CN210849851U - Part hold-down mechanism and shot-blasting machine - Google Patents

Abstract

The utility model belongs to the technical field of shot blasting, and particularly provides a part pressing mechanism which is used for pressing a gear-shaped part to be processed and comprises a cylinder arranged outside a shot blasting chamber and a pressing tool arranged in the shot blasting chamber; the pressing tool comprises a guide rod and a pressing block, one end of the guide rod is connected with the air cylinder, and the other end of the guide rod is connected with the pressing block; the cylinder pushes or pulls the guide rod to drive the pressing block to press or loosen the part to be processed. The utility model discloses a part hold-down mechanism passes through the cylinder and drives the briquetting to the pressure that provides the invariant by the cylinder compresses tightly the pending part, has alleviateed operation workman's intensity of labour greatly.

Description

Part hold-down mechanism and shot-blasting machine

Technical Field

The utility model relates to a peening technical field especially relates to a part hold-down mechanism and shot-blasting machine.

Background

The gear is a part to be processed which is frequently encountered in shot blasting, and because shot blasting sprays out the shot materials through compressed air, the kinetic energy carried by the shot materials is larger. The gear is generally strung on a column in the shot-blasting chamber, as shown in fig. 1, when the shot 1 carrying larger energy is sprayed on the gear 2, the gear 2 will be caused to rotate randomly with small amplitude in the direction indicated by the arrow, so that the shot-blasting treatment is not uniform, the shot-blasting treatment is required for surface uniformity, and the mechanical strength of the part is affected by the non-uniform shot-blasting.

The current common treatment method is to install (i.e. fix) the gear (including other gear-shaped parts like the gear, such as a gear shaft and the like), then install a pressing block on the top of the gear, and press the gear through the self-weight or the thread engagement of the pressing block, so that the gear is not easy to slide or rotate relative to the installation platform. Because the dead weight of the briquetting is great, generally weighs 2kg at least, the workman is more laborious when the operation, also influences the installation speed. Therefore, there is a need for an automated pressing device to reduce the labor intensity and increase the installation speed.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a part hold-down mechanism, hold-down mechanism gives the pressure of comparison fixed through the cylinder, pressure transmits for the briquetting through the guide arm. Because the pressure is given through the cylinder, the briquetting just need not select for use great dead weight to lifting and putting down of briquetting all realize through the cylinder, need not artifical the removal, reduced operating personnel's intensity of labour.

The part pressing mechanism comprises an air cylinder arranged outside the shot blasting chamber and a pressing tool arranged in the shot blasting chamber; .

The pressing tool comprises a guide rod and a pressing block, one end of the guide rod is connected with the air cylinder, and the other end of the guide rod is connected with the pressing block;

the cylinder pushes or pulls the guide rod to drive the pressing block to press or loosen the part to be processed.

In the part pressing mechanism, the part pressing mechanism is only arranged at a shot blasting station in the shot blasting chamber.

In the part pressing mechanism, the air cylinder is fixedly connected with one end of the guide rod through an air cylinder fixing block, and the guide rod is driven to move through the air cylinder fixing block when the air cylinder moves; and an air cylinder limiting block for adjusting the stroke of the air cylinder is arranged below the air cylinder fixing block.

In the part pressing mechanism, the pressing block comprises multiple types and is detachably connected with the other end of the guide rod through threads.

In the above part pressing mechanism, the guide rod includes a primary guide rod and a secondary guide rod; one end of the primary guide rod is connected with the air cylinder, and the other end of the primary guide rod is connected with one end of the secondary guide rod; the other end of the secondary guide rod is detachably connected with the pressing block

In the part pressing mechanism, the secondary guide rod comprises an accommodating space and a pressing head; the pressing head is conical and is embedded in the accommodating space.

In the part pressing mechanism, the top of the accommodating space is fixed with a cushion pad, and when the part pressing mechanism is in a pressing state, the pressing head is abutted against the cushion pad and is relatively fixed.

In the part pressing mechanism, the accommodating space is provided with a falling stopping part, the secondary guide rod is provided with a boss, and the boss is clamped with the falling stopping part to prevent the secondary guide rod from falling out of the accommodating space.

The part pressing mechanism further comprises a sand baffle plate for blocking splashed shot materials, and the sand baffle plate is arranged around the second-stage guide rod and is fixed with the second-stage guide rod.

