track-changing electromagnet prompts the first wedge block to move along the X-axis direction to a position tangent to the inclined surface of the third wedge block, and moves tangentially to the inclined surface of the third wedge block under the drive of the driving cylinder; when it is necessary to adjust the gap between the first pressure block and the movable mold base, the track-changing electromagnet prompts the first wedge block to move along the X-axis direction to a position tangent to the arc-shaped portion of the telescopic head, and moves tangentially to the arc-shaped portion of the telescopic head under the drive of the driving cylinder.

[0018] Preferably, a return spring is provided between the third wedge-shaped block and the mounting seat, one end of the return spring acts on the mounting seat, and the other end acts on the third wedge-shaped block.

[0019] Preferably, the mounting seat is provided with a guide block on the outer side of the first wedge block, and the guide block is vertically provided with a first guide groove, a second guide groove and a third guide groove, the first guide groove and the second guide groove are connected through a first reversing groove; the second guide groove and the third guide groove are connected through a second reversing groove; the first guide groove, the second guide groove and the third guide groove are connected through a third reversing groove; a first guide portion is provided on the first wedge block; the width of the first guide portion is the same as the width of the first guide groove, the second guide groove and the third guide groove, and the length is the same as the width of the first reversing groove, the second reversing groove and the third reversing groove.

[0020] Preferably, there are two groups of driving devices, which are symmetrically arranged on the front and rear sides of the mounting seat.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0022] 1. The pressure block chain in the synchronous transmission clamping device of the present invention is symmetrically distributed above the movable mold base. When the mold is closed, the multiple pressure blocks in the pressure block chain are in close contact with the upper surface of the movable mold base and are symmetrically distributed. The final resultant force is directed vertically downward, and the horizontal force components are offset by each other, thereby ensuring the clamping effect on the workpiece.

[0023] 2. The synchronous transmission clamping device of the present invention applies force to the movable mold base in a manner that multiple pressure blocks apply force to the movable mold base during mold closing. Compared with the traditional single lever applying force to the movable mold base, the applied force has a wider range of action on the movable mold base and a better effect. Moreover, since the force is transmitted in a longitudinal manner, the problem of insufficient clamping force on the workpiece due to too small a clamping force can be avoided, thereby ensuring that the clamping force on the workpiece remains consistent each time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the planar structure of the synchronous transmission mold clamping device of the present invention when the mold is opened;

[0025] Figure 2 It is a schematic diagram of the planar structure of the synchronous transmission mold clamping device of the present invention during mold closing;

[0026] Figure 3 This is a schematic diagram of the planar structure of the pressure block adjusting rod in the present invention adjusting the second pressure block (the second wedge block is not shown);

[0027] Figure 4 Schematic diagram of the three-dimensional structure of the first pressing block when the pressing block adjusting rod in the present invention adjusts the first pressing block (the second wedge block is not shown);

[0028] Figure 5 A cross-sectional view showing the relative positions of the first wedge block, the second wedge block and the third wedge block in the present invention;

[0029] Figure 6 for Figure 5 A partial enlarged cross-sectional view at point D in FIG.

[0030] Figure 7 Schematic diagram of the inclined surface structure of the third wedge block in the present invention;

[0031] Figure 8 is a cross-sectional view of the internal structure of the third wedge-shaped block in the present invention;

[0032] Figure 9 Schematic diagram of the distribution of the first reversing groove, the second reversing groove and the third reversing groove on the guide block in the present invention;

[0033] Figure 10 Schematic diagram of the three-dimensional structure of the briquetting chain in the present invention;

[0034] Figure 11Schematic diagram of the three-dimensional structure of the fixed mold base and the movable mold base in the present invention;

[0035] Figure 12 Schematic diagram of the position structure of the reset electromagnet and the reset spring in the present invention;

[0036] Figure 13 It is a working flow chart of the synchronous transmission clamping device of the present invention. DETAILED DESCRIPTION

[0037] The present invention will be described in further detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto. Figures 1-13 The synchronous transmission mold clamping device of the present invention includes a mounting base 3, a movable mold base 12 arranged on the mounting base 3, a fixed mold base 11, and a driving device for driving the movable mold base 12 and the fixed mold base 11 to close and open the mold; wherein,

[0038] There are two groups of driving devices, which are symmetrically arranged on the front and rear sides of the mounting base 3;

[0039] There are two groups of movable mold bases 12, which are respectively arranged on the upper and lower sides of the fixed mold base 11; the outer side surface of the movable mold base 12 is an arc surface;

[0040] The driving device includes two sets of pressure block chains 10 and a force-increasing adjustment device, wherein:

