CN110884184A - Crank press - Google Patents

Abstract

The invention relates to the technical field of automobile part processing, and discloses a crank press which comprises a bed body, a crankshaft rotationally connected to the bed body, a power mechanism used for driving the crankshaft to rotate, a sliding block arranged on the bed body in a sliding mode, and a connecting rod, wherein one end of the connecting rod is hinged with the crankshaft, and the other end of the connecting rod is hinged with the sliding block. The invention has the following advantages and effects: when workpieces such as automobile parts are machined, the power mechanism drives the crankshaft to rotate, and the crankshaft drives the sliding block to reciprocate through the connecting rod, so that the workpieces are punched. Set up the location bracket in the slider below, reciprocal linear motion is also done to the location bracket, avoids the slider actual motion stroke to be greater than and sets for the stroke, makes the slider motion steady, and the punching press adds the precision height in man-hour, and the workman can observe guide pillar and location bracket visually simultaneously, judges whether deviation appears in slider stroke and motion state, can effectively improve the punching press and add the yields in man-hour.

Description

a crank press

technical field

The invention relates to the technical field of automobile parts processing, in particular to a crank press.

Background technique

As the foundation of the auto industry, auto parts are a necessary factor to support the sustainable and healthy development of the auto industry. Stamping is one of the common processes in the processing of auto parts. Presses and molds apply external force to the material to cause plastic deformation or separation, so as to obtain workpieces of the desired shape and size. Crank presses are cold stamping equipment and use crank connecting rods as working mechanisms. In the process of processing auto parts, the crank press is prone to aging after long-term use, especially when the slider and bed are worn, and the crankshaft and connecting rod are worn, which will cause inaccurate stamping strokes of the slider, which is very likely to cause car zero. The problem of poor quality of parts after stamping.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a crank press, which has the effect of improving the precision of the punching stroke.

The above technical purpose of the present invention is achieved through the following technical solutions: a crank press comprising a bed body, a crankshaft rotatably connected to the bed body, a power mechanism for driving the rotation of the crankshaft, and a sliding arrangement on the bed A sliding block of the body, a connecting rod whose one end is hinged with the crankshaft and the other end is hinged with the sliding block, the bed body is provided with a lead screw rotatably arranged on the bed body, and is installed on the bed body for driving the thread A servo motor and a reducer that rotate with a screw, the lead screw is sleeved with a nut assembly, the slider is provided with a guide hole, the nut assembly is provided with a guide post passing through the guide hole, and the guide post is fixed with a A positioning bracket located under the slider.

By adopting the above technical solution, when the crank press is working, the power mechanism drives the crankshaft to rotate, the crankshaft drives the slider to reciprocate through the connecting rod, the output shaft of the servo motor is connected with the input shaft of the reducer, and the output shaft of the reducer is connected with the lead screw Connected, the servo motor and the reducer drive the lead screw to rotate, the lead screw drives the nut assembly to move, and then drives the guide post and the positioning bracket to move, and the positioning bracket moves back and forth with the slider. When the locating bracket is in contact with and hold the slider to prevent the slider from continuing to slide down, so as to improve the accuracy of the stamping stroke, the slider moves smoothly and the machining accuracy is high during the processing of auto parts.

The present invention is further provided as follows: the bed body is fixed with a guide rail, and the side wall of the nut assembly is slidably connected in the guide rail.

The present invention is further provided as follows: the side wall of the guide column is provided with a receiving groove, and the receiving groove is used for the guide rail to be placed.

The present invention is further provided as follows: a positioning ring is fixed on the inner wall of the guide hole, and a coating layer is provided on the outer wall of the guide post.

By adopting the above technical solution, when the side wall of the slider and the bed are worn, after the slider is deflected in the horizontal direction, during the movement of the slider, the positioning ring at the guide hole contacts the outer wall of the guide column and scrapes it off. As soon as the coating on the outer wall of the guide post is scraped off, the worker can judge the deflection of the slider when it moves.

The present invention is further provided as follows: an upper mold is fixed on the sliding block, a worktable is fixed on the bed, a mold base is hingedly connected to the worktable, and a lower mold is fixed on the mold base.

By adopting the above technical solution, the workpiece to be processed is placed on the lower die, and the slider and the upper die move downward to process the workpiece.