In the part pressing mechanism, a cover body is arranged outside the secondary guide rod, and a slope-shaped sand discharging plate is fixed at the bottom of the cover body; the sand blocking plate is in a hollow round table shape, the slope surface of the round table shape guides the shot materials to fall onto the sand discharging plate, and the sand discharging plate guides the shot materials to be discharged out of the cover body.

The part pressing mechanism further comprises a sensing device for sensing whether the guide rod rotates or not.

The utility model also provides a peening machine is equipped with at least one foretell part hold-down mechanism on the peening station.

Compared with the prior art, the utility model discloses a part hold-down mechanism passes through the cylinder and drives the briquetting to the pressure that provides the invariant by the cylinder compresses tightly the pending part, has alleviateed operation workman's intensity of labour greatly.

Further, the utility model discloses a cylinder stopper and the briquetting of changing the high difference can be coarse tune respectively and fine setting part hold-down mechanism's application scope to make adaptable different part size of peening machine, part build quantity, thereby reduced the complexity of debugging.

The shot blasting machine is provided with more than one part pressing mechanism on the shot blasting station, so that the number of parts to be processed at one time is increased, and the improvement of the overall processing efficiency is facilitated.

Drawings

FIG. 1 is a schematic view of the rotation of a part to be processed;

fig. 2 is a schematic diagram of an embodiment of the present invention;

FIG. 3 is an internal schematic view of the compaction tool of FIG. 2;

FIG. 4 is a detail view of the secondary guide portion of FIG. 3;

fig. 5 is a schematic view of an embodiment of an inductor device according to the present invention;

fig. 6 is a schematic view of an embodiment of a shot peening station of the present invention.

Detailed Description

In order to make the objects and features of the present invention more comprehensible, embodiments of the present invention are further described below with reference to the accompanying drawings, however, the present invention may be implemented in various forms, and should not be limited to the described embodiments. Moreover, without conflict, one of ordinary skill in the art will recognize that the embodiments and features of the embodiments in the present application are susceptible to combination or substitution with one another. The advantages and features of the present invention will become more apparent in conjunction with the following description. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.

FIG. 1 is a schematic view showing the principle of causing gear-like parts (e.g., gears, gear shafts) to rotate during the shot blasting process. Since the gear-like parts 2 generally have through holes, when shot peening is performed, it is common to arrange a plurality of parts in series on a single column through the through holes and then perform shot peening. It will be appreciated by those skilled in the art that the part 2 needs to follow the rotation of the turntable at the bottom so that the entire surface of the part 2 can be treated. However, since the pellets 1 are ejected with the compressed air, the kinetic energy carried by the pellets 1 pushes the part 2 to rotate relatively to the turntable with a high probability, and the part can rotate randomly with a small amplitude in the direction indicated by the black arrow in fig. 1. In shot peening, such rotation is undesirable. The excessive manpower that relies on of current solution, operation workman's intensity of labour is great, and work efficiency is lower, consequently the utility model provides a part hold-down mechanism to alleviate the intensity of human labor.

As shown in fig. 2, the utility model provides a part hold-down mechanism includes cylinder 3 and compresses tightly frock 4, and the dotted line in the figure is used for showing in the peening room and outside the peening room, and the part more than the dotted line is the outside sign of peening room, and the part below the dotted line is the indoor sign of peening. The cylinder 3 is arranged outside the top of the shot blasting chamber, so that the protection of the cylinder 3 can be omitted, and the debugging and maintenance of the cylinder 3 are facilitated. Compress tightly frock 4 and set up in the inboard at peening roof portion, compress tightly frock 4 and include a guide arm and briquetting 41, the one end and the cylinder 3 of guide arm are connected, and the other end is connected with briquetting 41. Specifically, the cylinder 3 with the one end of guide arm is all fixed on cylinder fixed block 6, when the cylinder 3 moved, drives the guide arm up-and-down motion to can realize compressing tightly or relax the function of pending part. In order to monitor whether the part to be processed rotates relative to the rotary table, a sensing device 7 is further arranged at one end of the guide rod, and when the guide rod is sensed to rotate relatively, an alarm is given to request manual intervention.