[0041] Two groups of pressure block chains 10 are respectively arranged on the outside of the movable mold base 12; each group of pressure block chains 10 includes multiple groups of pressure blocks, and the adjacent groups of pressure blocks are rotatably connected by a connecting shaft; wherein, the end of the pressure block in contact with the outer side surface of the movable mold base 12 is provided with an arc surface; the curvature of the arc surface is the same as the curvature of the outer side surface of the movable mold base 12; the connecting shaft includes a fixed connecting shaft 1004 and a movable connecting shaft 1003; the two groups of pressure blocks located in the middle position are rotatably connected by the fixed connecting shaft 1004, The fixed connecting shaft 1004 is fixed to the mounting base 3; the other two adjacent groups of pressing blocks are rotatably connected via a movable connecting shaft 1003; in this embodiment, there are four groups of pressing blocks, including two groups of first pressing blocks 1001 located in the middle and two groups of second pressing blocks 1002 located on the outside, wherein the two groups of first pressing blocks 1001 are connected via a fixed connecting shaft 1004; the first pressing block 1001 and the second pressing block 1002 are connected via a movable connecting shaft 1003;

[0042] The force-boosting adjustment device is used to drive the two sides of the upper and lower groups of pressure block chains 10 to close inward around the fixed connecting shaft 1004 in the pressure block chain 10, so as to apply pressure to the outer side of the movable mold base 12, so as to promote the movable mold base 12 and the fixed mold base 11 to close the mold; or drive the two sides of the upper and lower groups of pressure block chains 10 to expand outward around the fixed connecting shaft 1004 in the pressure block chain 10, so as to release the pressure applied to the outer side of the movable mold base 12; wherein, the force-boosting adjustment device includes a second wedge block 6 arranged on both sides of the pressure block chain 10 and a synchronous driving mechanism for driving the two groups of second wedge blocks 6 to move toward or in opposite directions along the X-axis direction, wherein,

[0043] The bottom of the mounting seat 3 is provided with a guide rail 9, and a second sliding groove 901 is provided on the guide rail 9. The bottom of the second wedge block 6 is provided with a second guide portion, and the second guide portion is installed in the second sliding groove 901; a driving shaft is provided on the end of the second pressure blocks 1002 on both sides away from the movable connection shaft 1003; the two groups of second wedge blocks 6 are provided with vertically arranged driving grooves 601, and the driving shaft extends into the driving grooves 601 of the corresponding second wedge blocks 6; the synchronous driving mechanism includes a pressing plate 4, a first wedge block 5 arranged on both sides of the pressing plate 4 and a driving cylinder 1 for driving the pressing plate 4 to move downward along the Z-axis direction, wherein the driving cylinder 1 is installed on the mounting seat 3, and the piston rod 2 of the driving cylinder 1 is connected to the pressing plate 4; the inclined surface of the first wedge block 5 and the inclined surface of the second wedge block 6 are tangent;

[0044] When the synchronous transmission mold clamping device of the present invention is in use, the driving cylinder 1 is started, the piston rod 2 of the driving cylinder 1 is extended and moves downward. Since the piston rod 2 of the driving cylinder 1 is fixedly connected to the pressure plate 4 and the pressure plate 4 is slidably connected to the first wedge block 5 (that is, the dovetail groove structure below), the downward movement of the piston rod 2 can drive the first wedge block 5 to move downward, and the inclined surface of the first wedge block 5 is tangent to the inclined surface of the second wedge block 6, so the second wedge block 6 moves toward the direction of the fixed mold base 11; since the driving shaft is inserted into the driving groove 601 of the second wedge block 6 and is rotatably connected to the second pressure block 1002 located on the outside, at this time, the driving shaft will drive the second pressure block 1002 located on the outside to move downward while rotating around the movable connection shaft 1003 during the process of moving from the top of the driving groove 601 to the middle direction; one end of the first pressure block 1001 is connected to the fixed connection shaft 1004 fixed on the mounting seat 3 The first pressing block 1001 is rotated around the fixed connecting shaft 1004 in the direction close to the fixed mold base 11, and finally the arc surface of the lower end of the first pressing block 1001 and the second pressing block 1002 is closely fitted with the outer side surface of the movable mold base 12, thereby achieving mold closing. When the mold needs to be opened, the piston rod 2 of the driving cylinder 1 is retracted, that is, the piston rod 2 moves upward. At this time, under the action of the piston rod 2, the first wedge block 5 moves upward. At the same time, the reset electromagnet 16 is energized and drives the second wedge block 6 to move in the direction away from the fixed mold base 11. Specifically, since the second wedge block 6 is magnetic, the second wedge block 6 moves in the direction away from the fixed mold base 11 under the action of the magnetic field force, thereby pulling the pressing block chain 10 away from the outer side surface of the movable mold base 12. Therefore, the pressing block chain 10 moves from the arc (such as Figure 2 As shown) is expanded into a straight line (as Figure 1 As shown), at this time, the magnetic poles of the second electromagnet 120 on the movable mold base 12 repel the magnetic poles of the first electromagnet 110 on the fixed mold base 11. Under the action of the magnetic field force, the movable mold base 12 moves away from the fixed mold base 11 to achieve mold opening.

