CN211360273U

CN211360273U - Punching and trimming single-die for brake wheel of brake disc of washing machine

Info

Publication number: CN211360273U
Application number: CN201921940047.0U
Authority: CN
Inventors: 韩华
Original assignee: Hangzhou Huahua Industry Co ltd
Current assignee: Hangzhou Huahua Industry Co ltd
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2020-08-28
Anticipated expiration: 2029-11-12

Abstract

The utility model relates to a single punching die for punching and trimming brake wheel of washing machine brake disc, which comprises a frame, a lower die fixed on the frame, and an upper die which is arranged on the upper part of the frame and can lift relative to the lower die, wherein the lower die comprises a lower die holder with a molding die cavity and a pre-clamping lower die arranged in the lower die holder, the upper die comprises an upper punch and an upper die core rod positioned at the axle center of the upper punch; a small die cavity is arranged at the axle center of the pre-clamping lower die, and a jacking mechanism for jacking the pre-clamping lower die is arranged in the lower die seat. The upper die base is internally provided with a pre-clamping lower die which can be jacked by a jacking mechanism, the pre-clamping lower die synchronously descends along with the descending of an upper die, the pre-clamping lower die and the upper die clamp a primary blank all the time in the descending process, the pre-clamping lower die descends to the bottom after the large-diameter part is formed, an upper die core rod and a small die cavity are matched to form a small-diameter part of the brake wheel, the brake wheel is formed by two-step punch forming, the product quality is stable, and the center of gravity of the brake wheel can be ensured at the rotating axis of the brake wheel through the.

Description

Punching and trimming single-die for brake wheel of brake disc of washing machine

Technical Field

The utility model relates to a mould, especially a washing machine brake disc braked wheel side cut single die that punches a hole.

Background

The washing machine is a necessity in life of people, and the washing machine greatly saves time of people.

With the development of technology, washing machines are developed into full-automatic washing machines, and a clutch is one of important parts of the full-automatic washing machines, and the automatic operation of the full-automatic washing machines is realized through the clutch. The clutch also has an important function of braking the washing machine, and an important part required for braking is a brake wheel arranged in the clutch.

At present, the brake wheel is usually machined, the machining time is long, the material utilization rate is low, the machining precision control difficulty is high, the quality of a braking surface is not stable, and the gravity center of the brake wheel is easy to deviate from the rotating axis of the brake wheel.

Disclosure of Invention

The utility model provides a current braked wheel adopt the mode of machining, material utilization is low, the defect that the braked wheel quality control degree of difficulty is big provides a washing machine brake disc braked wheel side cut single die that punches a hole, realizes the braked wheel shaping through the mode of punching press, and braked wheel product quality is stable to improve production efficiency, the focus of stamping forming assurance braked wheel is in the rotation axis department of braked wheel moreover.

The utility model discloses a concrete technical scheme does: a punching and trimming single-punch die for a brake wheel of a brake disc of a washing machine comprises a rack, a lower die fixed on the rack and an upper die arranged at the upper part of the rack and capable of lifting relative to the lower die, wherein the lower die comprises a lower die seat with a molding die cavity and a pre-clamping lower die arranged in the lower die seat, and the upper die comprises an upper punch and an upper die core rod positioned at the axle center of the upper punch; a small die cavity is arranged at the axle center of the pre-clamping lower die, and a jacking mechanism for jacking the pre-clamping lower die is arranged in the lower die seat.