The present invention is further provided as follows: the mold base is hinged with a hook part 1, the mold base is provided with an elastic element for driving the hook part 1 to abut on the mold base, and the guide post is provided with a hook part Second, when the guide post moves downward, the hook part 2 slides over the hook part 1; when the guide post moves upward, the hook part 2 hooks the hook part 1 and drives the die base to turn over .

By adopting the above technical solution, when the slider and the lower die move downward, the workpiece is punched, the guide post moves downward, and the second hook slides over the first hook. When the slider and the upper die move upward, the hook part 2 on the guide post hooks the hook part 1 on the die base, which drives the die base and the lower die to turn over, the workpiece on the lower die is separated from the lower die, and the automatic unloading is completed. Avoid manual unloading by workers and improve the safety of crank presses. After the hook part 2 of the guide post is separated from the hook part 1 of the die base, the die base is reset under the action of gravity.

The present invention is further provided as follows: the worktable is hinged with a swing arm, one end of the swing arm is fixed with a buffer spring, the worktable is provided with a through hole, and the worktable is provided with a positioning component; After the seat is turned over to contact and push the swing arm to turn over, the buffer spring passes through the through hole and is positioned under the die seat, and the positioning component fixes the position of the swing arm.

By adopting the above technical solution, the die base contacts and pushes the swing arm to turn over after turning over, the buffer spring of the swing arm passes through the through hole and is located under the die base, and when the die base is reset under its own gravity, it contacts the buffer spring to avoid the die base It hits the workbench directly to create a screeching noise.

The present invention is further provided as follows: the worktable is provided with installation holes distributed on one side of the swing arm, the positioning assembly includes a positioning block inserted into the installation hole, and one end is fixed on the inner wall of the installation hole The other end is fixed to the positioning spring of the positioning block, the positioning block is provided with a guide surface, and when the swing arm is turned over, the guide surface is forced to drive the positioning block to move toward the installation hole.

By adopting the above technical solution, when the swing arm is turned over after being pushed by the die base, and the guide surface on the positioning block is in contact with the swing arm, the guiding and positioning block is away from the swing arm, and when the swing arm moves through the positioning block, the positioning spring drives the positioning After the block moves, the positioning block blocks the swing arm from returning to achieve the function of positioning the swing arm.

The present invention is further provided as follows: the upper end surface of the positioning bracket is provided with a second coating layer.

By adopting the above technical solution, when the actual movement stroke of the slider is greater than the preset stroke, when the slider moves to the lowest end, it hits the positioning bracket, and the worker can judge the slider after visually observing the wear of the second coating. The actual motion stroke exceeds the set stroke.

The present invention further provides that: the power mechanism includes an electric motor.

The beneficial effects of the present invention are: when processing workpieces such as auto parts, the power mechanism drives the crankshaft to rotate, and the crankshaft drives the slider to reciprocate through the connecting rod to complete the stamping of the workpiece. A positioning bracket is set under the slider, and the positioning bracket also performs reciprocating linear motion to prevent the actual movement stroke of the slider from being greater than the set stroke, so that the slider moves smoothly, and the precision is high during stamping processing. At the same time, workers can visually observe the guide post and Positioning the bracket, judging whether there is a deviation in the stroke and motion state of the slider, can effectively improve the yield during stamping processing.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Figure 1 is a schematic structural diagram of the present invention.

2 is a schematic diagram of the connection relationship between the lead screw, the nut assembly, the guide post and the slider of the present invention.

Fig. 3 is the first state schematic diagram of the swing arm and the die base of the present invention.

Fig. 4 is the second state schematic diagram of the swing arm and the die base of the present invention.

5 is a schematic diagram of the positional relationship between the swing arm and the worktable of the present invention.

FIG. 6 is an enlarged view of part A of FIG. 5 .

FIG. 7 is a schematic structural diagram of the positioning assembly of the present invention.