[0045] See also Figures 1-13 The driving device further includes a pressure block gap adjustment device for adjusting the gap between the first pressure block 1001 and the second pressure block 1002 and the outer side surface of the movable mold base 12, and the pressure block gap adjustment device includes a third wedge block 7, two sets of pressure block adjustment rods 702 and a telescopic head 701 provided on the third wedge block 7, wherein,

[0046] The third wedge block 7 is divided into two groups, and the two groups of third wedge blocks 7 are respectively arranged on both sides of the pressure block chain 10; the mounting seat 3 is provided with a third sliding groove 903 at the bottom of the third wedge block 7, and the bottom of the third wedge block 7 is provided with a third guide portion, and the third guide portion is installed in the third sliding groove 903; a mounting groove 704 is provided in the third wedge block 7; the telescopic head 701 is installed in the mounting groove 704; one end of the two groups of pressure block adjustment rods 702 is hinged on the rotating shaft 703, and the rotating shaft 703 is installed at one end of the telescopic head 701; wherein, the third wedge block 7 is provided with a cylindrical Block 15; a torsion spring is provided on the rotating shaft 703, and the elastic force of the torsion spring prompts the two sets of pressure block adjustment rods 702 to be clamped on the upper and lower sides of the cylindrical block 15; the other end of the telescopic head 701 extends outside the inclined surface of the third wedge block 7; wherein, a telescopic spring 705 is provided between the telescopic head 701 and the third wedge block 7, one end of the telescopic spring 705 acts on the third wedge block 7, and the other end acts on the telescopic head 701; the elastic force of the telescopic spring 705 prompts the telescopic head 701 to extend outside the inclined surface of the third wedge block 7; the end of the telescopic head 701 extending outside the inclined surface of the third wedge block 7 is provided with an arc portion;

[0047] A return spring 16 is provided between the third wedge block 7 and the mounting seat 3. One end of the return spring 16 acts on the mounting seat 3, and the other end acts on the third wedge block 7.

[0048] A position adjustment mechanism is further provided between the first wedge block 5 and the pressure plate 4 for driving the first wedge block 5 to move along the X-axis direction to adjust the position of the first wedge block 5, wherein the pressure plate 4 is provided with a dovetail groove extending along the X-axis direction, and the first wedge block 5 is provided with a mounting portion that cooperates with the dovetail groove; the position adjustment mechanism includes a track-changing electromagnet 501 provided on the mounting seat 3, and the track-changing electromagnet 501 is mounted on the mounting seat 3; the first wedge block 5 is made of magnetic material; a lane-changing spring 502 is provided between the first wedge block 5 and the mounting seat 3, one end of the lane-changing spring 502 acts on the pressure plate 4, and the other end acts on the first wedge block 5; the elastic force of the lane-changing spring 502 causes the inclined surface of the first wedge block 5 to be tangent to the inclined surface of the second wedge block 6;

[0049] When there is a gap between the first pressing block 1001 and the outer side surface of the movable mold base 12, the driving cylinder 1 drives the inclined surface of the first wedge block 5 to contact the inclined surface of the side of the third wedge block 7 with the telescopic head 701 (i.e., the first contact surface) and press the third wedge block 7 downward. Under the action of the first wedge block 5, the telescopic head 701 moves toward the direction close to the fixed mold base 11, and the pressing block adjusting rod 702 opens (as shown in FIG. Figure 4 As shown) and contacts and squeezes the first pressure block 1001, after the lower surface of the first pressure block 1001 is in close contact with the outer side surface of the movable mold base 12, the first wedge block 5 is separated from the third wedge block 7, and the telescopic spring 705 pushes the telescopic head 701 to move away from the fixed mold base 11, and finally protrudes out of the inclined surface of the third wedge block 7. Under the action of the return spring 16, the third wedge block 7 moves away from the fixed mold base 11 and finally returns to its original position.

[0050] When there is a gap between the second pressing block 1002 and the movable mold base 12, the driving cylinder 1 drives the inclined surface of the first wedge block 5 to contact the smooth inclined surface of the third wedge block 7 (the side without the telescopic head 701 is the second contact surface) and press the third wedge block 7 downward, so that the third wedge block 7 moves toward the direction close to the fixed mold base 11, and the pressing block adjusting rod 702 contacts and squeezes the second pressing block 1002 (as shown in FIG. Figure 4 As shown), after the lower surface of the second pressure block 1002 is in close contact with the upper surface of the movable mold base 12, the track-changing electromagnet 501 loses power, and under the elastic force of the track-changing spring 502, the first wedge block 5 is separated from the third wedge block 7; the third wedge block 7 moves away from the fixed mold base 11 under the action of the return spring 16, and finally returns to its original position.