The lower die base is provided with a forming die cavity, the shape of the forming die cavity is matched with the shape of a large-diameter part of the brake wheel, the upper punch moves downwards to be matched with the forming die cavity to punch a large-diameter part of the brake wheel, the shape of a small die cavity in the pre-clamping lower die is matched with the shape of a small-diameter part of the brake wheel, an upper die core rod moves downwards to be matched with the lower die cavity to punch a small-diameter part of the brake wheel, a pre-clamping lower die is arranged in the upper die base and is connected with a jacking mechanism and can be jacked by the jacking mechanism, after the pre-clamping lower die is jacked, the upper end of the pre-clamping lower die is flush with the upper surface of the forming die cavity of the lower die base, a blank is placed on the lower die base, the upper die and the pre-clamping lower die clamp the blank, the pre-clamping lower die synchronously move downwards along with the upper die, the upper punch, the pre-clamping lower die descends to the bottom, the upper die core rod and the small die cavity are matched to form a small-diameter part of the brake wheel, the brake wheel is formed in a two-step stamping mode, the product quality is stable, and the center of gravity of the brake wheel can be guaranteed at the rotating axis of the brake wheel through the pre-clamping lower die.

Preferably, the upper surface of the lower die base is provided with a sunken descending groove, the shape of the descending groove is matched with the shape of a plate blank punched by the brake wheel, the upper part of the molding die cavity is a guide bending part, the guide bending part is communicated with the bottom of the descending groove, and the guide bending part is in a horn shape. The primary blank of the brake wheel is a flat plate blank, the downward-placing groove is used for placing the plate blank, the plate blank is provided with a center hole, the downward-placing groove can be used for positioning the plate blank, and the centering performance is good.

More preferably, the lower portion of the molding cavity is a cylindrical molding portion, the cylindrical molding portion is in contact with the small-diameter opening of the lead bending portion, and the bottom of the molding cavity is a radial lower bottom surface.

Preferably, the axial center of the lower die holder is provided with an inner channel, and the upper end of the inner channel is communicated with the bottom of the molding die cavity; the pre-clamping lower die is arranged in the inner channel and can lift in the inner channel, and the jacking mechanism pushes the pre-clamping upper die to lift until the top of the pre-clamping upper die is flush with the upper surface of the lower die base.

Further preferably, jacking mechanism includes middle kicking block, the jacking jar that is connected with middle kicking block, and middle kicking block is in the inner passage of die holder, and the upper surface of middle kicking block is provided with the spring recess, is provided with in advance to press from both sides lower mould jacking spring in the spring recess, and the upper end that presss from both sides lower mould jacking spring in advance contacts with the lower surface that presss from both sides the lower mould in advance.

Further preferably, the inner wall of the inner channel is provided with a guide groove, the side edge of the bottom of the pre-clamping lower die is provided with a guide part which protrudes outwards in the radial direction, the guide part is embedded into the guide groove, and the upper end of the guide groove is closed to form a jacking limiting part of the pre-clamping upper die. The guide groove and the guide part are matched to guide the pre-clamping upper die to ascend and descend, so that the centering performance of the plate blank in the forming process can be guaranteed.

Preferably, the lower end of the upper punch is a punch part matched with the lower die base forming die cavity, the shaft center of the upper punch is provided with a through hole, an upper die core rod capable of lifting in the through hole is arranged in the through hole, and the lower end of the upper die core rod is a core rod head matched with a small die cavity pre-clamping the shaft center of the lower die.

Further preferably, the outer diameter of the mandrel head is smaller than the outer diameter of the upper mandrel, an outwardly-extending arc shoulder is formed at the upper end of the mandrel head, and the central angle of the arc shoulder is 90 °.

Preferably, the outer part of the upper punch is sleeved with an outer extrusion sleeve, the outer diameter of the outer extrusion sleeve is larger than that of the punch head part at the lower end of the upper punch, the upper end of the outer extrusion sleeve is connected with an extrusion driving mechanism, and the extrusion driving mechanism pushes the outer extrusion sleeve to descend relative to the upper punch; the lower end of the outer extrusion sleeve is provided with an annular outer extrusion head, and a containing cavity matched with the upper part of the punch head is arranged in the extrusion head. The inner wall of the opening of the large-diameter part of the brake wheel is provided with steps, and the steps can be completed in the stamping process through the outer extrusion sleeve.