Further, an air cylinder limiting block 8 is further arranged below the air cylinder fixing block 6. Because the cylinder 3 in this embodiment is a fixed-stroke cylinder, the stop height of the pressing block 41 can be primarily adjusted by adjusting the height of the cylinder limiting block 8, and in combination with the fine adjustment of the pressing block 41, which will be described later, the part pressing mechanism in this embodiment can adapt to various parts to be processed, and the parts to be processed cannot be effectively pressed due to the excessively low or high stacking height of the parts to be processed.

Further, in order to protect the air pipe of the cylinder 3, other control signal lines (for example, control signal lines of a sensing means 7 which will be mentioned later), a tank chain 5 is also provided. Trachea, signal line etc. wrap up in tank chain 5, and in the reciprocating motion in-process of cylinder 3, tank chain 5 plays the protection trachea, signal line etc.'s effect prevents effectively that the pipeline from twining, even twists the condition such as disconnected. Preferably, the air pipe and the signal wire can be separated by a plastic partition plate.

As shown in fig. 3, the pressing tool 4 specifically includes: a pressure piece 41, a protective shell 42, a primary guide rod 43, a secondary guide rod 44, an organ pipe 45 and a cushion 46.

Because the reason in aspects such as material and manufacturing process, the machining precision requirement of slender pole is than higher, is difficult to reach comparatively ideal axiality, consequently, the guide arm adopt the mode manufacturing of multistage guide arm interconnection. In this embodiment, the guide rods are divided into a primary guide rod 43 and a secondary guide rod 44. The main body of the first-stage guide rod 43 is a slender straight rod, one end of the first-stage guide rod is connected with the cylinder fixing block 6 shown in fig. 1, and the other end of the first-stage guide rod is fixedly connected with the second-stage guide rod 44 through a method such as screws or welding. One end of the secondary guide rod 44 far away from the primary guide rod 43 is connected with the pressing block 41.

Further, the pressing block 41 may be designed in various sizes, i.e., different shapes and different heights. Different shapes can be adapted to the shapes of different parts to be processed; the different heights can play a role in finely adjusting the stopping height of the part pressing mechanism, and the part pressing mechanism can adapt to various parts to be processed by combining with the cylinder limiting block 8, so that the parts to be processed cannot be effectively pressed due to too low or too high stacking height of the parts to be processed. In addition, one end of the pressing block 41 connected to the secondary guide rod 44 (i.e., one end of a pressing head 441 described later) is provided with a screw thread, and is detachably connected to the secondary guide rod 44 through the screw thread.

Since the overall length of the primary guide rod 43 and the secondary guide rod 44 is still long, the transmission path of the whole pressing force is large in the number of parts involved, the distance is long, and the machining precision is also deviated, so that the ideal concentric state cannot be easily achieved after the parts (especially the parts participating in the rotary pressing) are combined. In such a case, the parts are easily broken when the rotation is performed, and therefore, as shown in the detail view of fig. 4, the secondary guide rod 44 is further designed to be movable and rotatable relative to each other in the present embodiment. One of the two parts is designed to be a thick and large bell mouth, and the bell mouth is deep, so that a receiving space is formed for receiving the pressing head 441 in the other part of the secondary guide rod 44. As shown in the figure, one end of the pressing head 441 is tapered, and the pressing head 441 is embedded in the accommodating space. In the process of pressing the part to be processed, the pressing head 441 has a certain movement allowance and can be inclined within a certain range, so that an included angle can be formed between the pressing head and the central shaft of the guide rod, the actual rotating shaft of the whole guide rod is corrected, and the defect that the coaxiality of the guide rod is not enough can be overcome. Further, if the hold down head 441 is not provided, it is necessary that the turntable (gear) in the peen chamber be concentric with both the primary guide rod 43 and the secondary guide rod 44, however, this is desirable, so the hold down head 441 is added to compensate for relative errors between all components.

In addition, in order to protect the primary guide rod 43 and the secondary guide rod 44 and reduce the abrasion caused by the shot pellets, an organ pipe 45 and a protective shell 42 are respectively arranged in the embodiment. The accordion pipe 45 is wrapped outside the main body portion of the primary guide rod 43 to protect the primary guide rod 43. The protective shell 42 is arranged outside the organ pipe 45, wraps most of the first-stage guide rod 43 and the second-stage guide rod 44, and only the part of the second-stage guide rod 44 connected with the pressing block is not protected.