[0051] See also Figures 1-13, the mounting seat 3 is provided with a guide block 8 on the outer side of the first wedge block 5, and the guide block 8 is vertically provided with a first guide groove 801, a second guide groove 802 and a third guide groove 803, the first guide groove 801 and the second guide groove 802 are connected through a first reversing groove A; the second guide groove 802 and the third guide groove 803 are connected through a second reversing groove B; the first guide groove 801, the second guide groove 802 and the third guide groove 803 are connected through a third reversing groove C; a first guide portion is provided on the first wedge block 5; the width of the first guide portion is the same as the width of the first guide groove 801, the second guide groove 802 and the third guide groove 803, and the length is the same as the first reversing groove A, the width of the second reversing groove B and the third reversing groove C are the same; in this way, the first wedge block 5 can enter the first guide groove 801, the second guide groove 802 and the third guide groove 803 through the first reversing groove A, the second reversing groove B and the third reversing groove C; since the lane-changing spring 502 is arranged in the dovetail groove; when the lane-changing spring 502 is in a compressed state, its elastic force is in the direction away from the mounting seat 3, and since a track-changing electromagnet 501 is provided between the first wedge block 5 and the mounting seat 3, and the first wedge block 5 is made of magnetic material, under normal working conditions, when the inclined surface of the first wedge block 5 is tangent to the inclined surface of the second wedge block 6, the electromagnetic force F of the track-changing electromagnet 501 when it is not energized. 磁502 = 0; the first wedge block 5 cooperates with the first guide groove 801 under the elastic force of the lane changing spring 502. At this time, the elastic force F of the lane changing spring 502 is 弹 >F 磁502 ;

[0052] When the first wedge block 5 needs to change track, the track-changing electromagnet 501 is energized, and the first wedge block 5 moves to the first reversing slot A or the second reversing slot B. 磁502 >F 弹 Under the action of the magnetic field force, the first guide portion of the first wedge block 5 will enter the second guide groove 802 or the third guide groove 803; when the first wedge block 5 needs to return from the second guide groove 802 or the third guide groove 803 to the first guide groove 801, the first wedge block 5 moves to the position of the third reversing groove C. At this time, F 磁502 Reduce to 0, that is, F 弹 >F 磁502 ; The first wedge block 5 cooperates with the first guide groove 801, that is, the first wedge block 5 will be tangent to the inclined surface of the second wedge block 6.

[0053] See also Figures 1-13The fixed mold base 11 is provided with first electromagnets 110 at the four diagonal positions; the movable mold base 12 is provided with second electromagnets 120 at the four diagonal positions corresponding to the first electromagnets 110 of the fixed mold base 11; by controlling the magnetic force of the corresponding electromagnets, the position of the movable mold base 12 is adjusted so that the fixed mold base 11 and the movable mold base 12 are aligned. In addition, by adjusting the magnetic poles of the first electromagnet 110 and the second electromagnet 120, the mold opening and closing are achieved; in addition, to further ensure the mold closing accuracy, the second wedge block 6 is provided with positioning rods 13, and the positioning rods 13 are divided into two groups, and the two groups of positioning rods 13 are arranged up and down and extend horizontally along the Y-axis direction; the movable mold base 12 is provided with positioning holes 14. When the fixed mold base 11 and the movable mold base 12 are aligned, the second wedge blocks 6 on both sides move toward each other, thereby inserting the positioning rods 13 into the positioning holes 14 of the movable mold base 12.

[0054] See also Figures 1-13 The control method of the synchronous transmission clamping device of the present invention is as follows:

[0055] Step 1:

[0056] When closing the mold, the driving cylinder 1 pushes the piston rod 2 downward, thereby driving the pressing plate 4 and the first wedge block 5 installed on the pressing plate 4 to move downward. Since the inclined surface of the first wedge block 5 is tangent to the inclined surface of the second wedge block 6, the second wedge block 6 can be driven to move toward the fixed mold base 11. At this time, the magnetic field force F at each position on the fixed mold base 11 and the movable mold base 12 is 磁 Gradually increase to F 磁 = a, the mold is closed; if the positioning rod 13 on the second wedge block 6 does not enter the corresponding positioning hole 14 on the movable mold base 12, it indicates that the movable mold base 12 and the fixed mold base 11 are not aligned, so the piston rod 2 moves upward, and the magnetic field force between the movable mold base 12 and the fixed mold base 11 is reduced to F 磁 =0, and make adjustments based on the following five judgment conditions:

[0057] (1): Axial offset L of the movable die holder 12 relative to the fixed die holder 11 轴 ≥0, it is determined that the movable mold base 12 is offset to the left relative to the fixed mold base 11.