Preferably, the extrusion driving mechanism comprises a turret which descends synchronously with the upper punch, the turret is annular, a supporting leg is fixed at the lower part of the turret, a rotating wheel is arranged at the end part of the supporting leg, a convex part protruding in an axial arc shape is arranged at the upper end of the outer extrusion sleeve, and the rotating wheel and the convex part are matched to push the outer extrusion sleeve to descend.

The utility model has the advantages that: the lower die base is provided with a forming die cavity, the shape of the forming die cavity is matched with the shape of a large-diameter part of the brake wheel, the upper punch moves downwards to be matched with the forming die cavity to punch a large-diameter part of the brake wheel, the shape of a small die cavity in the pre-clamping lower die is matched with the shape of a small-diameter part of the brake wheel, an upper die core rod moves downwards to be matched with the lower die cavity to punch a small-diameter part of the brake wheel, a pre-clamping lower die is arranged in the upper die base and is connected with a jacking mechanism and can be jacked by the jacking mechanism, after the pre-clamping lower die is jacked, the upper end of the pre-clamping lower die is flush with the upper surface of the forming die cavity of the lower die base, a blank is placed on the lower die base, the upper die and the pre-clamping lower die clamp the blank, the pre-clamping lower die synchronously move downwards along with the upper die, the upper punch, the pre-clamping lower die descends to the bottom, the upper die core rod and the small die cavity are matched to form a small-diameter part of the brake wheel, the brake wheel is formed in a two-step stamping mode, the product quality is stable, and the center of gravity of the brake wheel can be guaranteed at the rotating axis of the brake wheel through the pre-clamping lower die.

Drawings

FIG. 1 is a schematic view of a brake wheel structure of a brake disc of a washing machine;

FIG. 2 is a schematic structural view of the present invention;

fig. 3 is a schematic structural view of an upper mold of the present invention;

FIG. 4 is a schematic view of a lower mold structure of the present invention;

fig. 5 is a schematic structural view of an extrusion driving mechanism of the present invention;

in the figure: 1. the device comprises a brake wheel, 2, a guide post, 3, a ball sleeve, 4, a guide sleeve, 5, an upper seat plate, 6, a lower die sleeve, 7, a lower die seat, 8, an outer extrusion sleeve, 9, an upper punch, 10, an upper die core rod, 11, a pre-clamping lower die, 12, a stripping ejection sleeve, 13, a mounting seat, 14, a stripping spring, 15, a middle ejection block, 16, a pre-clamping lower die ejection spring, 17, an ejection cylinder, 18, a mounting table, 19, an outer extrusion head, 20, a containing cavity, 21, a punch head, 22, an arc shoulder, 23, a core rod head, 24, a lowering groove, 25, a guide bending part, 26, a lower bottom surface, 27, an exhaust hole, 28, a guide part, 29, a guide groove, 30, an inner channel, 31, a turret, 32, a support leg, 33, a rotating wheel, 34 and a convex.

Detailed Description

The invention will be further described with reference to specific embodiments and with reference to the accompanying drawings.

Example (b):

as shown in figure 1, the brake wheel 1 of the brake disc of the washing machine comprises a small-diameter part and a large-diameter part which are coaxially arranged, wherein the small-diameter part and the large-diameter part are both columnar, a radial annular surface is arranged between the small-diameter part and the large-diameter part, the thickness of the radial annular surface close to the small-diameter part is larger than that of the outside, a step is arranged on the inner wall of an opening of the large-diameter part, and the thickness of the step is smaller than that of the rest parts of the large.

As shown in figures 2, 3, 4 and 5, the single punching die for punching and trimming the brake wheel of the brake disc of the washing machine comprises a frame, a lower die fixed on the frame and an upper die arranged at the upper part of the frame and capable of lifting relative to the lower die.