Further, fig. 4 shows a detailed view of the inside of the nested portion of the primary guide rod 43 and the secondary guide rod 44 in fig. 3. The secondary guide rod 44 is also divided into two sections, wherein one end of the first section expands to form a containing space, and the second section of the pressing head 441 is provided with a main body part embedded in the containing space. The accommodating space is provided with a step-shaped falling stopping part 443, the outer surface of the pressing head 441 is provided with a boss 442, and the falling stopping part 443 and the boss 442 are clamped, so that the main body part of the pressing head 441 is wrapped in the accommodating space and does not fall off. When the part pressing mechanism is in a pressing state, the pressing head 441 and the top of the accommodating space are abutted against each other and cannot move relatively (i.e., are relatively fixed), so that the whole guide rod temporarily forms a rigid connection state, the pressure of the cylinder 3 can be transmitted to the part to be processed, and the effect of pressing the part to be processed is achieved. On the one hand, the laminating degree of briquetting 41 and pending part is better, and the mobilizable pressure head 441 of on the other hand has revised to a certain extent the not good defect of axiality that the guide arm probably exists. Specifically, the top wall of the accommodating space is provided with a cushion pad 46, in a compressed state, the compression head 441 and the cushion pad 46 are abutted against each other and cannot move relatively (i.e. are relatively fixed), the cushion pad 46 plays a role in relieving abrasion caused by hard contact between the compression head 441 and the top wall of the accommodating space, and the cushion pad made of rubber material also has a function of increasing friction between the cushion pad 46 and the top wall of the accommodating space. Currently, in a commercial embodiment, the cylinder type selected is MDB63-300Z, with a stroke of 300mm and a compressed air pressure of 7 bar.

Further, since the shot bounce trajectory in the shot chamber is random, some of the shot may fly from the lower gap of the hood 49 outside the secondary guide 44. In order to avoid the accumulation of the pellets in the cover body 49, as shown in fig. 4, a sand baffle plate 47 fixed on the pressing head 441 is further provided in this embodiment, the sand baffle plate 47 is in a hollow circular truncated cone shape, the pressing head 441 passes through the hollow portion, the bottom surface of the circular truncated cone shape can shield most of the flying-in pellets, and a small portion of the pellets splashed above the sand baffle plate 47 fall down and then slide along the slope surface of the circular truncated cone shape, so that no pellets are accumulated above the sand baffle plate 47. The falling pellets are guided by the sand discharging plate 48 to flow out of the cover body 49, so that no pellets are accumulated in the cover body 49. Specifically, the sand discharging plate 48 is a slope arranged at the bottom of the cover 49, and the slope guides the pellets to be discharged from the gap between the secondary guide rod 44 and the cover 49.

Further, as shown in fig. 2, 3 and 5, the part pressing mechanism further includes a sensing device 7 for sensing whether the guide bar rotates. The sensing device 7 in this embodiment comprises a rotary plate and proximity switch 72. The rotating piece and the guide rod are arranged concentrically, when the guide rod rotates, the rotating piece and the guide rod rotate synchronously, and the proximity switch 72 can sense the rotation of the rotating piece, so that whether the guide rod rotates or not can be monitored. As described in the foregoing, the present invention aims to prevent the guide rod from rotating relatively to the bottom of the turntable, if the guide rod is rotated, the pressing force is not enough, the pressing block needs to be readjusted, and the to-be-processed part can be rotated tightly along with the turntable without relative sliding or rotation. If the sensing device 7 senses that the guide rod rotates relatively, an alarm is given, and manual intervention is required.

Specifically, the rotating blade includes 4 blades 711, and a blade gap 712 is formed between every two blades 711. The proximity switch 72 is provided at one side of the rotary piece. Preferably, the proximity switch 72 is fixed to the cylinder fixing block 6, so that when the guide rod is raised or lowered, the proximity switch 72 is also raised or lowered (substantially raised or lowered with the rotary plate). Since the proximity switch is a component capable of sensing objects within a certain distance, as long as the distance between the rotary piece and the proximity switch 72 is reasonably set, the vane 711 can be sensed by the proximity switch 72, and the vane gap 712 (specifically, the bottom of the vane gap 712) cannot be sensed by the proximity switch 72, so that an alternate on-off signal can be formed, which can be used to indicate whether the rotary piece is in motion, and if the rotary piece is in motion (the proximity switch outputs the alternate on-off signal), an alarm is given to require the intervention of a worker.