[0058] (1-1): The radius R of the movable mold base 12 is less than 3L 轴 At this time, the deviation distance between the movable mold base 12 and the fixed mold base 11 is large. From t0 to t0+△t1, the magnetic field force on the right side of the movable mold base 12 increases to 2a, that is, F 右磁=2a, at this time the movable mold base 12 is accelerated to move to the right under the action of the magnetic field force; at the moment t0+△t1, the axial offset between the movable mold base 12 and the fixed mold base 11 is 3L 轴 <R; During the time period from t0+△t1 to t0+△t2, the magnetic field force on the right side of the movable mold base 12 is reduced to a / 2, that is, F 右磁 =a / 2, the movable mold base 12 decelerates and moves in the specified direction; at the time t0+△t2, the movable mold base 12 reaches the specified position, and the magnetic field forces on both sides of the movable mold base 12 and the fixed mold base 11 increase to a, that is, F 磁 =a, at this time the two sides of the movable mold base 12 and the fixed mold base 11 are aligned;

[0059] (1-2): The radius R of the movable mold base 12 is greater than 3L 轴 At this time, the deviation distance between the movable mold base 12 and the fixed mold base 11 is relatively close. From t0 to t0+△t3, the magnetic field force on the right side of the movable mold base 12 increases to a / 2, and the movable mold base 12 slowly moves to the designated position. From t0+△t3 to t0+△t4, the movable mold base 12 reaches the designated position, and the magnetic field forces on both sides of the movable mold base 12 and the fixed mold base 11 increase to a, that is, F 磁 Equal to a; the movable mold base 12 and the fixed mold base 11 are aligned on both sides;

[0060] (1-2): Axial offset L of the movable die holder 12 relative to the fixed die holder 11 轴 <0, it is determined that the movable mold base 12 is offset to the right relative to the fixed mold base 11;

[0061] (1-21): Radius R of movable mold base 12<|3L 轴 |, at this time, the deviation distance between the movable mold base 12 and the fixed mold base 11 is large, and the magnetic field force on the left side of the movable mold base 12 increases to 2a from t0 to t0+△t1, that is, F 左磁 =2a, at this time the movable mold base 12 is accelerated to move to the left under the action of the magnetic field force, and the axial offset between the movable mold base 12 and the fixed mold base 11 at time t0+△t1 is |3L 轴 |<R, from t0+△t1 to t0+△t2, the magnetic field force on the left side of the movable mold base 12 is reduced to a / 2, that is, F 左磁 =a / 2, the movable mold base 12 decelerates and moves in the specified direction; at the time t0+△t2, the movable mold base 12 reaches the specified position, and the magnetic field forces on both sides of the movable mold base 12 and the fixed mold base 11 increase to a, that is, F 磁 =a, at this time the two sides of the movable mold base 12 and the fixed mold base 11 are aligned;

[0062] (1-21): Radius R of movable mold base 12>|3L 轴|, at this time, the deviation distance between the movable mold base 12 and the fixed mold base 11 is relatively close. From t0 to t0+△t3, the magnetic field force on the left side of the movable mold base 12 increases to a / 2. The movable mold base 12 slowly moves to the designated position. At t0+△t3, the movable mold base 12 reaches the designated position. The magnetic field forces on both sides of the movable mold base 12 and the fixed mold base 11 increase to a, that is, F 磁 =a, at this time the two sides of the movable mold base 12 and the fixed mold base 11 are aligned;

[0063] (1-3): Axial offset L of movable die base 12 轴 =0, radial offset L 径 ≥0, it is determined that the movable mold base 12 is offset forward.

[0064] (1-31): Movable die base 12 radius R<2L 径 The radial offset distance of the movable die holder 12 relative to the fixed die holder 11 is relatively far, and the magnetic field force behind the movable die holder 12 increases to F during the time from t0 to t0+△t4. 后磁 =2a, the movable mold base 12 moves quickly to the designated position, at t0+△t4, R≥|2L 径 At this time, the radial offset distance of the movable mold base 12 relative to the fixed mold base 11 is small. To prevent the movable mold base 12 from being unable to stop due to inertia after reaching the specified position, causing the movable mold base 12 to deviate backward relative to the fixed mold base 11, the magnetic field force on the rear side of the movable mold base 12 gradually decreases to a / 2 from t0+△t4 to t0+△t5, that is, F 后磁 =a / 2, within the time t0+△t5, the movable mold base 12 decelerates and moves to the specified position, the movable mold base 12 and the fixed mold base 11 are aligned, and the piston rod 2 moves downward.