The rack comprises a mounting table 18 and an upper seat plate 5, wherein a guide pillar 2 is fixed on the mounting table, a damping spring is sleeved on the guide pillar, a roller sleeve 3 is fixed at the upper end of the guide pillar, and a guide sleeve is fixed on the upper seat plate and matched with the roller sleeve. The mounting table is provided with a transversely extending inverted T-shaped groove, a mounting seat is fixed on the mounting table, a T-shaped bolt penetrates into the inverted T-shaped groove, and the mounting seat 13 is fixed on the mounting table through the T-shaped bolt. The lower die base is located in the middle of the mounting base and fixed with the mounting base.

The lower die comprises a lower die sleeve 6, a lower die base 7 which is embedded and fixed in the lower die sleeve and is provided with a forming die cavity, and a pre-clamping lower die 11 arranged in the lower die base, wherein a small die cavity is arranged at the axis of the pre-clamping lower die, and a jacking mechanism for jacking the pre-clamping lower die is arranged in the lower die base. The upper surface of the lower die holder is provided with a sunken descending groove 24, the shape of the descending groove is matched with the shape of a plate blank punched by the brake wheel, the upper part of the molding die cavity is provided with a guide bending part 25, the guide bending part is communicated with the bottom of the descending groove, and the guide bending part is in a horn shape. The lower part of the molding cavity is a cylindrical molding part which is connected with the small diameter opening of the lead bending part, and the bottom of the molding cavity is a radial lower bottom surface 26. An inner channel 30 is arranged at the axis position of the lower die base, the upper end of the inner channel is communicated with the bottom of the molding die cavity, a through hole coaxial with the inner channel is arranged at the bottom of the lower die sleeve, and a through hole coaxial with the inner channel is arranged at the base of the mounting base. The pre-clamping lower die is arranged in the inner channel and can lift in the inner channel, and the jacking mechanism pushes the pre-clamping upper die to lift until the top of the pre-clamping upper die is flush with the upper surface of the lower die base. The inner channel inner wall is provided with a guide groove, the side edge of the bottom of the pre-clamping lower die is provided with a guide part which protrudes radially outwards, the guide part is embedded into the guide groove, and the upper end of the guide groove is closed to form a pre-clamping upper die jacking limiting part. The jacking mechanism comprises a middle jacking block 15 and a jacking cylinder 17 connected with the middle jacking block, the middle jacking block is positioned in an inner channel of the lower die base, a spring groove is formed in the upper surface of the middle jacking block, a pre-clamping lower die jacking spring 18 is arranged in the spring groove, and the upper end of the pre-clamping lower die jacking spring is in contact with the lower surface of the pre-clamping lower die. The small die cavity is arranged at the upper end of the pre-clamping lower die, the demoulding top sleeve 12 is arranged in the small die cavity, and the bottom of the demoulding top sleeve is provided with an axial exhaust hole 27. And a demoulding spring 14 is arranged in the lower mould cavity, the lower end of the demoulding spring is contacted with the bottom of the small mould cavity, and the upper end of the demoulding spring is contacted with the lower surface of the bottom of the demoulding top sleeve. The inner wall of the small die cavity is provided with an axial guide groove 29, the outer side of the bottom of the demoulding top sleeve is provided with a guide part 28 which protrudes outwards in the radial direction, the guide part is matched with the guide groove, the top of the guide groove is embedded into a limiting block and seals the upper end of the guide groove, and the limiting block forms a rising limiting part of the demoulding top sleeve.