As will be appreciated by those skilled in the art, shot blasting machines are generally divided into 2-4 stations, wherein shot blasting generally only occupies one station, and other stations, such as loading and unloading stations, do not need to compact the parts to be processed, so that the part compacting mechanism only needs to be arranged at the shot blasting station.

FIG. 6 shows a shot-peening station of a shot-peening machine, wherein 4 dashed boxes are used to illustrate the parts to be treated. In order to improve the efficiency of the shot blasting treatment, 4 sets of part pressing mechanisms are arranged in one shot blasting station in the embodiment, and for the sake of clarity, the figure comprises a shot blasting chamber and a shot blasting chamber. The part outside the peen chamber comprises 4 cylinders 3, the part inside the peen chamber comprises 4 compacting devices 4, and 4 sets of part compacting mechanisms are all in a loosening state, so that the organ pipes 45 in the compacting devices 4 are partially outside the peen chamber. The shot-blasting chamber also comprises four spray guns 9, and one spray gun 9 treats a group of parts to be treated. When the part pressing mechanism is in a pressing state, each group of parts to be processed rotates along with the bottom rotary table to receive shot blasting processing of the spray gun 9.

The part pressing mechanism adopts the air cylinder to provide pressure to press the part to be processed, so that on one hand, the robot can be used for loading and unloading, the industrial automation is realized, and the labor force is liberated; on the other hand, the efficiency and the effect of compressing parts are improved, and further the labor productivity is greatly improved.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (12)

1. A part pressing mechanism is characterized by being used for pressing a gear-shaped part to be processed and comprising a cylinder arranged outside a shot blasting chamber and a pressing tool arranged inside the shot blasting chamber;

the pressing tool comprises a guide rod and a pressing block, one end of the guide rod is connected with the air cylinder, and the other end of the guide rod is connected with the pressing block;

the cylinder pushes or pulls the guide rod to drive the pressing block to press or loosen the part to be processed.

2. The part holding-down mechanism as claimed in claim 1, wherein the part holding-down mechanism is provided only at a shot-blasting station in the shot-blasting chamber.

3. The part pressing mechanism according to claim 1, wherein the cylinder is fixedly connected with one end of the guide rod through a cylinder fixing block, and the guide rod is driven to move by the cylinder fixing block when the cylinder moves; and an air cylinder limiting block for adjusting the stroke of the air cylinder is arranged below the air cylinder fixing block.

4. The parts press mechanism as claimed in claim 1, wherein said press block includes a plurality of types, and is detachably connected to the other end of said guide rod by means of a screw.

5. The parts press mechanism as claimed in any one of claims 1 to 4, wherein the guide bar comprises a primary guide bar and a secondary guide bar; one end of the primary guide rod is connected with the air cylinder, and the other end of the primary guide rod is connected with one end of the secondary guide rod; the other end of the secondary guide rod is detachably connected with the pressing block.

6. The part hold-down mechanism of claim 5, wherein said secondary guide comprises a receiving space and a hold-down head; the pressing head is conical and is embedded in the accommodating space.

7. The parts holding-down mechanism of claim 6, wherein a cushion pad is fixed on the top of the accommodating space, and when the parts holding-down mechanism is in a holding-down state, the holding-down head is abutted against the cushion pad and is fixed relatively.

8. The part hold-down mechanism of claim 6, wherein the receiving space has a stop portion, and the secondary guide bar has a projection, the projection engaging with the stop portion to prevent the secondary guide bar from falling out of the receiving space.

9. The parts press mechanism as claimed in claim 6, further comprising a sand guard for blocking splashed pellets, said sand guard being disposed around and secured to said secondary guide bar.

10. The part hold-down mechanism of claim 9, wherein a cover is provided outside the secondary guide rod, and a slope-shaped sand-discharging plate is fixed at the bottom of the cover; the sand blocking plate is in a hollow round table shape, the slope surface of the round table shape guides the shot materials to fall onto the sand discharging plate, and the sand discharging plate guides the shot materials to be discharged out of the cover body.

11. The parts press mechanism as claimed in any one of claims 1 to 4 and 6 to 10, further comprising a sensing means for sensing whether said guide bar is rotated.

12. A shot-blasting machine, characterized in that at least one part-holding-down device according to any one of claims 1 to 10 is provided at a shot-blasting station.

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