[0065] (1-32): Movable die base 12 radius R ≥ 2L 径,， The radial offset distance of the movable mold base 12 relative to the fixed mold base 11 is small. During the time period from t0 to t0+△t6, the magnetic field force on the rear side of the movable mold base 12 increases to F 后磁 =a / 2, the movable mold base 12 moves to the designated position. After the movable mold base 12 reaches the designated position, the magnetic field forces on both sides of the movable mold base 12 and the fixed mold base 11 increase to a, that is, F 磁 =a, at this time, the two sides of the movable mold base 12 and the fixed mold base 11 are aligned; the piston rod 2 moves downward.

[0066] (1-4): Axial offset L of movable die base 12 轴 =0, radial offset L 径 <0, it is judged that the movable mold base 12 is offset backward.

[0067] (1-41): Movable mold base 12 radius R<|2L 径|, the radial offset distance of the movable mold base 12 relative to the fixed mold base 11 is relatively far, and the magnetic field force on the front side of the movable mold base 12 increases to F during the time from t0 to t0+△t4. 前磁 =2a, the movable mold base 12 moves quickly to the designated position, at t0+△t4, R≥|2L 径 At this time, the radial offset distance of the movable mold base 12 relative to the fixed mold base 11 is small. In order to prevent the movable mold base 12 from being unable to stop due to inertia after reaching the specified position, thereby causing the movable mold base 12 to deviate forward relative to the fixed mold base 11, the magnetic field force on the front side of the movable mold base 12 gradually decreases to a / 2 from t0+△t4 to t0+△t5, that is, F 前磁 =a / 2; at time t0+△t5, after the movable mold base 12 decelerates and moves to the specified position, the two sides of the movable mold base 12 and the fixed mold base 11 are aligned; the magnetic field forces on both sides of the movable mold base 12 and the fixed mold base 11 increase to a, that is, F 磁 =a, the piston rod 2 moves downward.

[0068] (1-42): Radius of movable mold base 12 R≥|2L 径 | ,， The radial offset distance of the movable mold base 12 relative to the fixed mold base 11 is small. During the time period from t0 to t0+△t6, the magnetic field force on the front side of the movable mold base 12 increases to F 前磁 =a / 2, the movable mold base 12 moves to the designated position. After the movable mold base 12 reaches the designated position, the two sides of the movable mold base 12 and the fixed mold base 11 are aligned; the magnetic field forces on both sides of the movable mold base 12 and the fixed mold base 11 increase to a, that is, F 磁 =a, the piston rod 2 moves downward.

[0069] (1-5): The axial offset and radial offset of the movable mold base 12 are both 0, that is, L 轴 =0,L 径 =0, and the positioning rod 13 does not enter the positioning hole 14, the device reports an error, starts the alarm mode, and reminds the worker to check the error.

[0070] Step 2

[0071] When the positioning rod 13 on the second wedge block 6 enters the positioning hole 14 on the movable mold base 12, that is, after the mold base is aligned, the piston rod 2 continues to move downward, pushing the first wedge block 5 downward, thereby driving the second wedge block 6 to move toward the fixed mold base 11. While the second wedge block 6 moves toward the fixed mold base 11, it drives the first pressure block 1001 and the second pressure block 1002 to rotate around the fixed connecting shaft 1004 and the movable connecting shaft 1003 respectively, and finally makes the arc-shaped surface of the lower end of the first pressure block 1001 and the second pressure block 1002 close to the outer side surface of the movable mold base 12. At this time, the gap detection device on the movable mold base 12 detects whether the gap C between the lower surface of the pressure block and the outer side surface of the movable mold base 12 is greater than 0. When C>0, it is judged and adjusted according to the following two situations.

[0072] (2-1): If the gap C1 between the first pressure block 1001 and the movable mold base 12 is greater than 0, the piston rod 2 moves up to the first reversing groove A. Under the action of the lane-changing spring 502, the first wedge block 5 moves from the first guide groove 801 to the second guide groove 802, that is, the first wedge block 5 is separated from the second wedge block 6 and contacts the first contact surface of the third wedge block 7. During the time period from t0 to t0+△t6, the third wedge block 7 accelerates toward the fixed mold base 11, and the acceleration α is greater than 0. During the time period from t0+△t6, the inclined surface of the first wedge block 5 is The telescopic head 701 on the third wedge block 7 is squeezed, and the angle between the pressure block adjustment rod 702 and the first pressure block 1001 is increased. To reduce the collision between the pressure block adjustment rod 702 and the first pressure block 1001, the third wedge block 7 is decelerated from time t0+Δt6 to time t0+Δt7, with acceleration α less than 0. At time t0+Δt7, C1 gradually decreases to 0, and the piston rod 2 moves upward, driving the first wedge block 5 to move up to the third reversing groove C. Under the elastic force of the lane change spring 502, the first wedge block 5 returns to the first guide groove 801.