In the figure, 1, bed body; 11, power mechanism; 12, crankshaft; 13, connecting rod; 14, guide rail; 2, slider; 21, guide hole; 3, lead screw; 31, nut assembly; 32, guide post ;321, hook part two; 33, positioning bracket; 4, workbench; 41, table body; 42, positioning seat; 421, mounting hole; 43, through hole; 44, notch; 5, servo motor; 51, Reducer; 6, positioning assembly; 61, positioning block; 611, guide surface; 612, positioning spring; 7, swing arm; 71, buffer spring; 8, die base; 81, lower die; 82, hook part one; 83 , elastic elements.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Embodiment: A crank press, as shown in FIG. 1 , includes a bed 1 , a crankshaft 12 rotatably connected to the bed 1 , a power mechanism 11 for driving the crankshaft 12 to rotate, and a slider slidably arranged on the bed 1 2. One end of the connecting rod 13 is hinged with the crankshaft 12 and the other end is hinged with the slider 2. The power mechanism 11 is an electric motor. An upper die is installed on the slider 2 , a worktable 4 is fixed on the bed body 1 , a die base 8 is hinged on the workbench 4 , and a lower die 81 is installed on the die base 8 . When the crank press is working, place the workpiece at the lower die 81, the power mechanism 11 drives the crankshaft 12 to rotate, and the crankshaft 12 drives the slider 2 to reciprocate through the connecting rod 13. When the slider 2 moves downward, the The upper die contacts and punches the workpiece to complete the punching process of the workpiece.

As shown in Figures 1 and 2, the bed body 1 is installed with a lead screw 3 rotatably connected to the bed body 1, a servo motor 5 and a reducer 51 mounted and fixed on the bed body 1, the output shaft of the servo motor 5 and the reducer 51 The input shaft is connected, and the output shaft of the reducer 51 is connected with the lead screw 3 . A nut assembly 31 is sleeved on the lead screw 3, a guide rail is fixed on the bed body 1, and the nut assembly 31 is embedded in the guide rail. The slider 2 is provided with a guide hole 21 , a guide post 32 is fixed on the outer wall of the nut assembly 31 , and the guide post 32 passes downward through the guide hole 21 . A positioning bracket 33 is fixed on the guide post 32 , and the positioning bracket 33 is located below the sliding block 2 . The inner wall of the guide hole 21 is fixed with a positioning ring, the outer wall of the guide post 32 is provided with a coating layer 1, and the upper end surface of the positioning bracket 33 is provided with a coating layer 2.

As shown in FIG. 2 and FIG. 3 , a second hook 321 is fixed on the guide post 32, a hook one 82 is hinged on the die base 8, and an elastic element 83 is also fixed on the die base 8. The elastic element 83 is a spring, and the elastic element One end of 83 is fixed to the mold base 8 and the other end is fixed to the hook part 1 82 . The mold base 8 includes a blocking part located above the hook part 1 82 , and the elastic element 83 elastically drives the hook part 2 321 against the blocking part. When the nut assembly 31 moves downward, the guide post 32 is driven to descend, and the second hook portion 321 slides over the first hook portion 82 and is located below the first hook portion 82 . When the nut assembly 31 moves upward, it drives the guide post 32 to rise, the hook part 2 321 hooks the hook part 1 82 during the rising process, and drives the die base 8 to turn over, and the processed workpiece slides off the lower die 81 to realize automatic unloading. After the hook part 2 321 is disengaged from the hook part 1 82 , the mold base 8 moves downward under the action of its own gravity to reset.

As shown in FIGS. 3 and 4 , a swing arm 7 is also hinged in the worktable 4 , and the worktable 4 is provided with a through hole 43 and a slot 44 . One end of the swing arm 7 is fixed with a buffer spring 71 , and the other end is positioned above the workbench 4 after passing through the slot 44 . As shown in FIG. 3 to FIG. 7 , the workbench 4 is also provided with a positioning assembly 6 . The workbench 4 includes a table body 41 and two positioning seats 42 fixed on the table body 41 , and the two positioning seats 42 are distributed on the swing arm. 7 On both sides, one of the side walls of the positioning seat 42 is provided with a mounting hole 421. The positioning assembly 6 includes a positioning block 61 inserted into the mounting hole 421, one end is fixed to the positioning block 61 and the other end is fixed to the inner wall of the mounting hole 421. The spring 612 and the positioning block 61 are provided with a guide surface 611 . When the die base 8 is turned upward, the die base 8 contacts and pushes the swing arm 7 to turn over, the swing arm 7 contacts the guide surface 611 of the positioning block 61 and pushes the positioning block 61 to move toward the mounting hole 421 . When the swing arm 7 slides over the positioning block 61, the positioning block 61 moves and resets under the elastic force of the positioning spring 612. One side wall of the swing arm 7 abuts against the inner wall of the slot 44, and the other side wall is blocked by the positioning block 61. , at this time, the position of the swing arm 7 is fixed, and the buffer spring 71 on the swing arm 7 passes through the through hole 43 of the workbench 4 and is located under the die base 8. The die base 8 moves downward under the action of its own gravity during the reset process. The buffer spring 71 is in contact to avoid direct impact on the workbench 4 to generate a large noise.