The upper die comprises an upper punch 9, an outer extrusion sleeve 8 and an upper die core rod 10 which are matched with the forming die cavity of the lower die holder, the upper punch is provided with a through hole in the axial direction, the upper die core rod is arranged in the through hole and can lift in the through hole, and the outer extrusion sleeve is arranged outside the upper punch. The lower extreme of last drift is drift 21, and the external diameter of drift is greater than the rest positions external diameter of drift, and the external diameter of drift and the internal diameter looks adaptation of the big footpath position of braked wheel, the bottom periphery of drift is provided with the fillet. The outer extrusion sleeve is sleeved on the part with the small outer diameter of the upper punch, the lower end of the outer extrusion sleeve is an outer extrusion head 19, a containing cavity 20 is arranged in the outer extrusion head, the diameter of the containing cavity is matched with the outer diameter of the punch part, the outer diameter of the outer extrusion head is larger than the outer diameter of the punch part, the outer diameter of the outer extrusion head is matched with the diameter of a step of the inner wall of the opening of the large-diameter part of the brake wheel, and the end part of the outer extrusion head is a conical surface. The middle part of the upper punch is provided with an axial guide groove, the outer extrusion sleeve is radially embedded into a guide block, and the guide block is matched with the guide groove to realize axial guide of the outer extrusion sleeve. A reset spring is arranged in the guide groove, the lower end of the reset spring is in contact with the lower end of the guide groove, and the upper end of the reset spring is in contact with the lower surface of the guide block. The lower end of the upper mold core rod is provided with a core rod head 23 matched with the small mold cavity of the pre-clamping lower mold axis, the outer diameter of the core rod head is smaller than that of the upper mold core rod, an outward-extending arc shoulder 22 is formed at the upper end of the core rod head, and the central angle of the arc shoulder is 90 degrees. The outer diameter of the mandrel head is matched with the inner diameter of the small-diameter part of the brake wheel, and the mandrel head and the arc shoulder are used for forming the small-diameter part of the brake wheel. The upper end of the outer extrusion sleeve is connected with an extrusion driving mechanism, and the extrusion driving mechanism pushes the outer extrusion sleeve to descend relative to the upper punch. The extrusion driving mechanism comprises a rotary tower 31 which descends synchronously with the upper punch, the rotary tower is annular, a supporting leg 32 is fixed at the lower part of the rotary tower, a rotating wheel 33 is arranged at the end part of the supporting leg, a convex part 34 protruding in an axial arc shape is arranged at the upper end of the outer extrusion sleeve, and the rotating wheel and the convex part are matched to push the outer extrusion sleeve to descend. The side surface of the turret is hinged with a push cylinder, the turret is pushed to rotate through the stretching of the push cylinder, in the rotating process of the turret, the rotating wheel is matched with the convex part to further push the outer extrusion sleeve to move downwards, and after the rotating wheel of the turret leaves the convex part, the outer extrusion sleeve rises and resets under the action of the reset spring.

The plate blank is placed in a downward-placing groove of a lower die base, the pre-clamping lower die is jacked up under the action of a jacking cylinder, the top surface of the pre-clamping lower die is contacted with the lower surface of the plate blank, the upper die descends, the lower bottom surface of the upper punch and the pre-clamping upper die clamp the plate blank under the action of a jacking spring of the pre-clamping lower die, the plate blank is gradually bent along a guide bending part along with the continuous descending of the upper die, the upper punch and the lower bottom surface of a forming die cavity are clamped mutually to finish the forming of a large-diameter part of a brake wheel, then an upper die core rod descends, and the core rod head pushes the. Then the extrusion driving mechanism acts to push the turret to rotate, the rotating wheel walks along the upper surface of the convex part and pushes the outer extrusion sleeve to descend, the outer extrusion sleeve realizes axial movement under the matching of the guide block and the guide groove, and the outer extrusion head gradually expands and brakes the inner diameter of the opening of the large-diameter part. After the forming is finished, the upper die is reset, and the jacking cylinder jacks up and realizes the demoulding.

The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and equivalent transformation of doing above embodiment the utility model discloses technical scheme's protection scope.

Claims

1. The single punching die for punching and trimming the brake wheel of the brake disc of the washing machine is characterized by comprising a rack, a lower die fixed on the rack and an upper die arranged at the upper part of the rack and capable of lifting relative to the lower die, wherein the lower die comprises a lower die seat (7) with a molding die cavity and a pre-clamping lower die (11) arranged in the lower die seat, and the upper die comprises an upper punch (9) and an upper die core rod (10) positioned at the axle center of the upper punch; a small die cavity is arranged at the axle center of the pre-clamping lower die, and a jacking mechanism for jacking the pre-clamping lower die is arranged in the lower die seat.