[0073] (2-2): If the gap C2 between the second pressure block and the movable die holder 12 is greater than 0, the piston rod 2 moves upward to the second reversing groove B. Under the action of the lane-changing spring 502, the first wedge block 5 moves from the first guide groove 801 to the third guide groove 803, that is, the first wedge block 5 is separated from the second wedge block 6 and contacts the second contact surface of the third wedge block 7. From t0 to t0+△t7, the third wedge block 7 accelerates toward the fixed die holder 11, and the acceleration α is greater than 0. At t0+△t At time t0+Δt7, the pressure block adjusting rod 702 contacts the second pressure block 1002. To reduce the collision between the pressure block adjusting rod 702 and the second pressure block 1002, the third wedge block 7 decelerates from time t0+Δt7 to time t0+Δt8, with acceleration α < 0. At time t0+Δt8, C2 gradually decreases to 0, the piston rod 2 moves upward and drives the first wedge block 5 to move upward to the third reversing groove C. Under the elastic force of the lane change spring 502, the first wedge block 5 returns to the first guide groove 801.

[0074] (2-3): When the gap C between the lower surface of the first pressure block 1001 and the second pressure block 1002 and the outer surface of the movable mold base 12 is 0, the piston rod 2 moves upward to drive the first wedge block 5 to move up to the third reversing groove C. Under the elastic force of the change-path spring 502, the first wedge block 5 returns to the first guide groove 801; the third wedge block 7 returns to its original position under the elastic force of the return spring 16 and moves to the first guide groove 801. The piston rod 2 moves downward to drive the first wedge block 5 to move downward. The inclined surface of the first wedge block 5 and the inclined surface of the second wedge block 6 squeeze each other, and the workpiece is clamped.

[0075] The above is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A synchronous transmission clamping device, characterized in that: It includes a mounting base, a movable mold base arranged on the mounting base, a fixed mold base, and a driving device for driving the movable mold base and the fixed mold base to close and open the mold; wherein, There are two groups of movable mold bases, which are respectively arranged on the upper and lower sides of the fixed mold base; The driving device includes two sets of pressure block chains and a force-increasing adjustment device, wherein: Two groups of pressure block chains are respectively arranged on the outer sides of the movable mold base; each group of pressure block chains includes multiple groups of pressure blocks, and adjacent groups of pressure blocks are rotatably connected by connecting shafts; wherein, the ends of the pressure blocks that contact the outer side surfaces of the movable mold base are provided with arcuate surfaces; the curvature of the arcuate surfaces is the same as the curvature of the outer side surfaces of the movable mold base; the connecting shaft includes a fixed connecting shaft and a movable connecting shaft; the two groups of pressure blocks located in the middle are rotatably connected by the fixed connecting shaft, and the fixed connecting shaft is fixed to the mounting base; the remaining two adjacent groups of pressure blocks are rotatably connected by the movable connecting shaft; The force-boosting adjustment device is used to drive the two sides of the upper and lower pressure block chains to close inward around the fixed connection axis in the pressure block chain, thereby applying pressure to the outer side surface of the movable mold base to promote the movable mold base and the fixed mold base to close the mold; or drive the two sides of the upper and lower pressure block chains to expand outward around the fixed connection axis in the pressure block chain, thereby releasing the pressure applied to the outer side surface of the movable mold base.

2. The synchronous transmission clamping device according to claim 1, characterized in that: There are four groups of pressure blocks, including two groups of first pressure blocks located in the middle position and two groups of second pressure blocks located on the outside, wherein the two groups of first pressure blocks are connected by a fixed connecting shaft; the first pressure blocks and the second pressure blocks are connected by a movable connecting shaft.

3. The synchronous transmission clamping device according to claim 2, characterized in that: The force-boosting adjustment device includes second wedge blocks arranged on both sides of the pressure block chain and a synchronous driving mechanism for driving the two groups of second wedge blocks to move toward or in opposite directions along the X-axis direction, wherein a second sliding groove is provided at the bottom of the mounting seat, and a second guide portion is provided at the bottom of the second wedge block, and the second guide portion is installed in the second sliding groove; a driving shaft is provided on the end of the second pressure blocks on both sides away from the movable connecting shaft; and vertically arranged driving grooves are provided on the two groups of second wedge blocks, and the driving shaft extends into the driving grooves of the corresponding second wedge blocks.