When the crank press works: the power mechanism 11 drives the crankshaft 12 to rotate, the crankshaft 12 drives the slider 2 to reciprocate through the connecting rod 13, the output shaft of the servo motor 5 is connected to the input shaft of the reducer 51, and the output shaft of the reducer 51 is connected to the input shaft of the reducer 51. The lead screw 3 is connected, the servo motor 5 and the reducer 51 drive the lead screw 3 to rotate, the lead screw 3 drives the nut assembly 31 to move, and then drives the guide post 32 and the positioning bracket 33 to move, and the positioning bracket 33 reciprocates with the slider 2 When the slider 2 moves downward to break through the set stroke, the positioning bracket 33 contacts and supports the slider 2 to prevent the slider 2 from continuing to slide downward, so as to improve the accuracy of the stamping stroke. When machining auto parts The slider 2 moves smoothly and has high machining accuracy.

Claims (9)

1. A crank press, characterized in that it comprises a bed (1), a crankshaft (12) rotatably connected to the bed (1), a power mechanism (11) for driving the crankshaft (12) to rotate, A slider (2) slidably arranged on the bed body (1), a connecting rod (13) hinged with the crankshaft (12) at one end and hinged with the slider (2) at the other end, the bed The body (1) is provided with a rotatable lead screw (3), a servo motor (5) and a reducer (51) installed on the bed body (1) for driving the lead screw (3) to rotate. The lead screw (3) is sleeved with a nut assembly (31), the slider (2) is provided with a guide hole (21), and the nut assembly (31) is provided with a guide post passing through the guide hole (21). (32), the guide post (32) is fixed with a positioning bracket (33) located under the slider (2). 2 . The crank press according to claim 1 , wherein a guide rail is fixed on the bed body ( 1 ), and the side wall of the nut assembly ( 31 ) is slidably connected in the guide rail ( 14 ). 3 . 3 . The crank press according to claim 1 , wherein a positioning ring is fixed on the inner wall of the guide hole ( 21 ), and a coating layer is provided on the outer wall of the guide post ( 32 ). 4 . 4. A crank press according to claim 1, characterized in that: an upper die is fixed on the slider (2), a worktable (4) is fixed on the bed body (1), and the working A die base (8) is hingedly connected to the table (4), and a lower die (81) is fixed on the die base (8). 5. A crank press according to claim 4, characterized in that: the die base (8) is hinged with a hook portion one (82), and the die base (8) is provided with a hook for driving the hook The first part (82) is against the elastic element (83) on the die base (8). The guide post (32) is provided with a hook part two (321). When the guide post (32) moves downwards The second hook portion (321) slides over the first hook portion (82), and when the guide post (32) moves upward, the second hook portion (321) hooks the first hook portion (82) and drives the The mold base (8) is turned over. 6 . The crank press according to claim 5 , wherein a swing arm ( 7 ) is hinged to the worktable ( 4 ), and a buffer spring ( 71 ) is fixed at one end of the swing arm ( 7 ). 7 . , the worktable (4) is provided with a through hole (43), and the worktable (4) is provided with a positioning assembly (6); when the mold base (8) is turned over, it contacts and pushes the swing arm (7) After being turned over, the buffer spring (71) passes through the through hole (43) and is positioned below the die base (8), and the positioning assembly (6) fixes the position of the swing arm (7). 7. A crank press according to claim 6, characterized in that: the worktable (4) is provided with mounting holes (421) distributed on one side of the swing arm (7), and the positioning assembly (6) comprising a positioning block (61) inserted into the mounting hole (421), a positioning spring (612) one end fixed to the inner wall of the mounting hole (421) and the other end fixed to the positioning block (61) ), the positioning block (61) is provided with a guide surface (611), and when the swing arm (7) is turned over, the guide surface (611) is forced to drive the positioning block (61) toward the installation hole ( 421) internal movement. 8 . The crank press according to claim 1 , wherein the upper end surface of the positioning bracket ( 33 ) is provided with a second coating layer. 9 . 9. A crank press according to claim 1, characterized in that: the power mechanism (11) comprises an electric motor.

Images