2. The single punching die for punching and trimming the brake wheel of the brake disc of the washing machine according to claim 1, wherein a sunken descending groove (24) is formed in the upper surface of the lower die holder, the shape of the descending groove is matched with that of a plate blank punched by the brake wheel, the upper part of a forming die cavity is provided with a guide bending part (25), the guide bending part is communicated with the bottom of the descending groove, and the guide bending part is in a horn shape.

3. The single punch and trimming die for brake disc brake wheel of washing machine as claimed in claim 2, wherein the lower part of the molding cavity is a cylindrical molding part connected to the small diameter opening of the wire bending part, and the bottom of the molding cavity is a radial lower bottom surface (26).

4. The single punching die for punching and trimming the brake disc brake wheel of the washing machine as claimed in claim 1, 2 or 3, wherein an inner channel (30) is arranged at the axial center part of the lower die holder, and the upper end of the inner channel is communicated with the bottom of the molding die cavity; the pre-clamping lower die is arranged in the inner channel and can lift in the inner channel, and the jacking mechanism pushes the pre-clamping upper die to lift until the top of the pre-clamping upper die is flush with the upper surface of the lower die base.

5. The single punching die for punching and trimming the brake wheel of the brake disc of the washing machine according to claim 4, wherein the jacking mechanism comprises a middle jacking block (15) and a jacking cylinder (17) connected with the middle jacking block, the middle jacking block is positioned in the inner channel of the lower die holder, a spring groove is formed in the upper surface of the middle jacking block, a pre-clamping lower die jacking spring (16) is arranged in the spring groove, and the upper end of the pre-clamping lower die jacking spring is in contact with the lower surface of the pre-clamping lower die.

6. The single punching die for punching and trimming the brake wheel of the brake disc of the washing machine as claimed in claim 4, wherein the inner wall of the inner channel is provided with a guide groove, the side edge of the bottom of the pre-clamping lower die is provided with a radially outward protruding guide part, the guide part is embedded into the guide groove, and the upper end of the guide groove is closed to form a jacking limiting part of the pre-clamping upper die.

7. The single punch die for punching and trimming the brake disc brake wheel of the washing machine as claimed in claim 1, 2 or 3, wherein the lower end of the upper punch is a punch part (21) matched with the forming die cavity of the lower die holder, the shaft center of the upper punch is provided with a through hole, an upper die core rod capable of lifting in the through hole is arranged in the through hole, and the lower end of the upper die core rod is a core rod head (23) matched with the small die cavity of the pre-clamping lower die shaft center.

8. The single punch and trimming die for brake disc brake rotors of washing machines as claimed in claim 7, wherein the outer diameter of the mandrel head is smaller than that of the upper mandrel, and the upper end of the mandrel head forms a flared arc shoulder (22) having a central angle of 90 °.

9. The single punching die for punching and trimming the brake disc brake wheel of the washing machine as claimed in claim 1, 2 or 3, wherein an outer extrusion sleeve (8) is sleeved outside the upper punch, the outer diameter of the outer extrusion sleeve is larger than that of the punch head part at the lower end of the upper punch, the upper end of the outer extrusion sleeve is connected with an extrusion driving mechanism, and the extrusion driving mechanism pushes the outer extrusion sleeve to descend relative to the upper punch; the lower end of the external extrusion sleeve is provided with an annular external extrusion head (19), and a cavity (20) matched with the upper part of the punch head part is arranged in the external extrusion head.

10. The single punch and trimming die for the brake disc brake wheel of the washing machine as claimed in claim 9, wherein the extrusion driving mechanism comprises a turret (31) which descends synchronously with the upper punch, the turret is annular, a support leg (32) is fixed at the lower part of the turret, a rotating wheel (33) is arranged at the end part of the support leg, a convex part (34) which protrudes in an axial arc shape is arranged at the upper end of the outer extrusion sleeve, and the rotating wheel and the convex part cooperate to push the outer extrusion sleeve to descend.