4. The synchronous transmission clamping device according to claim 3, characterized in that: The synchronous drive mechanism includes a pressure plate, a first wedge block arranged on both sides of the pressure plate, and a driving cylinder for driving the pressure plate to move downward along the Z-axis direction, wherein the driving cylinder is installed on the mounting seat, and the piston rod of the driving cylinder is connected to the pressure plate; the inclined surface of the first wedge block and the inclined surface of the second wedge block are tangent.

5. The synchronous transmission clamping device according to claim 4, characterized in that: The mounting seat is provided with a reset electromagnet on one side close to the second wedge block, and the second wedge block is made of magnetic material; when it is necessary to release the pressure applied by the pressure block chain to the movable mold base, the reset electromagnet drives the second wedge block to move in a direction away from the fixed mold base.

6. The synchronous transmission clamping device according to claim 5, characterized in that: The driving device also includes a pressure block gap adjustment device for adjusting the gap between the first pressure block or the second pressure block and the outer side surface of the movable mold base, and the pressure block gap adjustment device includes a third wedge block, a pressure block adjustment rod and a telescopic head arranged on the third wedge block, wherein the third wedge block is divided into two groups, and the two groups of third wedge blocks are respectively arranged on both sides of the pressure block chain; the mounting seat is provided with a third sliding groove at the bottom of the third wedge block, and the bottom of the third wedge block is provided with a third guide part, and the third guide part is installed in the third sliding groove; the third wedge block is provided with a mounting groove; the telescopic head is installed in the mounting groove; the pressure block adjustment rod is divided into two groups, and the other two groups of pressure block adjustment rods are respectively arranged on the third side of the pressure block chain. One end of the middle is hinged on a rotating shaft, and the rotating shaft is installed at one end of the telescopic head; wherein, the third wedge block is provided with a cylindrical block between the two groups of pressure block adjusting rods; a torsion spring is provided on the rotating shaft, and the elastic force of the torsion spring prompts the two groups of pressure block adjusting rods to be clamped on the upper and lower sides of the cylindrical block; the other end of the telescopic head extends out of the inclined surface of the third wedge block; wherein, a telescopic spring is provided between the telescopic head and the third wedge block, one end of the telescopic spring acts on the third wedge block, and the other end acts on the telescopic head; the elastic force of the telescopic spring prompts the telescopic head to extend out of the inclined surface of the third wedge block; the end of the telescopic head extending out of the inclined surface of the third wedge block is an arc-shaped portion.

7. The synchronous transmission clamping device according to claim 6, characterized in that: A position adjustment mechanism is further provided between the first wedge block and the pressure plate for driving the first wedge block to move along the X-axis direction to adjust the position of the first wedge block, wherein the first wedge block is slidably connected to the pressure plate; the position adjustment mechanism includes a track-changing electromagnet provided on the mounting seat, and the track-changing electromagnet is mounted on the mounting seat; the first wedge block is made of magnetic material; a lane-changing spring is provided between the first wedge block and the mounting seat, one end of the lane-changing spring acts on the pressure plate, and the other end acts on the first wedge block; the elastic force of the lane-changing spring causes the first wedge block to move The inclined surface is tangent to the inclined surface of the second wedge block; when it is necessary to adjust the gap between the second pressure block and the movable mold base, the track-changing electromagnet prompts the first wedge block to move along the X-axis direction to a position tangent to the inclined surface of the third wedge block, and moves tangentially to the inclined surface of the third wedge block under the drive of the driving cylinder; when it is necessary to adjust the gap between the first pressure block and the movable mold base, the track-changing electromagnet prompts the first wedge block to move along the X-axis direction to a position tangent to the arc-shaped portion of the telescopic head, and moves tangentially to the arc-shaped portion of the telescopic head under the drive of the driving cylinder.

8. The synchronous transmission clamping device according to claim 7, characterized in that: A return spring is provided between the third wedge block and the mounting seat, one end of the return spring acts on the mounting seat, and the other end acts on the third wedge block.

9. The synchronous transmission clamping device according to claim 6, characterized in that: The mounting seat is provided with a guide block on the outer side of the first wedge block, and the guide block is vertically provided with a first guide groove, a second guide groove and a third guide groove, the first guide groove and the second guide groove are connected through a first reversing groove; the second guide groove and the third guide groove are connected through a second reversing groove; the first guide groove, the second guide groove and the third guide groove are connected through the third reversing groove; the first wedge block is provided with a first guide part; the width of the first guide part is the same as the width of the first guide groove, the second guide groove and the third guide groove, and the length is the same as the width of the first reversing groove, the second reversing groove and the third reversing groove.

10. The synchronous transmission clamping device according to claim 1, characterized in that: There are two groups of driving devices, which are symmetrically arranged on the front and rear side surfaces of the mounting seat.

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